KR20190055036A

KR20190055036A - 3d omit

Info

Publication number: KR20190055036A
Application number: KR1020190051760A
Authority: KR
Inventors: 임승현
Original assignee: 주식회사 피에스개발
Priority date: 2019-05-02
Filing date: 2019-05-02
Publication date: 2019-05-22

Abstract

A main objective of the present invention is to suggest a three-dimensional printer device using an UV-curable material, which can process materials and a very large number of other functional materials as structural materials. The three-dimensional printer device of the present invention, as a three-dimensional printer device using an UV-curable material to manufacture a three-dimensional laminated product object from a polymerizable UV-curable material, includes: a container having a bottom part and side walls for containing the UV-curable material; a carrier platform having the three-dimensional laminated product object formed thereon, and capable of performing displacement vertically with respect to the container; a structure member having a first side and a second side, and the UV-curable material polymerized at the first side to form an object layer; and a light source irradiating a ultraviolet ray passing through the structure member on the second side. The structure member is disposed in an upper part of the carrier platform, a distance between the structure member and the container can be variable, and the carrier platform includes a horizontality maintaining unit enabling the structure member to always maintain horizontality.

Description

3D printer apparatus using ultraviolet curing material {OMIT}

The present invention relates to a 3D printer device using an ultraviolet curing material capable of producing a three-dimensional laminated product by a reverse method using an ultraviolet curable material polymerized by ultraviolet rays.

BACKGROUND ART [0002] In the field of the recent laminated processing apparatus, a conventional three-dimensional printer technology consists of two apparatuses and a manufacturing method in which they are connected to each other.

In the so-called top-down method, the lamination processing apparatus includes a container provided with an ultraviolet curing material. An article to be formed in the form of a layer is formed in the form of being laminated on the water surface of such resin.

In this case, the surface of the resin is irradiated using an ultraviolet light source in the form of a layer to be formed. Thus, this layer is cured to a predetermined shape at the surface of the resin. The article is formed on a structural platform, and the platform is spaced from the surface of the resin until the article is formed in the form of a layer.

The top-down method has an advantage in that no abrasion is present. However, due to the presence of surface tension at the resin surface, the contour precision of the article produced using the top-down method is limited. Since the resin surface can not show a sophisticated surface, the surface of each layer is relatively inaccurate.

To improve the contour accuracy of the article, a so-called bottom-up method has been developed. In this method, the article layer to be formed is not formed on the surface of the resin but is formed on the bottom of the resin container. It is sufficient if a small amount of resin is present in the container as compared with the top-down method because the article is formed by moving the platform upward from the bottom of the resin container. The bottom must be covered with resin, and the resin can always flow between the bottom and the article to form a layer.

Since the ultraviolet light source is disposed under the bottom portion, the bottom portion must be capable of transmitting ultraviolet light.

To separate the cured layers from each other, a separate layer must be provided at the bottom. The separation layer represents the defined surface of each cured article layer. Therefore, the article produced by the bottom-up method has high stereoscopic precision.

However, since the separating layer mechanically laminates the separation of each cured layer, there is a worn portion, which must be continuously replaced by a new separating layer. In addition, since the resin containing the filler is not homogenized in the apparatus and the resin having an increased viscosity can not be processed, there is a disadvantage that only a few resins can be used as the structural material.

European Patent Laid-Open Publication No. EP 0467100A1 describes a lamination processing apparatus in which a layered three-dimensional article is placed between a transparent barrier plate and an article table. The article table is placed in a reactor filled with liquid to be cured. The plate is placed on the surface of the liquid. The plate is irradiated from above, through which the liquid is cured so as to have a layer with a sophisticated outline contour just below the plate. The plate is set to vibrate for the purpose of rocking the unit, and can be separated from the cured layer of the three-dimensional object. The article table is then lowered by the layer thickness of the next article layer, and the liquid can flow between the plate and the top cured layer. The next layer is then cured until the three-dimensional article is completed. Through such a device, the cured article layer can be carefully separated from the plate. It is possible to manufacture precise and precise articles. However, it is very complicated to change to another liquid that can be cured with radiation.

The main object of the present invention is to propose a 3D printer device using an ultraviolet curing material capable of treating a very large number of other functional materials as materials and structural materials.

As an embodiment, a 3D printer apparatus using an ultraviolet curing material for producing a three-dimensionally laminated product object from a polymerizable ultraviolet curing material, comprising: a container having a bottom portion and a side wall for accommodating the ultraviolet curing material; A carrier platform on which the three-dimensional laminated product object is formed and which is vertically displaceable relative to the container; A structural member having a first side and a second side, in which the ultraviolet curable material is polymerized in the first layer to form an object layer; And a light source for illuminating the second side with ultraviolet light passing through the structural member, wherein the structural member is disposed on top of the carrier platform, the distance between the structural member and the container being variable, Includes a horizontal holding device for keeping the structural element always horizontal.

The 3D printer apparatus using the ultraviolet curing material according to the present invention has the effect of treating a very large number of other functional materials as materials and structural materials.

1 is a view schematically showing a top-down printing method.
2 is a view schematically showing a bottom-up printing method.
3 is a view schematically showing a printing method according to an embodiment of the present invention.
4 to 6 are views showing various embodiments of the structural member.

BRIEF DESCRIPTION OF THE DRAWINGS The invention, which is set forth below, may be embodied with various changes and may have various embodiments, and specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms first, second, etc. may be used to distinguish between various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, in the case where at least two different embodiments are described in the present application, each embodiment can use all or a part of components mutually and in combination without having to go beyond the technical idea of the present invention .

A 3D printer using an ultraviolet curing material is shown in Figs. 1 and 2. Fig. The apparatus according to FIG. 1 is referred to as member number 1, and the apparatus according to FIG. 2 is referred to as member number 21.

The method shown in Fig. 1 is a top-down printing method. The device 1 to which this method is applied comprises a container 2 and an ultraviolet curing material 3 which is a polymerizable liquid provided therein. Preferably this liquid is a resin, which can be cured in ultraviolet radiation. An exposure source 4, which is one or more DLP projectors, is provided as a source of radiation.

The three-dimensional article 6 is formed in the form of being stacked on the upper side of the carrier platform 5 disposed inside the liquid 3. [ The carrier platform 5 is moved in the direction of the bottom portion 8 (7). In this case, the liquid 3 may flow in the form of a layer 10 between the article 6 and the liquid surface 9. This fluidized bed 10 is cured under the influence of radiation depending on the light-transmitting region formed on the surface 9. The finished article 6 can be removed from the liquid 3. [ Since the layers 10 are cured at the surface 9, there is no elaborate forming layer. Therefore, the precision of the article 6 to be formed is limited.

The method shown in Fig. 2 is a bottom-up printing method. This method is applied using an apparatus referred to as overall number 21. The exposure source 24 is irradiated from below the bottom portion 28 of the container 22. The structural member 31, in which the layers 30 of the article 26 are formed, is disposed in the bottom portion 28. The article 26 is formed in the form of a layer between the structural member 31 and the carrier platform 25. [ If the layer 30 is cured or polymerized, the carrier platform is displaced in the upward direction 27. When a space is formed between the structural member 31 and the article 26, the polymerizable liquid 23 can flow into it. The layer 30, which is cured on the structural member 31, must be separated from the structural member 31. Thus, the structural member 31 has to be worn and replaced at specific time intervals, since it must be considered as a wear-off portion.

The lamination processing apparatus shown in Fig. 3 is referred to as a post member number 41. Such a device is similar to conventional arrangements. However, the combination and arrangement of the configurations of the present invention has significant advantages.

The polymerizable liquid 43 is supplied to the container 42 or the container 42. [ The carrier platform 45 is disposed so as to be displaceable in a direction perpendicular to the container 42. This direction is indicated by the reference numeral 47. The article 46 is formed in a laminated form on the carrier platform 45. [ As shown in FIG. 3, the carrier platform 45 may be moved out of the vessel 42. Unlike the conventional method, the structural member 51 is disposed on the upper side of the carrier platform 45 and not on the container bottom portion 48. The structural member 51 has a first side and a second side 53, 55. The liquid 43 is polymerized to form the article layer 50 on the first side 53. The light of the light source 44 which penetrates the structural member 51 and cures the liquid 43 just above the first side 53 is irradiated on the second side 55. [ Preferably, the light source 44 is a DLP projector, which meets all of the requirements of the apparatus 41 of the present invention, so as to have a cost efficiency of a large quantity of manufactured articles. Preferably, the arrangements of the device 41 are arranged in a support 52 surrounded by a housing 54 and will be described in detail in the following description.

The carrier platform 45 and structural member 51 are preferably secured to a common support 52. In Fig. 3, the support 52 is shown schematically as a square. The support 52 may be configured to have an external appearance in a configuration in which additional configurations of the processing device 41, for example, a DLP projector 44, are disposed on the carrier platform 45 and the structural member 51 . The support 52 is displaceable with the carrier platform 45 and the structural member 51 relative to the container 42 along the direction of the arrow 47. The support 52 may advance toward the container 42 and may be fully retracted therefrom. When the support portion 52 is retracted from the container 42, since there is no portion to be fixed to the container 42, it can be quickly replaced with another container having the second liquid. The support 52 may be raised in the direction of the arrow 47 or retracted from the container 42 so that the container 42 can be replaced with another container. If the additional container is located in the holder provided for this purpose, the device of the present invention is ready for the process to be done very quickly again, as the support 52 advances to the additional container.

The carrier platform 45 is displaceably secured to the support portion 52. Accordingly, the distance between the carrier platform 45 and the structural member 51 can be changed. The three-dimensional article 46 can be formed by being stacked between the carrier platform 45 and the structural member 51 while the carrier platform 45 is continuously downwardly displaced. This is shown in the first displacement direction 62 in Fig. After the article 46 is formed, the carrier platform 47 may be displaced in the direction of the structural member 51 from the support member 52, so that additional articles may be formed in a laminated form. Since the carrier platform 45 is displaceably arranged in the displaceable support portion 52 in turn, the container 42 is free of the portion to be fixed through the displacement of the support portion 52. [

The carrier platform 45 may include a horizontal retention device to ensure that the structural element is always horizontal.

The DLP projector 44 is preferably displaceably arranged in the vertical direction of the support portion 52. [ This is illustrated by the second arrow 72. Through the displacement of the DLP projector 44, the resolution of the image to be projected on the structural member 51 can be changed and set quickly.

Since the bottom portion 48 is separated from the structural member 51 and the structural member 51 is disposed separately from the container 42 of the apparatus, the space existing on the bottom portion 48 is separated from the magnetic stirrer 57 ) Can be used to place. Thus, the polymerizable liquid 43 to be homogenized can be treated in the apparatus 41 of the present invention. Functional materials including filler 59 may be used. High viscosity resins may also be used. The magnetic stirrer 57 includes a plate 58, which can be heated or cooled, and on which the container 42 can be placed. A collar portion that can be cooled or heated while surrounding the vessel 42 for temperature control of the process can be considered. Further, the temperature of the structure chamber 56 can be set. By precisely setting the treatment temperature in the polymerizable liquid 43 to be treated, the various liquids 43 can be perfectly homogenized and set at the optimum treatment temperature. A stationary housing 60 surrounding the second side 55 may be provided on the top side of the structural member 51 which is located adjacent to the structural chamber 56 and which may be provided with an adjustable optical unit .

The carrier platform 45 and the container 42 are displaceable upwardly and downwardly along the arrow 47. Thus, the structural member 51 may be disposed over the liquid surface 49 or the liquid surface while the article 46 is being printed. The wetted article 46 with the liquid 43 is raised to the exterior of the liquid through the carrier platform 43 and is directed to the structural member 51 to be cured with the layer 50. [ To form the additional layer 50, the article must be submerged in the liquid reservoir portion of the vessel 42.

However, if necessary for printing of the article, the structural member 51 may be disposed on the surface 49 or inside the liquid 43. [ A layer is formed inside the liquid 43 and additional liquid for layer formation can flow directly from the vessel 42. [

A further advantage of separating the structural member 51 from the vessel 42 is that the vessel 42 can be separated from the apparatus 41 with the liquid 43 and the agitator, Another stirrer can be arranged in the device 41. [ Therefore, the change of the product can be executed within a very short time. The provided container 42 may preferably be closed using a cover.

Referring to FIG. 4, the structural member 51 may be formed from a separation membrane 61. The separator 61 is made of a non-adhesive material so that the separator can be separated from the separator by a very careful and easily printed layer 50. For example, perfluoroethylene propylene is particularly suitable. The material of the non-adhesive separator may be selected depending on the liquid to be cured. Since the structural member 51 is separated from the container 42, the structural member 51 may be quickly replaced with another structural member. 4, in addition to such a structural film 61, the structural member 51 may comprise, for example, a carrier plate 63 made of glass. Thus, the fixing property of the structural member 51 is improved. Further, the separation membrane 61 has a simple structure to be fastened or stretched or exchanged on the carrier plate 63.

5, the carrier plate 63 may be coated with a thin film 65 to improve non-adherence. In general, the thin film has a thickness of less than 10 mu m. The structural member 51 may also include a vibrator to improve separation of the article layer 50 and improve separation of adhering air bubbles. If a polymerizable liquid is used that needs to be provided with an inhibiting gas during formation of the layer, referring to FIG. 6, a permeable membrane 67 may be provided in the structural member 51.

When the article 46 is guided to the structural member 51, the structural member 51 is moved relative to the container 42 in order to remove air bubbles adhering to the topmost layer of the structural member 51 or the article 46 Can be inclined. To remove unwanted droplets, the first side 53 of the structural member 51 may be placed under partial vacuum, or a protective gas may be applied. The region in which a partial vacuum is preferably formed is indicated by the reference numeral 69, which represents a partial vacuum region. This area can be sealed against other areas inside the housing.

The partial vacuum region is preferably sealed by extending the support 52 toward the vessel 42 side. Since the partial vacuum region 69 has a reduced volume compared to the volume of the housing 54, a partial vacuum can be generated quickly. The partial vacuum region preferably encloses the carrier platform 45, the structural member 51 and in particular the first side 53 of the structural member 51. Thus, a partial vacuum or protective gas atmosphere may be formed in the first side 53 of the structural member 51. [

It should be noted that the embodiments disclosed in the drawings are merely examples of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims

A 3D printer device using an ultraviolet curing material for producing a three-dimensionally laminated product from a polymerizable ultraviolet curing material,
A container having a bottom and side walls for receiving said UV curable material;
A carrier platform on which the three-dimensional laminated product object is formed and which is vertically displaceable relative to the container;
A structural member having a first side and a second side, in which the ultraviolet curable material is polymerized in the first layer to form an object layer; And
And a light source for irradiating the second side with ultraviolet rays passing through the structural member,
Wherein the structural member is disposed on the carrier platform, the distance between the structural member and the container is changeable,
Wherein the carrier platform includes a horizontal holding device for keeping the structural member always horizontal.