Molded member for removing foreign substance and method for removing foreign substance from photocurable liquid resin by using same

Abstract

A method for removing a foreign substance from a photocurable liquid resin according to the present invention may comprise the steps of: (A) moving a molding table to an initial working position of a vat in which a photocurable liquid resin is accommodated; and (B) emitting light from a light source unit provided at the lower portion of the vat toward the vat to mold, on the molding table, a molded member for removing a foreign substance, wherein, in step (B), the molded member for removing a foreign substance is configured to filter out a foreign substance present in the photocurable liquid resin and supply the photocurable liquid resin from which the foreign substance has been filtered out back to the vat.

Description

Mold for removing foreign substances and method for removing foreign substances in photocurable liquid resin using the same

[0001] The present invention relates to a mold for removing foreign substances and a method for removing foreign substances in a photocurable liquid resin using the same.

[0002] Generally, 3D printers can manufacture 3D objects using an additive manufacturing method similar to that used in inkjet printers, rather than milling or cutting.

[0003] 3D printing technology can be broadly categorized into various additive manufacturing methods, such as photocuring additive manufacturing, laser sintering additive manufacturing, resin extrusion additive manufacturing, inkjet additive manufacturing, PolyJet additive manufacturing, and thin film additive manufacturing. Among these, photocuring additive manufacturing manufactures 3D objects by curing photocurable liquid resin using a laser beam or strong ultraviolet rays (UV). Photocuring additive manufacturing methods include Stereo Lithography Apparatus (SLA), Digital Light Processing (DLP), and LCD methods.

[0004] To briefly explain the operation of the photocuring additive manufacturing method, the molding unit is moved to the initial working position of the tank containing the photocurable liquid resin. The initial working position of the molding unit may be located close to the film portion forming the bottom surface of the tank.

[0005] A light source unit positioned at the bottom of the tank can selectively project light onto a photocurable liquid resin to manufacture the required three-dimensional object. That is, a three-dimensional object can be molded on the lower surface of the molding table as it rises from the initial working position of the molding table.

[0006] However, if foreign substances are present in the photocurable liquid resin, the curing of the photocurable liquid resin may not proceed properly, and defects in the 3D model may occur. In particular, foreign substances settled on the lower surface of the tank may cause problems in that the curing does not proceed properly during the molding process of the first layer of the 3D model.

[0007] Foreign substances present in the tank may be, for example, particles that failed to settle on the build table and fell off during the 3D printing process, or particles that were damaged during the process of removing the 3D model after printing is completed.

[0008] Therefore, before molding a three-dimensional object, a foreign matter removal operation must be performed in advance to remove foreign matter settled on the bottom surface of the tank.

[0009] In the foreign substance removal process, conventionally, a molding table was not used, and light was irradiated onto the film section to cure the photocurable liquid resin located at the bottom of the tank section adjacent to the film section into a plate shape. Foreign substances settled at the bottom of the tank section may be contained within the cured product during the curing process of the photocurable liquid resin.

[0010] In this way, the cured material containing foreign substances was removed from the tank by an operator using a scraper or similar tool. However, there is a problem in that damage occurs to the film during the process of removing the cured material using a scraper or similar tool.

[0011] In addition, during the process of pushing out the cured material using a scraper, the photocurable liquid resin present on the top of the cured material overflows outside the tank, causing damage to the main parts of the 3D printer (such as the optical engine).

[0012] Therefore, various research and developments are being conducted on methods for removing foreign substances in photocurable liquid resins to prevent damage to the film part and parts of the tertiary printer when removing foreign substances in photocurable liquid resins.

[0013] The present invention aims to provide a mold for removing foreign substances configured to conveniently remove foreign substances present in a photocurable liquid resin contained in a tank, and a method for removing foreign substances in a photocurable liquid resin using the same.

[0014] A method for removing foreign substances in a photocurable liquid resin according to the present invention comprises: (A) a step of moving a molding table to an initial working position of a tank portion containing a photocurable liquid resin; and (B) a step of irradiating light from a light source portion provided at the bottom of the tank portion to the tank portion to mold a foreign substance removal molding object on the molding table, wherein in step (B), the foreign substance removal molding object filters out foreign substances in the photocurable liquid resin and supplies the photocurable liquid resin from which foreign substances have been filtered back to the tank portion.

[0015] The method for removing foreign substances in a photocurable liquid resin according to the present invention may further include: (B-1) a step of forming a first inclined plate that slopes downward from one side of the molding table to the outside; (B-2) a step of forming a first anti-detachment wall on both ends of the first inclined plate; and (B-3) a step of forming a plurality of support fixing parts that are spaced at predetermined intervals along the longitudinal direction of the molding table.

[0016] The method for removing foreign substances in a photocurable liquid resin according to the present invention (B-4) further comprises the step of forming a first foreign substance escape prevention member connected to the lower portion of the first inclined plate, wherein a plurality of first perforations are formed in the lower portion of the first inclined plate, so that the photocurable liquid resin moving along the inclined surface of the first inclined plate to the first foreign substance escape prevention member can move to the first perforations with foreign substances filtered out.

[0017] The method for removing foreign substances in a photocurable liquid resin according to the present invention may have the outer surface of the first detachment prevention wall vertically aligned with the inner surface forming the width of the water tank portion, and the outer surface of the first foreign substance detachment prevention section vertically aligned with the inner surface of one side of the water tank portion.

[0018] The method for removing foreign substances in a photocurable liquid resin according to the present invention further includes the step of forming a second inclined plate that slopes downward from the first foreign substance escape prevention section toward the other side of the water tank section, and the second inclined plate may be formed to be connected to the plurality of support fixing sections.

[0019] The method for removing foreign substances from a photocurable liquid resin according to the present invention further includes the step of forming a second anti-ejection wall on both ends of the second inclined plate to prevent the photocurable liquid resin from escaping, wherein the outer surface of the second anti-ejection wall may be vertically aligned with the inner surface forming the width of the tank portion.

[0020] The method for removing foreign substances in a photocurable liquid resin according to the present invention may be configured such that the plurality of support fixing members are spaced apart at a predetermined interval in the width direction to form a plurality of resin movement paths, the photocurable liquid resin moves along the inclined surface of the second inclined plate through the plurality of resin movement paths, and foreign substances present in the photocurable liquid resin are filtered by the plurality of support fixing members.

[0021] The method for removing foreign substances in a photocurable liquid resin according to the present invention (B-6) further includes the step of forming a second foreign substance escape prevention member connected to the lower portion of the second inclined plate, wherein a plurality of second perforated holes are formed in the lower portion of the second inclined plate, so that foreign substances present in the photocurable liquid resin moving to the second foreign substance escape prevention member are filtered, and the photocurable liquid resin from which foreign substances have been filtered is supplied back to the water tank through the second perforated holes.

[0022] The mold for removing foreign substances according to the present invention can be manufactured through the method for removing foreign substances in the photocurable liquid resin.

[0023] According to the present invention, a method for removing foreign substances in a photocurable liquid resin can effectively remove foreign substances present in the photocurable liquid resin through the molding of a foreign substance removal mold.

[0024] According to the present invention, the removal of foreign substances within the photocurable liquid resin is performed automatically, making the operation simple.

[0025] According to the present invention, the method for removing foreign substances in a photocurable liquid resin does not require the removal of foreign substances using a scraper, thereby preventing damage to the film portion and damage to parts of a 3D printer caused by overflow of the photocurable liquid resin.

[0026] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims.

[0027] FIG. 1 is an exemplary diagram schematically showing the state in which a mold for removing foreign substances according to the present invention is molded in a water tank.

[0028] FIGS. 2 and FIGS. 3 are perspective views of a mold for removing foreign substances according to the present invention.

[0029] FIGS. 4a to 4c are exemplary diagrams showing the state in which foreign substances are filtered out according to the present invention.

[0030] FIG. 5 is a flowchart illustrating a method for removing foreign substances from a photocurable liquid resin according to the present invention.

[0031] FIGS. 6a to 6h are example diagrams schematically illustrating the process for removing foreign substances from a photocurable liquid resin according to the present invention.

[0032] The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0033] Throughout the specification, when it is stated that a part is "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0034] In the present invention, "upper" and "lower" refer to being located above or below the target member, and do not necessarily mean being located above or below with respect to the direction of gravity.

[0035] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0036] FIG. 1 is an exemplary diagram schematically showing the state in which a mold for removing foreign substances according to the present invention is molded in a water tank, FIG. 2 and FIG. 3 are perspective views of the mold for removing foreign substances according to the present invention, and FIG. 4a to FIG. 4c are exemplary diagrams showing the state in which foreign substances are filtered according to the present invention. Here, FIG. 4a is a partial enlarged view of the first foreign substance escape prevention section, FIG. 4b is a partial enlarged view of the support fixing section, and FIG. 4c is a partial enlarged view of the first foreign substance escape prevention section.

[0037] Referring to FIGS. 1 to 4c, the 3D printer may include a light source unit (100), a panel unit (200), a water tank unit (300), and a molding table (400).

[0038] The light source unit (100) is positioned at the bottom of the water tank unit (300) and is configured to irradiate light onto the photocurable liquid resin (1) contained in the water tank unit (300).

[0039] Light irradiated from the light source unit (100) can be irradiated to the water tank unit (300) through a panel unit (200) provided between the light source unit (100) and the water tank unit (300).

[0040] The panel section (200) can transmit light irradiated from the light source section (100) in a specific form and provide light to the water tank section (300) located on the upper part of the panel section (200).

[0041] More specifically, the panel section (200) can transmit light to the area corresponding to the slice data divided into cross-sectional layers of the three-dimensional structure and provide light to the tank section (300).

[0042] The molding table (400) is moved sequentially in the upward direction (height direction) while in a state where it has been moved to the required initial working position within the tank section (300), so that a three-dimensional mold is formed on the lower surface of the molding table (400). At this time, the initial working position of the molding table (400) may be a position close to the film section (310) forming the bottom surface of the tank section (300).

[0043] The three-dimensional mold according to the present invention may include a mold (500) for removing foreign substances (2) present in the photocurable liquid resin (1).

[0044] The foreign substance removal mold (500) may include a first inclined plate (510), a support fixing part (520), a first foreign substance detachment prevention section (530), a second inclined plate (540), a first detachment prevention wall (551), a second detachment prevention wall (552), and a second foreign substance detachment prevention section (560).

[0045] The upper part of the first inclined plate (510) can be molded while being joined to one side of the lower surface of the molding table (400).

[0046] The first inclined plate (510) can be formed to have a downward slope from one side of the molding table (400) outward. That is, the first inclined plate (510) can be formed to have a downward slope toward one side of the water tank (300).

[0047] The first foreign substance escape prevention member (530) can be connected to the lower end of the first inclined plate (510). The first foreign substance escape prevention member (530) can filter out foreign substances (2) present in the photocurable liquid resin (1) moving along the inclined surface of the first inclined plate (510).

[0048] A plurality of first perforations (511) may be formed at predetermined intervals along the width direction of the first inclined plate (510) at the lower portion of the first inclined plate (510). These first perforations (511) may be formed, for example, with a size such that foreign substances (2) present in the photocurable liquid resin (1) are filtered out, and only the photocurable liquid resin (1) passes through.

[0049] The first foreign substance escape prevention section (530) can be molded so that foreign substances (2) present in the photocurable liquid resin (1) moved along the inclined surface of the first inclined plate (510) are trapped in the first removal space (S1) formed together with the first inclined plate (510) and the first escape prevention wall (551).

[0050] The outer surface of the first foreign substance escape prevention member (530) can be molded to correspond to the inner surface of one side of the water tank (300). That is, the outer surface of the first foreign substance escape prevention member (530) can be molded to be vertically aligned parallel to the inner surface of one side of the water tank (300) while being slightly spaced apart. At this time, the first foreign substance escape prevention member (530) can be molded so that foreign substances (2) cannot move into the spaced-apart area between the outer surface of the first foreign substance escape prevention member (530) and the inner surface of one side of the water tank (300).

[0051] For example, if the outer surface of the first foreign substance escape prevention member (530) is molded to directly contact the inner surface of one side of the water tank (300), the foreign substance removal mold (500) cannot move upward. Therefore, the first foreign substance escape prevention member (530) is molded so that there is a slight gap between the outer surface of the first foreign substance escape prevention member (530) and the inner surface of one side of the water tank (300).

[0052] The first anti-detachment wall (551) is formed in a shape connected to both ends of the first inclined plate (510) to prevent external detachment of the photocurable liquid resin (1) and foreign substances (2).

[0053] The first anti-detachment wall (551) can guide the direction of movement of the photocurable liquid resin (1) so that the photocurable liquid resin (1) moves along the inclined surface of the first inclined plate (510) without the photocurable liquid resin (1) detaching from the first inclined plate (510).

[0054] The outer surface of the first anti-detachment wall (551) can be formed to be vertically aligned parallel to the inner surface forming the width of the water tank section (300). The outer surface of the first anti-detachment wall (551) can be slightly spaced apart from the inner surface forming the width of the water tank section (300).

[0055] In the process where the molding table (400) is moved upward and the first inclined plate (510) and the first foreign substance escape prevention section (530) are molded at the bottom of the molding table (400), foreign substances (2) in the photocurable liquid resin (1) contained on one side of the tank (300) can be trapped in the first removal space (S1) based on a virtual vertical line (V) passing over the top of the first inclined plate (510).

[0056] Meanwhile, the support fixing part (520) can be formed at predetermined intervals along the length direction of the molding plate (400).

[0057] The lower end of the support fixing part (520) is connected to the second inclined plate (540), so that the second inclined plate (540) can be supported and fixed to the molding table (400).

[0058] The support fixing part (520) may be spaced apart at predetermined intervals so that a plurality of resin movement paths (521) are formed in the width direction. Accordingly, the photocurable liquid resin (1) can be moved along the inclined surface of the second inclined plate (540) through the resin movement path (521).

[0059] The resin movement path (521) can be formed in various forms, for example, in the form of a hole. In the present invention, the resin movement path (521) is formed by molding the support fixing part (520) apart in the width direction.

[0060] The support fixing part (520) is configured to filter out foreign matter (2) in the photocurable liquid resin (1) moving along the inclined surface of the second inclined plate (540).

[0061] A plurality of support fixing parts (520) spaced apart along the length of the molding unit (400) are configured to filter out foreign substances (2) present in the water tank (300) in each section.

[0062] Meanwhile, the second inclined plate (540) can be formed to slope downward from the first foreign matter escape prevention section (530) toward the other side of the water tank section (300).

[0063] The second inclined plate (540) can guide the movement of the photocurable liquid resin (1) as the molding table (400) moves upward.

[0064] The length (D1, see FIG. 6g) of the second inclined plate (540) based on the horizontal line can be molded to correspond to the length (D2, see FIG. 6g) of the receiving space inside the tank section (300). Accordingly, foreign substances (2) in the photocurable liquid resin (1) contained in the tank section (300) can be effectively filtered through the support fixing part (520).

[0065] The second anti-detachment wall (552) can be formed on both ends of the second inclined plate (540).

[0066] The outer surface of the second anti-detachment wall (552) can be formed to be vertically aligned parallel to the inner surface forming the width of the water tank section (300). The outer surface of the second anti-detachment wall (552) can be slightly spaced apart from the inner surface forming the width of the water tank section (300), similar to the first anti-detachment section (530) mentioned earlier.

[0067] The second anti-detachment wall (552) is connected to the second inclined plate (540) and the second foreign matter anti-detachment section (560) and can form a fence.

[0068] The second anti-detachment wall (552) can prevent the photocurable liquid resin (1) from detaching from both ends of the second inclined plate (540) during the process of the photocurable liquid resin (1) moving along the inclined surface of the second inclined plate (540). That is, the second anti-detachment wall (552) can guide the direction of movement of the photocurable liquid resin (1) so that it moves along the inclined surface of the second inclined plate (540) without the photocurable liquid resin (1) detaching from the second inclined plate (540).

[0069] Meanwhile, the second foreign matter escape prevention section (560) can be connected to the lower part of the second inclined plate (540).

[0070] The second foreign substance escape prevention section (560) can filter out foreign substances (2) present in the photocurable liquid resin (1) moving along the inclined surface of the second inclined plate (540).

[0071] A plurality of second perforations (541) may be formed at predetermined intervals along the width direction of the second inclined plate (540) at the lower portion of the second inclined plate (540). The size of these second perforations (541) may be formed such that they filter out foreign substances (2) present in the photocurable liquid resin (1) and allow only the photocurable liquid resin (1) to pass through.

[0072] The photocurable liquid resin (1) that passes through the second perforated hole (541) and falls into the water tank (300) may be a photocurable liquid resin (1) from which foreign substances (2) within the photocurable liquid resin (1) have been removed.

[0073] The second foreign substance escape prevention section (560) can be molded so that foreign substances (2) present in the photocurable liquid resin (1) moved along the inclined surface of the second inclined plate (540) are trapped in the second removal space (S2) formed together with the second inclined plate (540) and the second escape prevention wall (552).

[0074] Since the second foreign substance detachment prevention unit (560) is configured to correspond to the first foreign substance detachment prevention unit (530), a detailed description thereof will be omitted.

[0075] FIG. 5 is a flowchart showing a method for removing foreign substances in a photocurable liquid resin according to the present invention, and FIG. 6a to 6h are example diagrams schematically showing a process for removing foreign substances in a photocurable liquid resin according to the present invention.

[0076] Referring to FIGS. 5 to 6h, the molding table (400) can be moved to a required initial working position in a tank section (300) containing a photocurable liquid resin (1). The initial working position to which the molding table (400) is moved may be a position close to the film section (310) forming the bottom surface of the tank section (300). (S100)

[0077] The light source unit (100) can irradiate light to the water tank unit (300) to form a molded object (500) for removing foreign substances on the molding table (400). (S200)

[0078] The foreign substance removal mold (500) filters out foreign substances (2) in the photocurable liquid resin (1), and the photocurable liquid resin (1) from which foreign substances (2) have been filtered is supplied back to the water tank (300).

[0079] Let us examine in detail the molding step of the foreign substance removal mold (500) as described above.

[0080] Referring to FIG. 6a, the molding table (400) is moved to the required initial working position of the tank section (300) containing the photocurable liquid resin (1).

[0081] Referring to FIG. 6b, the molding table (400) rises sequentially, and a first inclined plate (510) that slopes downward from one side of the molding table (400) to the outside can be formed at the bottom of the molding table (400).

[0082] And, a first anti-detachment wall (551) may be formed on both ends of the first inclined plate (510). The first anti-detachment wall (551) is formed to prevent the photocurable liquid resin (1) from detaching from both ends of the first inclined plate (510).

[0083] The outer surface of the first anti-detachment wall (551) can be formed to be vertically aligned with the inner surface forming the width of the water tank (300).

[0084] In addition, a plurality of support fixing parts (520) can be formed at predetermined intervals along the length direction of the molding plate (400). These support fixing parts (520) are spaced apart at predetermined intervals in the width direction and can be formed to form a resin movement path (521).

[0085] The first inclined plate (510) and the support fixing part (520) can be formed on the lower part of the molding table (400) during the process of the molding table (400) moving upward.

[0086] Referring to FIG. 6c, the first foreign substance escape prevention section (530) can be formed on the lower part of the first inclined plate (510). The first foreign substance escape prevention section (530) can filter out foreign substances (2) present in the photocurable liquid resin (1) moving along the first inclined plate (510).

[0087] The outer surface of the first foreign substance escape prevention section (530) can be molded to be vertically aligned at a position corresponding to the inner surface of one side of the water tank section (300).

[0088] Referring to FIGS. 6d to 6f, the second inclined plate (540) can be formed to slope downward from the first foreign matter escape prevention section (530) toward the other side of the water tank section (300).

[0089] The second inclined plate (540) can be formed to be connected to a plurality of spaced support fixing parts (520).

[0090] The second anti-detachment wall (552) can be molded at both ends of the second inclined plate (540) to prevent the photocurable liquid resin (1) from detaching.

[0091] The outer surface of the second anti-detachment wall (552) can be formed to be vertically aligned with the inner surface forming the width of the water tank (300).

[0092] A plurality of support fixing parts (520) connected to the second inclined plate (540) can form a plurality of resin movement paths (521) in the width direction. The photocurable liquid resin (1) can be moved along the inclined surface of the second inclined plate (540) through the resin movement paths (521), and foreign substances (2) within the photocurable liquid resin (1) can be filtered by the plurality of support fixing parts (520).

[0093] The second foreign matter escape prevention section (560) can be molded to be connected to the lower part of the second inclined plate (540).

[0094] The second foreign substance escape prevention section (560) can filter out foreign substances (2) present in the photocurable liquid resin (1) that has moved along the second inclined plate (540).

[0095] A plurality of second perforated holes (541) may be formed at predetermined intervals along the width direction of the second perforated plate (540) at the lower end of the second inclined plate (540) connected to the second foreign substance escape prevention section (560). Accordingly, foreign substances (2) present in the photocurable liquid resin (1) are filtered by the second foreign substance escape prevention section (560), and the photocurable liquid resin (1) from which foreign substances (2) have been removed can be supplied back to the water tank section (300) through the second perforated holes (541).

[0096] Referring to FIG. 6g and FIG. 6h, the foreign substance removal mold (500) can be removed from the molding table (400) after finally removing the foreign substance (2) from the photocurable liquid resin (1). Thus, the foreign substance removal operation of the photocurable liquid resin (1) in the tank section (300) can be effectively carried out.

[0097] However, this is merely a preferred embodiment of the present invention, and the scope of the rights of the present invention is not limited by the scope of description of such embodiment.

[0098] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0099] The scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

Claims

1. (A) A step of moving the molding table to an initial working position of a tank portion containing a photocurable liquid resin; and (B) A step of irradiating light from a light source unit provided at the bottom of the tank unit to the tank unit to form a foreign substance removal mold on the molding unit, and A method for removing foreign substances in a photocurable liquid resin, wherein in step (B) above, the foreign substance removal mold filters out foreign substances in the photocurable liquid resin and supplies the photocurable liquid resin from which foreign substances have been filtered back to the tank portion.

2. In Paragraph 1, The above (B) step is, (B-1) A step of forming a first inclined plate that slopes downward from one side of the molding table outwardly; (B-2) A step of forming a first anti-detachment wall on both ends of the first inclined plate; and (B-3) A method for removing foreign substances in a photocurable liquid resin, further comprising the step of forming a plurality of support fixing parts at predetermined intervals along the length direction of the molding table.

3. In Paragraph 2, The above (B) step is, (B-4) Further includes the step of forming a first foreign matter escape prevention section connected to the lower end of the first inclined plate, and A method for removing foreign substances from a photocurable liquid resin, characterized in that a plurality of first perforations are formed in the lower portion of the first inclined plate, and the photocurable liquid resin, which moves along the inclined surface of the first inclined plate to the first foreign substance escape prevention section, moves to the first perforations while the foreign substances are filtered out.

4. In Paragraph 3, The outer surface of the first anti-detachment wall is vertically aligned with the inner surface forming the width of the water tank section, and A method for removing foreign substances in a photocurable liquid resin, characterized in that the outer surface of the first foreign substance escape prevention section is vertically aligned with the inner surface of one side of the water tank section.

5. In Paragraph 3, The above (B) step is, (B-5) further includes the step of forming a second inclined plate that forms a downward slope from the first foreign substance escape prevention section to the other side of the water tank section, and A method for removing foreign substances in a photocurable liquid resin, characterized in that the second inclined plate is formed to be connected to the plurality of supporting fixing parts.

6. In Paragraph 5, The above (B-5) step is, The method further includes the step of forming a second anti-detachment wall on both ends of the second inclined plate to prevent the photocurable liquid resin from detaching. A method for removing foreign substances in a photocurable liquid resin, characterized in that the outer surface of the second anti-detachment wall is vertically aligned with the inner surface forming the width of the tank section.

7. In Paragraph 5, The plurality of support fixing members are spaced apart at predetermined intervals in the width direction to form a plurality of resin movement paths, and the photocurable liquid resin moves along the inclined surface of the second inclined plate through the plurality of resin movement paths. A method for removing foreign substances in a photocurable liquid resin, characterized in that foreign substances present in the photocurable liquid resin are filtered by the plurality of supporting fixing parts.

8. In Paragraph 5, The above (B) step is, (B-6) Further includes the step of forming a second foreign matter escape prevention end connected to the lower end of the second inclined plate, and A method for removing foreign substances in a photocurable liquid resin, characterized in that a plurality of second perforated holes are formed in the lower portion of the second inclined plate, so that foreign substances present in the photocurable liquid resin moving to the second foreign substance escape prevention portion are filtered out, and the photocurable liquid resin from which foreign substances have been filtered is supplied back to the water tank portion through the second perforated holes.

9. A mold for removing foreign substances manufactured by the method for removing foreign substances in a photocurable liquid resin according to Paragraph 1.

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