Coating device and 3D printer

Abstract

The invention provides a coating device and a 3D printer. The coating device comprises a mounting mechanism, a coating mechanism and a driving mechanism. The mounting mechanism is configured to be used for mounting a to-be-coated part; the coating mechanism comprises at least two coating assemblies, the at least two coating assemblies comprise the first coating assembly and the second coating assembly which are arranged in the first direction, and each coating assembly comprises a material storage part and a coating part; the coating piece is configured to be used for coating the surface of the to-be-coated piece with the photo-curing material stored by the storage piece; the driving mechanism is in transmission connection with the coating mechanism and used for driving the coating mechanism to reciprocate between the first side and the second side in the first direction. 3D printing of at least two photocuring materials can be achieved conveniently.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a coating device and a 3D printer. Background Art

[0002] Stereolithography 3D printers typically use a light source within a specific wavelength range to illuminate liquid photocurable resin, initiating a photochemical reaction that solidifies the resin from the liquid state in the illuminated area. During the development of this application, the inventors discovered that related technologies have at least the following issues: Stereolithography 3D printers are not easily adaptable to printing with different photocurable materials. Summary of the Invention

[0003] The present application provides a coating device and a 3D printer to solve the problem in the related art that light-curing 3D printers are not convenient for printing different light-curing materials.

[0004] In one aspect, the present application provides a coating device, It includes a mounting mechanism, a coating mechanism, and a driving mechanism; the mounting mechanism is configured to mount the workpiece to be coated; the coating mechanism includes at least two coating components, the at least two coating components include a first coating component and a second coating component arranged along a first direction, the coating component includes a material storage component and a coating component, and the coating component is configured to apply the photocurable material stored in the material storage component to the surface of the workpiece to be coated; the driving mechanism is transmission-connected to the coating mechanism, and is used to drive the coating mechanism to reciprocate between the first side and the second side along the first direction.

[0005] In a possible implementation, the coating assembly further includes a scraper connected to the storage member, and the scraper is used to scrape off the applied photocurable material.

[0006] In a possible implementation manner, the two scraping members of the first coating component and the second coating component are located between the two coating components.

[0007] In a possible embodiment, when the driving mechanism drives the coating mechanism to move, the coating mechanism is used to lift the to-be-coated area of the to-be-coated part toward a side away from the forming plate.

[0008] In a possible embodiment, when the coating mechanism moves to a portion outside the area to be coated, the area to be coated falls back until the photocurable material coated on the area to be coated contacts the forming plate.

[0009] In a possible implementation, the coating assembly further includes a pressing plate, and along the first direction, the pressing plate is located on a side of the scraping member away from the material storage member.

[0010] In a possible implementation manner, the coating assembly further includes a first guide member, and along the first direction, the first guide members of the first coating assembly and the second coating assembly are located between the two pressing plates.

[0011] In one possible embodiment, a storage cavity is provided in the storage member, and along the first direction, a material opening is provided on the side of the storage member in the first coating assembly and the second coating assembly away from the other material storage member, and the material opening is connected to the storage cavity.

[0012] In a possible embodiment, along the second direction, the scraping member is provided at an edge of the material port away from the forming plate, and the coating member is provided at an edge of the material port close to the forming plate, and the second direction intersects with the first direction.

[0013] In a possible embodiment, the coating assembly further includes a pumping piece, which is connected to the material storage cavity and is used to inject the photocurable material into the material storage cavity or pump out the photocurable material in the material storage cavity.

[0014] In a possible implementation, the coating assembly further includes a liquid level detection component, which is configured to detect the liquid level of the photocurable material in the storage chamber.

[0015] In a possible embodiment, the driving mechanism includes a driving assembly and a sliding member, the driving assembly is transmission-connected to the sliding member and is used to drive the sliding member to slide along the first direction, and the first coating assembly and the second coating assembly are connected to the sliding member.

[0016] In a possible embodiment, the coating mechanism further includes an air blowing assembly, wherein the air blowing assembly is connected to the sliding member and is configured to blow air toward the forming plate.

[0017] In a possible embodiment, the mounting mechanism includes a clamping assembly configured to clamp one end of the object to be coated.

[0018] In a possible implementation, the installation mechanism includes a tension detection member, and the tension detection member is connected to the clamping assembly.

[0019] On the other hand, the present application also provides a 3D printer, comprising a light source assembly, the above-mentioned coating device and a molding plate, wherein the light source assembly is used to emit curing light for curing the photocurable material; along the second direction, the molding plate is arranged on the side of the coating device away from the light source assembly, and the molding plate is used to contact the photocurable material coated on the coating part to receive the cured photocurable material.

[0020] One of the above technical solutions has the following advantages or beneficial effects: By providing at least two coating components, different types of photocurable materials (including different colors, different materials, etc.) can be stored in the storage parts of different coating components, so that at least two photocurable materials can be coated on the surface of the workpiece to be coated, facilitating the 3D printing of at least two photocurable materials. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the 3D printer of the present application in an embodiment.

[0022] Figure 2 It is a schematic structural diagram of the coating device of the present application in an embodiment.

[0023] Figure 3 It is a partial schematic structural diagram of the coating device of the present application in an embodiment.

[0024] Figure 4 It is Figure 3 a schematic cross-sectional view of the coating device in

[0025] Figure 5 It is a schematic structural diagram of the coating mechanism of the coating device of the present application in an embodiment.

[0026] Figure 6 It is Figure 5 a partial enlarged schematic view of the corresponding area A of the coating device in

[0027] Figure 7 It is a bottom view schematic diagram of the coating mechanism of the coating device of the present application in an embodiment.

[0028] Figure 8 It is a schematic structural diagram of the light source component of the 3D printer of the present application in an embodiment.

[0029] Figure 9 It is a schematic structural diagram of the lifting component of the 3D printer of the present application in an embodiment.

[0030] Description of Main Component Symbols: 200, 3D printer; 100, coating device; X, first direction; Z, second direction; Y, third direction; W1, first side; W2, second side; 1, workpiece to be coated; 10, mounting mechanism; 11, clamping assembly; 110, tension detection component; 12, winding and unwinding assembly; 121, second driving component; 122, winding and unwinding component; 13, guiding assembly; 131, sliding seat; 132, second guiding component; 20, coating mechanism; 21, coating assembly; 211, material storage component; 2111, material storage cavity; 2112, material outlet; 2113, recovery port; 2114, pumping port; 212, coating component; 213, scraping component; 2130, scraping groove; 214, pumping component; 215, recovery valve; 216, recovery component; 2160, recovery cavity; 217, pressing plate; 218, first guiding component; 219, third guiding component; 22, light-transmitting component; 23, first coating assembly; 24, second coating assembly; 25, air-blowing assembly; 251, air pipe; 2510, air-blowing port; 30, driving mechanism; 31, driving assembly; 311, first driving component; 312, lead screw; 313, threaded sliding sleeve; 32, sliding component; 40, frame; 41, top plate; 410, light-transmitting port; 42, support leg; 50, forming plate; 60, light source assembly; 61, dust-proof cover; 62, cooling fan; 63, laser emitter; 64, focal length adjustment component; 70, lifting assembly; 71, lifting driving component; 72, lifting plate.

[0031] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific Embodiments

[0032] The following description will describe the content of the present application more comprehensively with reference to the drawings. The exemplary embodiments shown in the drawings are of the present application. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0033] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Additionally, when used herein, "comprises" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0035] The following further describes in detail the specific embodiments of the present application with reference to the accompanying drawings.

[0036] As Figures 1 to 4 shown, this embodiment provides a coating device 100 for coating a photocurable material on the surface of a workpiece 1 to be coated. The photocurable material can be a consumable such as photosensitive resin used in the field of photocurable 3D printing, and the workpiece 1 to be coated can be a product such as a release film serving as a carrier for coating the photosensitive resin. The surface of the release film can be corona treated to improve the printing effect of the release film and improve the surface tension of the photosensitive resin on the release film, ensuring that the photosensitive resin can firmly adhere to the release film.

[0037] For the convenience of subsequent reading, the present application introduces a first direction X, a second direction Z, and a third direction Y to describe the embodiments of the present application. The first direction X, the second direction Z, and the third direction Y can be three non-parallel straight-line directions in space; further, the first direction X, the second direction Z, and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In subsequent embodiments, the first direction X is taken as the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Z is taken as the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is taken as the Y-axis direction of the coordinate axis of the three-dimensional coordinate system as an example for description.

[0038] The coating device 100 includes a mounting mechanism 10, a coating mechanism 20, and a drive mechanism 30. The mounting mechanism 10 is configured to mount a workpiece 1 to be coated. Along a second direction Z, the surface of the workpiece 1 to be coated, mounted on the mounting mechanism 10, faces a molding plate 50, on which a photocurable material is cured and formed. Along the second direction Z, the coating mechanism 20 is positioned on one side of the workpiece 1 and between the workpiece 1 and the molding plate 50. The coating mechanism 20 includes at least two coating assemblies 21, each comprising a first coating assembly 23 and a second coating assembly 24 arranged along a first direction X. The coating assembly 21 includes a material storage member 211 and a coating member 212. The coating member 212 is configured to apply the photocurable material stored in the material storage member 211 to the surface of the workpiece 1. The drive mechanism 30 is in transmission connection with the coating mechanism 20 and is configured to drive the coating mechanism 20 to reciprocate along the first direction X between a first side W1 and a second side W2. The first side W1 and the second side W2 can be understood as the left and right sides of the coating device 100 in the first direction X.

[0039] When the coating mechanism 20 moves toward the first side W1 along the first direction X, the coating unit 212 of one of the first coating assembly 23 and the second coating assembly 24 applies a photocurable material to the surface of the object 1 to be coated. When the coating mechanism 20 moves toward the second side W2 along the first direction X, the coating unit 212 of the other of the first coating assembly 23 and the second coating assembly 24 applies a photocurable material to the surface of the object 1 to be coated.

[0040] In this embodiment, the number of coating mechanisms 20 is set to one, enabling two-color printing. It is understood that in other embodiments, the number of coating mechanisms 20 is set to at least two, with at least two coating mechanisms 20 arranged sequentially along the first direction X. Each coating assembly 21 of the at least two coating mechanisms 20 is used to apply a single type of photocurable material, thereby enabling three-color or more printing operations.

[0041] In some embodiments, at least two coating mechanisms 20 may be driven by a drive mechanism 30 to achieve synchronous sliding of at least two coating mechanisms 20. In other embodiments, each coating mechanism 20 is configured with a corresponding drive mechanism 30 to achieve independent operation of each coating mechanism 20.

[0042] In this way, the coating device 100 of the present application, by setting at least two coating components 21, can store different types (including different colors, different materials, etc.) of photocurable materials in the material storage parts 211 of different coating components 21, so as to coat at least two photocurable materials on the surface of the part 1 to be coated, thereby realizing 3D printing of at least two photocurable materials.

[0043] In addition, the two material storage components 211 are respectively equipped with coating components 212, so that different photocurable materials can be applied to the surface of the to-be-coated object 1 through different coating components 212, thereby avoiding the use of a single coating component 212 to apply two different photocurable materials, resulting in residual photocurable material applied earlier affecting the molding effect of the subsequently applied photocurable material. At the same time, the present application uses a drive mechanism 30 to simultaneously drive the movement of the two coating components 21, and by limiting the movement direction of the coating components 21, the application of the corresponding type of photocurable material is achieved, thereby reducing the cost and weight of the equipment while achieving 3D printing of at least two colors.

[0044] Please combine again Figures 2 to 4 In one embodiment, the coating assembly 21 further includes a scraper 213. The scraper 213 is connected to the storage member 211 and is used to scrape off the applied light-curing material.

[0045] When the coating mechanism 20 moves toward the first side W1 along the first direction X, one of the scraping members 213 of the two coating assemblies 21 scrapes off the residual photocurable material on the piece to be coated 1, and one of the two coating members 212 coats the photocurable material on the surface of the portion of the piece to be coated 1 where the residual photocurable material is scraped off.

[0046] When the coating mechanism 20 moves toward the second side W2 along the first direction X, the other of the scraping members 213 of the two coating assemblies 21 scrapes off the residual photocurable material on the part to be coated 1, and the other of the two coating members 212 coats the photocurable material on the surface of the part to be coated 1 where the residual photocurable material is scraped off.

[0047] In this way, the coating component 21 is composed of a scraper part 213 and a coating part 212, so that when the driving mechanism 30 drives the coating component 21 to move, the scraper part 213 and the coating part 212 can move synchronously, and before the coating part 212 of the coating component 21 applies the photocuring material to the part to be coated 1, the photocuring material on the part to be coated 1 is first cleaned by the scraper part 213, and then the photocuring material is applied to the part to be coated 1 by the coating part 212, so as to avoid the temperature or type of the residual photocuring material being different from the photocuring material to be coated, which may cause the performance of the subsequently coated photocuring material to change, thereby affecting the molding quality.

[0048] In this embodiment, the driving mechanism 30 includes a driving assembly 31 and a sliding member 32 . The driving assembly 31 is transmission-connected to the sliding member 32 for driving the sliding member 32 to slide along the first direction X. The two coating assemblies 21 are connected to the sliding member 32 .

[0049] The coating device 100 further includes a frame 40, and the frame 40 includes a top plate 41 and a plurality of support legs 42. The support legs 42 are arranged along the second direction Z, and the plurality of support legs 42 are connected to the bottom end surface of the top plate 41 and support the top plate 41. The driving assembly 31 includes a first driving member 311, a lead screw 312, and a threaded sliding sleeve 313. The lead screw 312 is arranged along the first direction X, and both ends of the lead screw 312 are rotatably connected to the top plate 41 through mounting plates. The first driving member 311 is a motor and is mounted on the top plate 41. The first driving member 311 is drivingly connected to the lead screw 312 to drive the lead screw 312 to rotate. The threaded sliding sleeve 313 is sleeved on the outer peripheral surface of the lead screw 312, and the threaded sliding sleeve 313 is in threaded cooperation with the lead screw 312 to drive the threaded sliding sleeve 313 to slide along the second direction Z through the rotation of the lead screw 312. The sliding member 32 is connected to the threaded sliding sleeve 313.

[0050] The number of the lead screws 312 is set to two, and the two lead screws 312 are arranged at intervals along the third direction Y. The number of the sliding members 32 is set to two, and the two sliding members 32 are arranged at intervals along the third direction Y. The coating mechanism 20 is located between the two sliding members 32. The two sliding members 32 are located between the two lead screws 312, and the two sliding members 32 are respectively connected to the threaded sliding sleeves 313 arranged on the two lead screws 312. The number of the first driving members 311 is set to two, and the two first driving members 311 respectively drive the two lead screws 312 to rotate.

[0051] Please also combine with Figures 2 to 5 , in an embodiment, the material storage member 211 is arranged along the third direction Y. The material storage member 211 is located between the two sliding members 32, and both ends of the material storage member 211 are respectively connected to the two sliding members 32. Along the first direction X, the scraping member 213 and the coating member 212 of the coating assembly 21 are connected to the same side of the material storage member 21, and the two scraping members 213 of the first coating assembly 23 and the second coating assembly 24 are located between the two coating members 212.

[0052] In this embodiment, along the first direction X, the first coating assembly 23 is located on the side of the second coating assembly 24 away from the first side W1. Along the first direction X, the scraping member 213 and the coating member 212 of the first coating assembly 23 are located on the side of the material storage member 211 to which they are connected and away from the second coating assembly 24, and the scraping member 213 and the coating member 212 of the second coating assembly 24 are located on the side of the material storage member 211 to which they are connected and away from the first coating assembly 23.

[0053] In this embodiment, a material storage cavity 2111 is formed in the material storage member 211, and a photocuring material is stored in the material storage cavity 2111. Along the first direction X, a material port 2112 is formed on the side of the material storage member 211 away from the other material storage member 211. The material port 2112 communicates with the material storage cavity 2111 so that the photocuring material can enter and exit the material storage cavity 2111 from the material port 2112.

[0054] Along the second direction Z, the scraping member 213 is provided at the edge of the material port 2112 away from the forming plate 50, and is used to guide the scraped photocuring material into the storage cavity 2111. In addition, the scraping member 213 can also guide the scraped photocuring material into the recovery tray for recovery. Along the second direction Z, the coating member 212 is provided at the edge of the material port 2112 close to the forming plate 50, and is used to guide the photocuring material in the storage cavity 2111 to leave the storage cavity 2111. Both the scraping member 213 and the coating member 212 can be connected to the storage member 211 by means of snap connection or the like, so as to facilitate the disassembly and assembly of the scraping member 213 and the coating member 212.

[0055] The scraping member 213 is inclined, and one end of the scraping member 213 is connected to the storage member 211, and the other end of the scraping member 213 is used to abut against the surface of the member 1 to be coated, so as to scrape off the residual photocuring material on the surface of the member 1 to be coated during the movement of the scraping member 213. The scraped photocuring material flows into the storage cavity 2111 along the scraping member 213 for recovery. Along the first direction X, the scraping member 213 extends upward and obliquely toward the side away from the other storage member 211 from the end where it is connected to the storage member 211.

[0056] Particularly, a plurality of scraping grooves 2130 are formed at the end of the scraping member 213 away from the storage member 211. The cross-sectional shape of the scraping groove 2130 is generally triangular, and along the inclined direction of the scraping member 213, the plurality of scraping grooves 2130 are arranged at intervals in sequence, so as to facilitate the scraping member 213 to better scrape off the photocuring material.

[0057] The coating member 212 is inclined, and the inclined direction of the coating member 212 is generally the same as the inclined direction of the scraping member 213. One end of the coating member 212 is connected to the storage member 211, and the other end of the coating member 212 is used to abut against the surface of the member 1 to be coated, so as to coat the residual photocuring material overflowing from the storage cavity 2111 on the surface of the member 1 to be coated during the movement of the coating member 212. The coating member 212 can be made of materials such as silica gel to avoid damaging the member 1 to be coated.

[0058] In this embodiment, when the coating mechanism 20 moves toward the first side W1 along the first direction X, the scraping member 213 of the second coating assembly 24 scrapes off the residual photocuring material on the member 1 to be coated, and the coating member 212 of the first coating assembly 23 coats the photocuring material on the surface of the area of the member 1 to be coated where the residual photocuring material has been scraped off.

[0059] When the coating mechanism 20 moves toward the second side W2 along the first direction X, the scraping member 213 of the first coating assembly 23 scrapes off the residual photocuring material on the member 1 to be coated, and the coating member 212 of the second coating assembly 24 coats the photocuring material on the surface of the area of the member 1 to be coated where the residual photocuring material has been scraped off.

[0060] In this way, when the coating member 212 of the first coating assembly 23 needs to coat the photocuring material in its corresponding storage member 211 on the surface of the member to be coated 1, the scraping member 213 of the second coating assembly 24 scrapes and recovers the residual photocuring material on the surface of the member to be coated 1, preventing the scraping member 213 of the first coating assembly 23 from scraping and recovering the residual other photocuring material into the storage member 211 of the first coating assembly 23, thus avoiding the mixing of two different photocuring materials and affecting subsequent printing.

[0061] Please further combine Figures 3 to 6 In an embodiment, the coating assembly 21 further includes a pumping member 214. The pumping member 214 is connected to the storage cavity 2111 and is used to inject the photocuring material into the storage cavity 2111 or extract the photocuring material in the storage cavity 2111.

[0062] Along the first direction X, injection ports 2114 are provided on the adjacent sides of the two storage members 211. One end of each injection port 2114 is connected to the storage cavity 2111, and the other end is connected to the pumping member 214. The pumping member 214 is a fluid pump, which can pump the photocuring material into the storage cavity 2111 or extract the photocuring material in the storage cavity 2111.

[0063] In this embodiment, the coating assembly 21 further includes a liquid level detection member configured to detect the liquid level of the photocuring material in the storage cavity 2111. The liquid level detection member can be an electronic component such as a liquid level sensor. Based on the liquid level signal of the photocuring material detected by the liquid level detection member, the pumping member 214 injects the photocuring material into the storage cavity 2111 or extracts the photocuring material in the storage cavity 2111, so that the liquid level of the photocuring material is higher than the position of the coating member to ensure that the photocuring material in the storage cavity 2111 can overflow along the coating member 212 and be coated on the surface of the member to be coated 1. When the liquid level of the photocuring material in the storage member 211 is lower than the position of the coating member 212, the coating member 212 does not perform the coating operation on the member to be coated 1, facilitating the control of whether the coating operations of the two coating assemblies 21 are carried out.

[0064] In this embodiment, the coating assembly 21 further includes a recovery member 216 and a recovery valve 215. The recovery member 216 is located between the two sliding members 32. Along the third direction Y, the two ends of the recovery member 216 are respectively connected to the two sliding members 32. Along the second direction Z, the recovery member 216 is located below the storage member 211, and a recovery cavity 2160 is provided on the side of the recovery member 216 facing the storage member 211. A recovery port 2113 is provided on the bottom end surface of the storage member 211, and the recovery port 2113 is connected to the storage cavity 2111. The photocuring material in the storage cavity 2111 can flow downward from the recovery port 2113 and fall into the recovery cavity 2160.

[0065] The recovery valve 215 is an electronic valve, which is arranged at the recovery port 2113 to control the on-off of the recovery port 2113 through the recovery valve 215. After the scraping member 213 completes the scraping operation and drains the scraped photocuring material to the storage cavity 2111, the electronic valve can be opened so that the photocuring material temporarily stored in the storage cavity 2111 can flow downward from the recovery port 2113 and fall into the recovery cavity 2160.

[0066] Please further combine with Figures 3 to 6 In one embodiment, when the driving mechanism 30 drives the coating mechanism 20 to move, the coating mechanism 20 is used to jack up the to-be-coated area of the to-be-coated part 1 to the side away from the forming plate 50. When the coating mechanism 20 moves to an area outside the to-be-coated area, the to-be-coated area falls back to contact the photocuring material coated on the to-be-coated area on the forming plate 50.

[0067] In this embodiment, when the driving mechanism 30 drives the coating mechanism 20 to move, the coating mechanism 20 can jack up the to-be-coated area of the to-be-coated part 1 along the second direction Z to the side away from the forming plate 50. When the coating of the to-be-coated area is completed, the coating mechanism 20 moves to an area outside the to-be-coated area of the to-be-coated part 1, and the to-be-coated area falls back under its own gravity to contact the photocuring material coated thereon on the forming plate 50, so that a layer of photocuring material coated on the to-be-coated area can fall on the forming plate 50 to form a photocuring layer. Subsequently, the photocuring layer is cured and formed through methods such as light irradiation. After the photocuring layer is cured and formed, it can be detached from the to-be-coated part 1, so as to facilitate the subsequent coating of the photocuring material on the to-be-coated part 1.

[0068] The completion of the coating of the above-mentioned to-be-coated area means that the coating parameters such as the coating area and shape of the photocuring material coated on the to-be-coated area reach the preset standard.

[0069] It should be noted that after the photocuring layer is cured and formed and detached from the to-be-coated part 1, there will be some incompletely cured photocuring material remaining on the to-be-coated part 1. In order to avoid the remaining photocuring material affecting the next photocuring layer, it is necessary to scrape off the remaining photocuring material on the to-be-coated part 1 through the scraping member 213 before coating the next photocuring layer.

[0070] In this embodiment, the coating assembly 21 further includes a pressing plate 217. Along the first direction X, the pressing plate 217 is located on the side of the scraping member 213 away from the storage member 211. The pressing plate 217 is located between the two sliding members 32. Along the third direction Y, the two ends of the pressing plate 217 are respectively connected to the two sliding members 32. The pressing plate 217 extends obliquely from its end close to the scraping member 213 towards the side of the forming plate 50 and away from the scraping member 213, and at least part of the to-be-coated part 1 is clamped between the pressing plate 217 and the adjacent scraping member 213 and coating member 212.

[0071] Further, the coating assembly 21 further includes a first guiding member 218. The first guiding member 218 is arranged along the third direction Y and is located between two sliding members 32. Along the third direction Y, both ends of the first guiding member 218 are rotatably connected to the two sliding members 32 respectively. Along the first direction X, the first guiding members 218 of the first coating assembly 23 and the second coating assembly 24 are located between two pressing plates 217, and the two first guiding members 218 are configured to support the area of the workpiece 1 to be coated between the two pressing plates 217, and the first guiding member 218 also plays a guiding role for the area of the workpiece 1 to be coated supported by it.

[0072] The workpiece 1 to be coated is arranged along the first direction X. One end of the workpiece 1 to be coated is pulled to pass through the area between the pressing plate 217 of the first coating assembly 23, the scraping member 213 and the coating member 212. The workpiece 1 to be coated is closely attached to the surface of the pressing plate 217 and pulled above the two first guiding members 218. After the workpiece 1 to be coated bypasses the two first guiding members 218, the workpiece 1 to be coated is then pulled to pass through the area between the pressing plate 217 of the second coating assembly 24, the scraping member 213 and the coating member 212, so that the workpiece 1 to be coated clamped by the mounting mechanism 10 is generally in an isosceles trapezoid shape.

[0073] The coating assembly 21 further includes a third guiding member 219. The third guiding member 219 is arranged in parallel with the first guiding member 218. Along the inclined direction of the pressing plate 217, the third guiding member 219 is located below the pressing plate 217. The workpiece 1 to be coated is pulled to cross over the third guiding member 219 and then pulled to the pressing plate 217 to support the workpiece 1 to be coated through the third guiding member 219.

[0074] In this way, when the coating mechanism 20 moves along the first direction X towards the first side W1, the scraping member 213 and the coating member 212 of the second coating assembly 24 lift the workpiece 1 to be coated along the pressing plate 217. And during the process of the scraping member 213 lifting the workpiece 1 to be coated, the scraping member 213 scrapes off the residual photocuring material on the workpiece 1 to be coated. Scraping off the photocuring material while the scraping member 213 lifts the workpiece 1 to be coated can ensure the pressing effect of the workpiece 1 to be coated on the scraping member 213 by increasing the acting force between the workpiece 1 to be coated and the scraping member 213, thereby improving the scraping effect of the photocuring material. Subsequently, the first coating assembly 23 moves to pass through the area of the workpiece 1 to be coated where the photocuring material has just been scraped off. The workpiece 1 to be coated falls back under the action of the pressing plate 217 of the first coating assembly 23 and its own gravity, so that the workpiece 1 to be coated is pressed against the coating member 212 of the first coating assembly 23, thereby improving the coating effect of the coating member 212.

[0075] It should be noted that the inclination directions of the two scraping members 213 based on the first coating assembly 23 and the second coating assembly 24 are opposite. When the coating mechanism 20 moves along the first direction X towards the first side W1, even when the scraping member 213 of the first coating assembly 23 scrapes the photocuring material that the second coating assembly 24 has not completely scraped off on the workpiece to be coated 1, the photocuring material will not enter the storage member 211 of the first coating assembly 23.

[0076] In this embodiment, the coating mechanism 20 further includes two light-transmitting members 22, and the light-transmitting members 22 can be made of materials such as glass. Along the first direction X, one light-transmitting member 22 is located on the side of the first coating assembly 23 away from the second coating assembly 24, and the other light-transmitting member 22 is located on the side of the second coating assembly 24 away from the first coating assembly 23. Both light-transmitting members 22 are located between the two sliding members 32, and both ends of the light-transmitting member 22 are respectively connected to the two sliding members 32, so that the light-transmitting member 22 can move along the first direction X with the sliding members 32.

[0077] The light-transmitting member 22 has a light-transmitting area and a non-light-transmitting area, and the shapes and coverage areas of the light-transmitting area and the non-light-transmitting area can be designed according to the shape of the workpiece to be printed, so that light can only pass through the light-transmitting member 22 from the light-transmitting area and then irradiate onto the photocuring layer on the forming plate 50 to print a photocuring layer with the required shape.

[0078] In this way, during the process of the coating mechanism 20 moving along the first direction X towards the first side W1, when the first coating assembly 23 completes the coating operation, the light-transmitting member 22 located on the side of the first coating assembly 23 close to the second side W2 moves above the workpiece to be coated 1 coated with the photocuring material and presses the workpiece to be coated 1 onto the forming plate 50, thereby improving the tightness of the contact between the photocuring layer coated on the workpiece to be coated 1 and the forming plate 50.

[0079] Please also combine Figure 7 and refer to Figure 4 In an embodiment, the coating mechanism 20 further includes a blowing assembly 25. The blowing assembly 25 is connected to the sliding member 32, and the blowing assembly 25 is located between the two coating assemblies 21, and the blowing assembly 25 is configured to blow air towards the forming plate 50.

[0080] The air blowing assembly 25 includes an air pipe 251 and an air pump (not shown). The air pipe 251 is a hollow tube. The air pump is connected to the air pipe 251 to inject air into the air pipe 251. The air pipe 251 is arranged along the third direction Y and is located between the two sliding members 32. The two ends of the air pipe 251 are respectively connected to the two sliding members 32. Along the second direction Z, the bottom end of the air pipe 251 is provided with an air blowing port 2510. The air injected into the air pipe 251 by the air pump is blown toward the forming plate 50 through the air blowing port 2510. As the air pipe 251 slides back and forth with the sliding member 32, it can blow away any residual light-curing material on the forming plate 50, thereby cleaning the forming plate 50.

[0081] In particular, the air port 2510 is a narrow strip-shaped port, and the air port 2510 extends along the third direction Y to increase the pressure of the air flow blown out from the air port 2510. The pressure of the air flow blown out from the air port 2510 is not less than 120kPa to ensure the cleaning effect.

[0082] Please combine again Figure 2 and Figure 3 In one embodiment, the mounting mechanism 10 includes a clamping assembly 11 and a retracting assembly 12. The clamping assembly 11 and the retracting assembly 12 are spaced apart along a first direction X. The clamping assembly 11 is configured to clamp one end of the article to be coated 1. The mounting mechanism 10 includes a tension detection member 110, which is connected to the clamping assembly 11. The tension detection member 110 may be a strain gauge, so that the tension of the article to be coated 1 is detected by the tension detection member 110.

[0083] It is understandable that the specific structure and installation position of the tension detection member 110 can be selected according to actual design requirements, as long as the tension detection member 110 can detect the tension of the coating member 1.

[0084] The retractable assembly 12 includes a second driving member 121 and a retractable member 122. The other end of the article 1 to be coated is wound around the outer circumference of the retractable member 122. The second driving member 121 is in transmission connection with the retractable member 122 to drive the retractable member 122 to rotate. The retractable member 122 is a shaft member and is arranged along the third direction Y. One end of the retractable member 122 is rotatably connected to the support leg 42, and the other end of the retractable member 122 is connected to the driving end of the second driving member 121. The second driving member 121 is a device such as a motor. The second driving member 121 drives the retractable member 122 to rotate, thereby driving the article 1 to be coated, which is wound around the retractable member 122, to continue to be wound around the retractable member 122 or to be unwound from the retractable member 122. The tension of the article 1 to be coated is adjusted based on the tension of the article 1 to be coated detected by the tension detection member 110 to ensure the coating effect of the coating article 212.

[0085] In this embodiment, the installation mechanism 10 further includes a guiding component 13, and the guiding component 13 includes a second guiding member 132 and a sliding seat 131. The number of sliding seats 131 is set to two, and the two sliding seats 131 are arranged at intervals along the third direction Y. The second guiding member 132 is arranged along the third direction Y, and the member to be coated 1 is wound around the second guiding member 132 to support and guide the member to be coated 1 through the second guiding member 132. The second guiding member 132 is located between the two sliding seats 131, and both ends of the second guiding member 132 are rotatably connected to the two sliding seats 131 respectively. Along the second direction Z, both sliding seats 131 are slidably connected to the support leg 42 to adjust the height of the second guiding member 132 in the second direction Z.

[0086] The number of guiding components 13 is set to two. Along the second direction Z, one guiding component 13 is located above the clamping component 11, and the other guiding component 13 is located above the winding and unwinding component 12, so that both ends of the member to be coated 1 respectively bypass the two second guiding members 132 and are then respectively installed on the clamping component 11 and the winding and unwinding component 12.

[0087] As Figure 1 and Figure 2 shown, and in combination with Figure 8 and Figure 9 This embodiment further provides a 3D printer 200, including a light source component 60, a forming plate 50, and the above-mentioned coating device 100. The light source component 60 is used to emit curing light for curing the photocuring material. Along the second direction Z, the forming plate 50 is arranged on one side of the coating device 100 away from the light source component 60. The forming plate 50 is used to contact the photocuring material coated on the member to be coated 1 to receive the cured photocuring material.

[0088] Along the second direction Z, the light source component 60 is installed on the top end surface of the top plate 41. The light source component 60 includes a dust-proof cover 61, a laser emitter 63, a cooling fan 62, and a focal length adjusting member 64. The dust-proof cover 61 is connected to the top end surface of the top plate 41. The laser emitter 63 is arranged in the dust-proof cover 61, and the laser emitter 63 emits laser along the second direction Z towards the member to be coated 1. A light-transmitting opening 410 is formed on the top plate 41, and the laser emitted by the laser emitter 63 can pass through the light-transmitting opening 410 and then be emitted onto the photocuring layer coated on the member to be coated 1. The cooling fan 62 is installed on the dust-proof cover 61 to cool the environment inside the dust-proof cover 61. The focal length adjusting member 64 can adjust the focal length of the laser emitter 63 to ensure the curing effect.

[0089] The 3D printer 200 further includes a lifting assembly 70, and the lifting assembly 70 includes a lifting driving member 71 and a lifting plate 72. The lifting driving member 71 can be a device such as a lead screw lifting mechanism. The lifting driving member 71 is drivingly connected to the lifting plate 72 to drive the lifting plate 72 to lift along the second direction Z. The forming plate 50 is connected to the lifting plate 72 to drive the forming plate 50 to lift along the second direction Z through the lifting plate 72, so as to adjust the distance between the forming plate 50 and the workpiece to be coated 1. After the curing of one layer of the photocuring layer is completed, the forming plate 50 descends to the distance corresponding to the thickness of the next layer of the photocuring layer, so as to continue the printing operation of the next layer of the photocuring layer.

[0090] The printing process of the present application will be described below (taking the photocuring material in the first coating assembly 23 as the material required for the first layer of the printed layer): First, a zeroing and leveling operation is performed on the forming plate 50, and then the coating mechanism 20 is driven by the driving mechanism 30 to move along the first direction X towards the first side W1. During this process, the scraping member 213 of the second coating assembly 24 will scrape off the residual photocuring material on the workpiece to be coated 1 and recycle it into the storage member 211, and the photocuring material recycled in the storage member 211 can be pumped out through the pumping member 214 to maintain the liquid level of the photocuring material in the storage member 211. The coating member 212 of the first coating assembly 23 will coat the photocuring material in its corresponding storage member 211 on the surface of the workpiece to be coated 1. When the coating mechanism 20 moves to the farthest distance towards the first side W1, the first coating assembly 23 completes the coating operation. At this time, the light-transmitting member 22 corresponding to the first coating assembly 23 moves above the forming plate 50 and presses the workpiece to be coated 1 against the forming plate 50. Subsequently, the light source assembly 60 starts to work to cure and form the photocuring layer located between the workpiece to be coated 1 and the forming plate 50.

[0091] After the photocuring layer is cured and formed, the forming plate 50 descends to a distance corresponding to the thickness of the next photocuring layer, and the cured and formed photocuring layer falls off the workpiece to be coated 1 and lies on the forming plate 50. Subsequently, the driving mechanism 30 drives the coating mechanism 20 to move along the first direction X towards the second side W2. During this process, the scraping member 213 of the first coating assembly 23 scrapes the residual photocuring material on the workpiece to be coated 1 and recovers it into the storage member 211, and the photocuring material recovered in the storage member 211 can be pumped out through the pumping member 214 to maintain the liquid level of the photocuring material in the storage member 211. The pumping member 214 of the second coating assembly 24 injects the photocuring material into the storage member 211 to maintain the liquid level, and the coating member 212 coats the photocuring material injected into the storage member 211 on the surface of the workpiece to be coated 1. When the coating mechanism 20 moves to the farthest distance towards the second side W2, the second coating assembly 24 completes the coating operation. At this time, the light-transmitting member 22 corresponding to the second coating assembly 24 moves above the forming plate 50 and presses the workpiece to be coated 1 onto the forming plate 50. Subsequently, the light source assembly 60 starts to work, causing the photocuring layer located between the workpiece to be coated 1 and the forming plate 50 to be cured and formed.

[0092] In this way, the 3D printer 200 of the present application can not only print different printing layers formed by different types of consumables, but also print structures formed by two different types of consumables on the same printing layer, thereby improving the diversity of printed parts. Moreover, in the coating device 100 and the 3D printer 200 of this embodiment, the photocuring material is coated on the workpiece to be coated 1 when the coating mechanism 20 moves, rather than first placing the photocuring material on the workpiece to be coated 1 and then spreading it evenly, which can improve the efficiency.

[0093] In the above text, the specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. A coating device, characterized in that, The coating device includes: a mounting mechanism configured to mount the workpiece to be coated; a coating mechanism including at least two coating components. The at least two coating components include a first coating component and a second coating component arranged along a first direction. Each coating component includes a material storage member and a coating member. The coating member is configured to coat the photocuring material stored in the material storage member on the surface of the workpiece to be coated; a driving mechanism drivingly connected to the coating mechanism for driving the coating mechanism to reciprocate between a first side and a second side along the first direction.

2. The coating device according to claim 1, wherein, The coating component further includes a scraping member connected to the material storage member for scraping the coated photocuring material.

3. The coating device according to claim 2, characterized in that The two scraping members of the first coating component and the second coating component are located between the two coating members.

4. The coating device according to claim 2, characterized in that, The coating component further includes a pressing plate which is located on a side of the scraping member away from the material storage member along the first direction.

5. The coating device according to claim 4, wherein, The coating component further includes a first guiding member. Along the first direction, the first guiding members of the first coating component and the second coating component are located between the two pressing plates.

6. The coating device according to claim 4, characterized in that, A material storage cavity is formed in the material storage member. Along the first direction, a material opening is formed in a side of the material storage member of the first coating component and the second coating component away from the other material storage member. The material opening communicates with the material storage cavity.

7. The coating device according to claim 6, characterized in that Along a second direction intersecting with the first direction, the scraping member is disposed at an edge of the material opening away from the forming plate, and the coating member is disposed at an edge of the material opening close to the forming plate; or The coating component further includes a pumping member communicating with the material storage cavity for injecting the photocuring material into the material storage cavity or pumping the photocuring material out of the material storage cavity; or The coating component further includes a liquid level detecting member configured to detect the liquid level of the photocuring material in the material storage cavity.

8. The coating device according to claim 1, characterized in that, The driving mechanism includes a driving component and a sliding member. The driving component is drivingly connected to the sliding member for driving the sliding member to slide along the first direction. The first coating component and the second coating component are connected to the sliding member.

9. The coating device according to claim 8, wherein, The coating mechanism further includes a blowing component connected to the sliding member and configured to blow air towards the forming plate.

10. The coating device according to claim 1, characterized in that, The mounting mechanism includes a clamping component configured to clamp one end of the workpiece to be coated.

11. The coating device according to claim 10, characterized in that, The mounting mechanism includes a tension detecting member connected to the clamping component.

12. A 3D printer, characterized in that, including: a light source component for emitting curing light for curing the photocuring material; the coating device according to any one of claims 1 to 11; and a forming plate which is disposed on a side of the coating device away from the light source component along the second direction and is used to contact the photocuring material coated on the workpiece to be coated to receive the cured photocuring material.

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