WO2018026045A1

WO2018026045A1 - Three dimensional printer provided with resin storing part tilting device

Info

Publication number: WO2018026045A1
Application number: PCT/KR2016/009124
Authority: WO
Inventors: 최두원; 서준석; 원태희
Original assignee: 주식회사 큐비콘
Priority date: 2016-08-04
Filing date: 2016-08-18
Publication date: 2018-02-08
Also published as: KR101776778B1

Abstract

The present invention relates to a three dimensional printer provided with a resin storing part tilting device, in which a three dimensional structure formed on a supporting part can be separated from a transparent releasing part of a resin storing part without damage. The three dimensional printer comprises: a main body part provided with a light source that emits light; a resin storing part having at least a portion of a lower part thereof made of a transparent material, coupled to the main body part such that the light is emitted to one side thereof, and storing a photo curable resin; a supporting part disposed to ascend and descend over the resin storing part and having a lower part in which a three dimensional structure is modeled; a support driving part vertically elevating the supporting part; and a control unit controlling the light source and the support driving part to correspond to a modeling region of the three dimensional structure. The main body part comprises: a frame to which the resin storing part is hinge-coupled; a shaft inserted into the frame and having a hook part so as to contact one side surface of the resin storing part; and a shaft driving part vertically elevating the shaft. The control unit controls the shaft driving part so that the resin storing unit is tilted about a hinge-coupled portion, according to force applied on the one side surface of the resin storing part by the hook part when the shaft rises or descends.

Description

3D printer with tilting device

The present invention relates to a three-dimensional printer having a resin storage unit tilting device, and more particularly, to a three-dimensional structure formed on the support unit having a resin storage unit tilting device capable of separating without damage from the transparent release portion of the resin storage unit. It relates to a three-dimensional printer.

In the three-dimensional printing method, SRI (StereoLithography Apparatus) method using the principle that the scanned part is cured by scanning the laser light on the photocurable resin, functional polymer or metal powder is used instead of the photocurable resin in the SLA method, and the laser beam Selective Laser Sintering (SLS) method using the principle of scanning, solidifying and molding, FDM (Fused Deposition Modeling) method of stacking structures by extruding filaments, and partially curing by irradiating light to the lower part of the reservoir where the photocurable resin is stored. DLP (Digital Light Processing) method using the principle.

Among them, in the case of the 3D printer of the DLP method, the DLP projector irradiates light to the lower portion of the resin storage portion of the transparent material in which the photocurable resin is stored, and the photocurable resin in the light irradiated area is cured to form the lower portion of the support portion. To form a three-dimensional structure. That is, the 3D structure may be printed by a method in which light is irradiated in a shape corresponding to the cross-sectional shape of the 3D structure and the hardened portion is stacked in a multilayered manner as the support portion is raised.

At this time, the distance between the support and the resin reservoir is an important factor that determines the quality of the output, it is very important to adjust the level of the resin reservoir for this purpose. In general, in the case of a conventional three-dimensional printer, the structure is adjusted to the elastic body such as a spring. However, the structure that adjusts the horizontal level with the elastic body may produce a deviation of the product depending on the producer, the spring may be deformed or damaged when used for a long time, the foreign matter caught between the spring, the resin is stored when irradiating light Since the level of the negative cannot be maintained, there is a problem that the quality of the output is degraded. In addition, when the 3D structure formed on the support portion is separated from the resin storage portion while the support portion is raised, the hardened 3D structure does not separate well from the resin storage portion, and even if the 3D structure is damaged, the 3D structure is damaged during the separation process. many.

Prior Art Documents Korean Patent Publication No. 10-2016-0056033

The present invention has been proposed to solve the above-mentioned problems, and by controlling the shaft drive unit by the control unit to raise and lower one side of the resin storage unit is irradiated with light, it is possible to precisely adjust the level of the resin storage unit, three-dimensional formed in the support unit The present invention provides a three-dimensional printer having a resin storage part tilting device capable of separating the structure from the transparent release part of the resin storage part without damage.

The disclosed technology to achieve the above technical problem, the main body having a light source for irradiating light; At least a portion of the lower portion is a transparent material, the resin storage unit is coupled to the main body portion and the light is irradiated to a portion of the transparent material, and stores a photocurable resin; A support part disposed to ascend and descend above the resin storage part, and having a three-dimensional structure formed thereon; A support driver for elevating the support part in a vertical direction; And a controller configured to control the light source and the support driver in response to the molding area of the three-dimensional structure, wherein the body part comprises: a frame in which the resin storage part is hinged; A shaft inserted into the frame and having a locking portion formed to contact one side of the resin storage portion; And a shaft driving unit for elevating the shaft in an up and down direction, wherein the control unit is configured to hinge the portion of the resin storage unit based on a force applied to one side of the resin storage unit by the locking unit when the shaft is raised and lowered. The shaft drive is controlled to tilt.

Here, at least one first magnet is accommodated in the frame, and the resin storage unit accommodates at least one second magnet on the other side, and is applied to an attractive force between the at least one first magnet and the at least one second magnet. By tilting around the hinged portion.

On the other hand, the resin storage portion is a transparent material portion, optical acrylic; Release film laminated on the optical acrylic; And a soft film interposed between the optical acrylic and the release film, wherein the soft film is an elastic silicone OCA film.

On the other hand, the support is formed with a plurality of release grooves in the lower portion.

On the other hand, the main body portion is provided with a filter for absorbing gas and odor generated in the space in which the three-dimensional structure is to be molded.

Embodiments of the disclosed technology can have the effect of including the following advantages. However, the embodiments of the disclosed technology are not meant to include all of them, and thus the scope of the disclosed technology should not be understood as being limited thereto.

The three-dimensional printer with a resin storage unit tilting device according to the present invention controls the shaft drive unit by a control unit to raise and lower one side of the resin storage unit to which light is irradiated, so that the horizontality of the resin storage unit can be adjusted precisely, There is no horizontal change, resulting in high output stability.

In addition, since the resin storage portion is provided with a transparent release portion having elasticity on the bottom surface and is separated from the 3D structure formed on the support portion by tilting around the hinge coupling portion, the 3D structure can be separated from the transparent release portion of the resin storage portion without damage. It can be effective.

1 is a front view showing a three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention.

Figure 2 is a perspective view showing the support of the three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention.

3 and 4 are a front view and an exploded perspective view showing the main body portion and the resin storage portion of the three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention.

5 is an exploded perspective view showing a transparent mold release unit in the resin storage unit of the three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention.

Figure 6 is a front view showing the operation of the body portion and the resin storage unit in the three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention.

[Description of the code]

100: main body 110: frame

111: hinge coupling portion 111a: second groove

112: magnet receiving portion 113: insertion hole

114: penetrating portion 120: shaft

121: engaging portion 130: shaft drive portion

200: resin storage unit 210: transparent mold release unit

211: optical acrylic 212: release film

213: soft film 220: wing

221: first groove 230: second magnet

240: one side of the resin storage portion 241: locking groove

300: support 310: release groove

400: control unit

Description of the disclosed technology is only an embodiment for structural or functional description, the scope of the disclosed technology should not be construed as limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

The terms 'first', 'second', etc. are used to distinguish one component from another component and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprise" or "have" refer to a feature, number, step, operation, component, part or implementation thereof. It is to be understood that the combination is intended to be present, but not to exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

Each step may occur differently from the stated order unless the context clearly dictates the specific order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a view showing a three-dimensional printer having a resin storage unit tilting device according to an embodiment of the present invention, the three-dimensional printer having a resin storage unit tilting device of the present invention, the main body portion 100, The resin storage unit 200, the support unit 300, a support driver (not shown), and a control unit 400 (see FIG. 6) are included.

The main body 100 includes a light source (not shown) for irradiating light. The light source receives a split image from the controller 400, for example, an image by a G code file generated from an STL (STereoLithography) file or an OBJ file by slicing software, and receives light corresponding to the received image. It may be a DLP projector to investigate. In addition, although not shown, the main body portion 100 includes a filter portion (not shown). The filter unit is an impregnated activated carbon filter in which a chemical substance is deposited on the surface of the activated carbon to increase the adsorption performance of a gas having chemical properties. The filter unit may be closed by the door 10 and absorb gas and odor generated in a space in which the 3D structure is formed. In addition, the filter unit is provided to be easily replaceable to increase the user's convenience.

The resin storage unit 200 includes a transparent mold release unit 210 of which at least a portion of the lower portion is a transparent material. In addition, the resin storage unit 200 is coupled to the main body 100, the light irradiated from the light source is irradiated to the transparent mold release unit 210, a photo-curable resin that is a liquid material for forming a three-dimensional structure, for example, Acrylic resin, castable resin and the like are stored. In addition, the resin storage unit 200 provides a space in which the photocurable resin is cured by the light irradiated from the light source.

The support part 300 is disposed to move up and down on the resin storage part 200, and supports a three-dimensional structure in which the photocurable resin in the resin storage part 200 is cured and molded at the bottom. As shown in FIG. 2, the support part 300 has a plurality of release grooves 310 formed therein. The user can easily separate the three-dimensional structure formed in the lower portion of the support 300 by pushing the three-dimensional structure by inserting the tweezers, etc. in the plurality of release grooves 310.

The support driver (not shown) provides power to move up and down along the path (not shown) in which the support 300 is formed vertically. The support driver may be implemented by connecting various actuators such as a motor and a cylinder. Since a method of implementing a desired driving mechanism using various actuators is well known, a detailed description thereof will be omitted.

The controller 400 controls the light source and the support driver in response to the molding area of the three-dimensional structure. That is, the control unit 400 receives a control code such as a G code reflecting the cross-sectional image of the three-dimensional structure from a personal computer (PC) or a USB memory having a calculation function, and receives a lower portion of the resin storage unit 200 from the light source. The shape of the light irradiated with is controlled. In addition, the control unit 400 controls the support driving unit so that the support unit 300 gradually rises along a vertically formed path so as to solidify the three-dimensional structure formed by stacking the cross-sectional divided images for each layer. In this case, the controller 400 may include a function of generating a control code such as a G code by slicing the STL file or the OBJ file, but is not limited thereto.

3 and 4 are views illustrating a main body part 100 and a resin storage part 200 of a three-dimensional printer having a resin storage part tilting apparatus according to an embodiment of the present invention. .

The main body 100 includes a frame 110, a shaft 120, and a shaft drive unit 130.

The frame 110 includes a hinge coupler 111 to which the resin storage unit 200 is hinged. The hinge coupling part 111 is provided to correspond to the wing part 220 of the resin storage part 200. In addition, the hinge coupling part 111 has a second groove 111a communicating with the first groove 221 formed in the wing 220 of the resin storage part 200. Therefore, the hinge coupling part 111 and the resin storage part 200 may be coupled by a coupling means such as a bolt or a knob penetrating the first groove 221 and the second groove 111a. In this case, the hinge coupler 111 of the frame 110 may be provided at a position close to the left side of the support 300 (see FIG. 3). When one side 240 of the resin storage unit 200 hinged to the frame 110 descends while being tilted about the hinge coupler 111, the three-dimensional structure formed on the lower surface of the support part 300 is tilted. Since the gap is generated between the transparent release unit 210 of the resin storage unit 200, the three-dimensional structure can be separated from the transparent release unit 210. At this time, the larger the gap between the three-dimensional structure and the transparent mold release portion 210 may be more cleanly separated from the transparent mold portion 210 without residue from the three-dimensional structure. Therefore, by placing the hinge coupling portion closer to the left side of the support 300, the inclination of the transparent release portion 210 with respect to the lower surface of the support 300 has a maximum value when the resin reservoir 200 is tilted. The distance between the three-dimensional structure formed on the lower surface of the support portion 300 and the transparent release portion 210 can be made as large as possible.

In addition, although not shown, the hinge coupling portion 111 is a magnet (not shown) so that the wing portion 220 of the resin storage portion 200 can be accurately positioned at the coupling position when the resin coupling portion 200 is coupled to the resin storage portion 200. It may be provided. In addition, the hinge coupling portion 111 may be provided with a bearing (not shown) to enable a smooth tilting of the hinged resin storage unit 200. As such, the resin storage unit 200 may be coupled to the frame 110 to be easily and accurately detachable.

In addition, the frame 110 includes a magnet receiving portion 112. The magnet accommodating part 112 accommodates at least one first magnet (not shown) therein. In addition, as shown in FIG. 3, the resin storage unit 200 accommodates at least one second magnet 220 on the other side. In this case, the first magnet of the magnet accommodating part 112 and the second magnet 230 of the resin storing part 200 are provided at positions corresponding to each other so that an attractive force can act on each other. Here, the resin storage part 200 is because the wing portion 220 formed between one side 240 and the second magnet 230 of the other side is hinged to the hinge coupling portion 111 of the frame 110. When a force is applied to one of the one side and the other side of the resin storage unit 200, the resin storage unit 200 may be tilted around the hinge coupling portion. Therefore, when the attraction force between the first magnet and the second magnet 230 of the magnet receiving portion 112 is applied to the other side of the resin storage portion 200, the resin storage portion 200 will be tilted around the hinge coupling portion. Can be.

The shaft 120 is inserted into the insertion hole 113 of the frame 110. In addition, when the resin storage unit 200 is hinged to the frame 110, the shaft 120 is inserted into the engaging groove 241 formed on one side 240 of the resin storage unit 200. In this case, the shaft 120 has a locking portion 121 formed at one end thereof so as to contact one side surface 240 of the resin storage unit 200.

The shaft driver 130 lifts the shaft 120 in the vertical direction. The shaft driver 130 may be implemented by connecting various actuators such as a motor and a cylinder. Since a method of implementing a desired driving mechanism using various actuators is well known, a detailed description thereof will be omitted.

The control unit 400 is based on the hinge coupling portion of the resin storage unit 200 according to the force applied to one side 240 of the resin storage unit 200 by the locking portion 121 when the shaft 120 is raised and lowered. The shaft driver 130 is controlled to be tilted. When the shaft driving unit 130 is driven by the control unit 400 and the shaft 120 descends, the locking unit 121 is in contact with one side surface 240 of the resin storage unit 200, and the locking unit 121 descends. As a force is applied to one side surface 240 of the resin storage unit 200, one side surface 240 of the resin storage unit 200 is also simultaneously lowered. On the other hand, when the shaft drive unit 130 is driven by the control unit 400 and the shaft 120 rises to the maximum position, a gap is generated between the locking unit 121 and one side surface 240 of the resin storage unit 200. Therefore, the force applied to one side surface 240 of the resin storage part 200 by the locking part 121 is eliminated. At this time, the other side of the resin storage unit 200 is provided with a second magnet 230 so that the first magnet and the attraction force of the magnet receiving unit 112 acts so that the other side of the resin storage unit 200 is the magnet receiving unit 112. It is tilted to the side and thereby one side 240 of the resin storage portion 200 rises. Therefore, the resin storage unit 200 may be horizontal.

On the other hand, the light irradiated from the light source of the body portion is transmitted through the transmission portion 114 of the frame 110 is irradiated to the transparent mold release portion 210 of the resin storage unit 200. Here, the transparent mold release unit 210, which is a transparent material, preferably uses a material having excellent light transmittance so that the photocurable resin stored therein can be cured by the light irradiated from the light source. As shown in FIG. 5, the transparent release part 210 includes an optical acryl 211, a release film 212, and a soft film 213. The optical acrylic 211 is a rigid material so that the three-dimensional structure formed under the support 300 has a uniform stacking height, and has a high light transmittance. Since the release film 212 is excellent in transparency, durability, and releasability, the three-dimensional structure may be separated from the release film 212 and may rise along the support 300. On the other hand, the soft film 213 is a transparent film interposed between the optical acrylic 211 and the release film 212, and has a high light transmittance and a low reflectance. In addition, the soft film 213 is a silicon-based optical clear adhesive (OCA) film having a predetermined thickness and elasticity. In this case, the soft film 213 may buffer between the optical acryl 211 and the three-dimensional structure so that the three-dimensional structure may be smoothly separated from the release film 212 without being damaged. In addition, the transparent mold release unit 210 may be provided to be easily replaceable when a scratch or the like occurs.

6 is a front view showing the operation of the main body 100 and the resin storage unit 200 in the three-dimensional printer with a resin storage unit tilting device according to an embodiment of the present invention, with reference to FIGS. Referring to the operation of the main body 100 and the resin storage unit 200 in the three-dimensional printer with a resin storage unit tilting device of the present invention will be described.

First, the controller 400 controls the support driver to move the support 300 to a position where the output operation of the three-dimensional structure starts. Thereafter, the controller 400 controls the light source to irradiate light to the lower portion of the resin storage unit 200, and the photocurable resin in the region to which the light is irradiated cures to form a three-dimensional structure under the support unit 300. One-layer cured layer reflecting the cross-sectional divided image is laminated.

Thereafter, the control unit 400 irradiates light in the same manner while raising the support unit 300 by a predetermined height so that the two-layer cured layer is stacked below the one-layer cured layer. By repeatedly performing such a method by the controller 400, a plurality of hardened layers may be stacked to finally shape a three-dimensional structure.

On the other hand, the control unit 400 may control the shaft drive unit 130 so that one side surface 240 of the resin storage unit 200 can be tilted around the hinge coupling portion with the frame 110. At this time, when one side 240 of the resin storage part 200 is tilted and lowered about the hinge coupling part 111, the three-dimensional structure formed under the support part 300 is transparent of the resin storage part 200. It may be separated from the mold 210. At this time, since the transparent release part 210 of the resin storage part 200 is inclined downward with respect to the support part 300, the transparent release part 210 may be gently separated without damaging the three-dimensional structure formed under the support part 300. In addition, since one side 240 of the resin storage unit 200 descends, the photocurable resin stored therein also descends to one side, and thus, the photocurable resin required during the formation of the three-dimensional structure may be sufficiently filled to the region to which light is irradiated. have.

In addition, since the transparent release part 210 provided on the bottom surface of the resin storage part 200 has a soft film 213 having elasticity between the optical acrylic 211 and the release film 212, the soft film ( 213 buffers between the optical acrylic 211 and the three-dimensional structure so that the three-dimensional structure can be smoothly separated without being damaged when separated from the release film 212.

The disclosed method and apparatus have been described with reference to the embodiments illustrated in the drawings for ease of understanding, but these are merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand. Therefore, the true technical protection scope of the disclosed technology should be defined by the appended claims.

Claims

A main body having a light source for irradiating light;

At least a portion of the lower portion is a transparent material, the resin storage unit is coupled to the main body portion and the light is irradiated to a portion of the transparent material, and stores a photocurable resin;

A support part disposed to ascend and descend above the resin storage part, and having a three-dimensional structure formed thereon;

A support driver for elevating the support part in a vertical direction; And

A control unit for controlling the light source and the support driver in response to the molding area of the three-dimensional structure;

The main body portion,

A frame to which the resin storage unit is hinged;

A shaft inserted into the frame and having a locking portion formed to contact one side of the resin storage portion; And

It includes a shaft drive for elevating the shaft in the vertical direction,

The control unit includes a resin storage unit tilting device that controls the shaft drive unit such that the resin storage unit is tilted about a hinge coupling portion according to a force applied to one side of the resin storage unit by the locking unit when the shaft is lowered. One three-dimensional printer.
The method according to claim 1,

The frame contains at least one first magnet,

The resin storage unit,

At least one second magnet is accommodated on the other side, the three-dimensional printer having a resin storage unit tilting device tilted around the hinge coupling portion by the attraction between the at least one first magnet and the at least one second magnet. .
The method according to claim 1,

The transparent material portion of the resin storage portion,

Optical acrylic;

Release film laminated on the optical acrylic; And

It has a soft film interposed between the optical acrylic and the release film,

The soft film is a three-dimensional printer having a resin storage unit tilting device which is a silicone-based OCA film having elasticity.
The method according to claim 1,

The support portion is a three-dimensional printer having a resin storage unit tilting device formed with a plurality of release grooves at the bottom.
The method according to claim 1,

The main body portion,

And a resin storage part tilting device including a filter part for absorbing gas and odor generated in a space where the 3D structure is formed.