Additive manufacturing device

Abstract

The embodiment of the present invention provides an additive manufacturing device, which includes: a machine body, a plurality of feeding mechanisms, a cantilever mechanism and an exposure mechanism; the plurality of feeding mechanisms are respectively used to supply different materials, the feeding mechanism includes a loading platform provided on the machine body and having a first plane on the top, and a feeding head suspended above the loading platform, the feeding head is used to form a material layer with a desired shape on the first plane; the cantilever mechanism is movably provided on the machine body, the cantilever mechanism is connected to a forming table, and can move the forming table above the loading platform so that the second plane on the forming table is opposite to the first plane and in contact with the material layer; the exposure mechanism is provided below the loading platform, and is used to irradiate the material layer through the loading platform so that the irradiated material layer is solidified on the second plane. The additive manufacturing device can compound multiple materials in the same layer.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of additive manufacturing technology, and in particular to an additive manufacturing device. Background Art

[0002] Additive manufacturing, also known as 3D printing, is a type of rapid prototyping technology. It is a technology that constructs objects by printing layer by layer based on digital model files. It has been widely used in many fields. However, existing additive manufacturing devices can usually only perform multi-material composites in the layering direction, and cannot perform multi-material composites within a single layer. Summary of the invention

[0003] In view of the above problems existing in the prior art, an embodiment of the present invention provides an additive manufacturing device capable of performing composite of multiple materials in a single layer.

[0004] To solve the above problems, the technical solution provided by the embodiment of the present invention is:

[0005] An additive manufacturing device, comprising:

[0006] Body;

[0007] A plurality of feeding mechanisms, each of which is used to feed different materials, wherein the feeding mechanism comprises a loading platform provided on the machine body and having a first plane on the top, and a feeding head suspended above the loading platform, wherein the feeding head is used to form a material layer having a desired shape on the first plane;

[0008] a cantilever mechanism, which is movably arranged on the machine body, the cantilever mechanism is connected to a forming table, and is capable of moving the forming table above the loading table so that a second plane on the forming table is opposite to the first plane and in contact with the material layer;

[0009] The exposure mechanism is arranged below the material loading platform and is used for irradiating the material layer through the material loading platform so that the irradiated material layer is cured on the second plane.

[0010] In some embodiments, a first guide rail assembly is provided on the machine body, the cantilever mechanism is connected to the machine body via the first guide rail assembly, a plurality of the feeding mechanisms are located on the same side of the first guide rail assembly, and the plurality of the feeding mechanisms are arranged in sequence along the moving direction of the cantilever mechanism on the first guide rail assembly and are at the same distance from the first guide rail assembly.

[0011] In some embodiments, the loading platform includes a first annular frame, a second annular frame, a release film assembly and a light-transmitting plate, the second annular frame is arranged on the machine body, the release film assembly includes an annular frame assembly and a release film, the peripheral portion of the release film is connected to the annular frame assembly and tensioned in the annular frame assembly, the annular frame assembly is placed on the second annular frame, the first annular frame is arranged on the top of the annular frame assembly and cooperates with the second annular frame to clamp the annular frame assembly; the light-transmitting plate is placed at the bottom of the release film and fits with the release film to form the first plane.

[0012] In some embodiments, the loading platform also includes a material box with an open top, the top of the material box forms the second annular frame, the bottom surface of the material box has a first through hole, and a cylindrical first protrusion extends upward from the edge of the first through hole, the light-transmitting plate cover is arranged on the top of the first protrusion, the first protrusion protrudes out of the open top of the material box to lift the release film, so that the release film and the first annular frame together form a material receiving groove surrounding the light-transmitting plate, and the release film is provided with a leakage hole connecting the material receiving groove and the material box.

[0013] In some embodiments, the feed head is connected to the machine body via a first three-axis moving mechanism, so that the feed head is driven to move via the first three-axis moving mechanism and form the material layer having a desired shape on the first plane.

[0014] In some embodiments, the feeding mechanism further comprises:

[0015] The scraper assembly is used to scrape away the residual material on the first plane.

[0016] In some embodiments, the scraper assembly comprises:

[0017] Two tool holder assemblies, which are respectively arranged on opposite sides of the loading platform;

[0018] A scraper, which is located above the material loading platform, and two ends of the scraper are respectively connected to the two tool holder assemblies;

[0019] The first driving device is drivingly connected to the two tool holder assemblies, and is used for driving the two tool holder assemblies to move synchronously, and driving the scraper to sweep across the first plane to scrape off residual materials.

[0020] In some embodiments, the tool holder assembly comprises:

[0021] A tool holder seat, which is arranged on the machine body and is drivingly connected to the first driving device;

[0022] A tool holder slider is slidably connected to the tool holder seat, and the end of the scraper is connected to the tool holder slider;

[0023] The first adjusting component is used to drive the tool holder slider to move in a vertical direction to adjust the height of the end of the scraper.

[0024] In some embodiments, the tool holder assembly further comprises:

[0025] A rotating block rotatably connected to the tool holder slider, and an end of the scraper is connected to the rotating block;

[0026] The second adjusting component is used to drive the rotating block to rotate so as to adjust the inclination angle of the scraper relative to the first plane.

[0027] In some embodiments, the scraper comprises:

[0028] A blade body, which is in a strip shape, with connecting parts for connecting to the blade holder assembly at both ends of the blade body;

[0029] A flexible scraping and sweeping component is arranged at the bottom of the blade body and extends along the length direction of the blade body. The flexible scraping and sweeping component at least partially protrudes from the bottom surface of the blade body.

[0030] In some embodiments, the cantilever mechanism comprises:

[0031] A first bracket, which is movably arranged on the machine body, and a second guide rail assembly arranged in a vertical direction is provided on the first bracket;

[0032] The cantilever is connected to the first bracket through the second guide rail assembly so as to drive the forming table to move in a vertical direction.

[0033] In some embodiments, the cantilever is connected to the forming table through an adjustment plate, and the cantilever is connected to the adjustment plate through multiple first bolt groups, and the multiple first bolt groups are respectively connected to different positions on the adjustment plate, and the first bolt groups are used to adjust the distance between the cantilever and the corresponding positions on the adjustment plate to adjust the angle of the adjustment plate relative to the first plane.

[0034] In some embodiments, the cantilever is provided with a plurality of hole groups corresponding one-to-one to the first bolt group, the hole group includes a first optical hole and a first screw hole, and the adjustment plate is provided with a plurality of second screw holes corresponding one-to-one to the first optical hole; the first bolt group includes a tightening bolt and a pushing bolt, the tightening bolt passes through the first optical hole and is threadedly connected to the second screw hole; the pushing bolt is threadedly connected to the first screw hole, and passes through the first screw hole to abut against the adjustment plate.

[0035] In some embodiments, the exposure mechanism comprises:

[0036] A third guide rail assembly is arranged below the loading platform;

[0037] A first connecting plate, which is movably connected to the third guide rail assembly;

[0038] A plurality of light generators are connected to the first connecting plate, and the plurality of light generators are respectively used to project different types of light beams to the loading platform, and the plurality of light generators have the same light beam projection position and projection angle when they are respectively moved under the same loading platform.

[0039] In some embodiments, a first groove is provided on the top surface of the first connecting plate, a second connecting plate is provided in the first groove, the light generator is connected to the second connecting plate, the first connecting plate and the second connecting plate are connected by a plurality of second bolt groups, the second bolt groups penetrate the groove wall of the first groove from the side edge of the first connecting plate and are connected to the side edge of the second connecting plate, and the plurality of second bolt groups are respectively connected to different positions of the side edge of the second connecting plate, and are used to adjust the distance between the groove wall of the first groove and the side edge of the first connecting plate at the corresponding position, so as to adjust the position of the second connecting plate on the first connecting plate.

[0040] In some embodiments, the exposure mechanism also includes a third connecting plate arranged opposite to the second connecting plate, the light generator is connected to the third connecting plate, and the third connecting plate and the second connecting plate are connected by a plurality of third bolt groups, and the plurality of third bolt groups are respectively connected to different positions of the third connecting plate, so as to adjust the distance between the third connecting plate and the second connecting plate at the corresponding positions, so as to adjust the angle of the third connecting plate relative to the second connecting plate.

[0041] In some embodiments, the additive manufacturing device further includes a cleaning mechanism and a drying device disposed on the machine body, wherein the cleaning mechanism is used to clean the material layer solidified on the forming table; and the drying device is used to dry the cleaned material layer.

[0042] In some embodiments, the cleaning mechanism comprises:

[0043] A first protective cover is arranged on the machine body, and a top of the first protective cover has a first opening;

[0044] A nozzle assembly is connected to the machine body via a second three-axis moving mechanism. The nozzle assembly extends into the first protective cover from the side to clean the material layer extending into the first protective cover through the first opening from bottom to top.

[0045] In some embodiments, the spray head assembly includes:

[0046] A nozzle body connected to the second three-axis moving mechanism, wherein the top surface of the nozzle body is provided with a second groove, and the bottom of the second groove is provided with a second through hole penetrating the nozzle body;

[0047] A plurality of nozzles include a first nozzle arranged at the bottom of the groove, and a plurality of second nozzles arranged around the first nozzle, the spraying direction of the first nozzle faces the first opening, and the spraying directions of the plurality of second nozzles converge toward the middle.

[0048] In some embodiments, the drying device comprises:

[0049] A second protective cover having a second opening at the top thereof;

[0050] The hot air component is arranged in the second protective cover and is used for guiding the air flow and heating the air flow so as to dry the material layer extending into the second protective cover through the second opening.

[0051] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0052] In the additive manufacturing device of the embodiment of the present invention, multiple feeding mechanisms are used to supply different materials respectively. The cantilever mechanism can drive the forming table to move above the loading platform of each feeding mechanism, and solidify the material layers formed by the corresponding materials on the second plane respectively, so as to achieve the purpose of compounding multiple materials in the same layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of an additive manufacturing device according to an embodiment of the present invention;

[0054] Figure 2 It is a structural schematic diagram of a feeding mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0055] Figure 3 It is a schematic diagram of a process of solidifying a material layer on a second plane by an additive manufacturing device according to an embodiment of the present invention;

[0056] Figure 4 It is a schematic structural diagram of a cantilever mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0057] Figure 5 A partial structural schematic diagram of a cantilever mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of the connection between a cantilever and an adjustment plate of an additive manufacturing device according to an embodiment of the present invention;

[0059] Figure 7 A schematic structural diagram of an embodiment of a material loading platform of an additive manufacturing device according to an embodiment of the present invention;

[0060] Figure 8 An exploded view of an embodiment of a material loading platform of an additive manufacturing device according to an embodiment of the present invention;

[0061] Fig. 9 An exploded view of a release film assembly of an additive manufacturing device according to an embodiment of the present invention;

[0062] Fig.10 It is a structural schematic diagram of another embodiment of a material loading platform of an additive manufacturing device according to an embodiment of the present invention;

[0063] Fig.11 A cross-sectional view of another embodiment of a material loading platform of an additive manufacturing device according to an embodiment of the present invention;

[0064] Fig.12 An exploded view of another embodiment of a material loading platform of an additive manufacturing device according to an embodiment of the present invention;

[0065] Fig.13 It is a structural schematic diagram of a tool holder assembly of an additive manufacturing device according to an embodiment of the present invention;

[0066] Fig.14 An exploded view of a tool holder assembly of an additive manufacturing device according to an embodiment of the present invention;

[0067] Fig.15 is a cross-sectional view of a tool holder assembly of an additive manufacturing device according to an embodiment of the present invention;

[0068] Fig.16 A schematic structural diagram of a scraper of an additive manufacturing device according to an embodiment of the present invention;

[0069] Fig.17 It is a schematic structural diagram of an exposure mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0070] Fig.18 It is a partial structural schematic diagram of an exposure mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0071] Fig.19 is a cross-sectional view of an exposure mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0072] Fig. 20 It is a structural schematic diagram of a cleaning mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0073] Fig.21 It is a partial structural schematic diagram of a cleaning mechanism of an additive manufacturing device according to an embodiment of the present invention;

[0074] Fig. 22 It is a structural schematic diagram of a nozzle assembly of an additive manufacturing device according to an embodiment of the present invention;

[0075] Fig.23 It is a schematic structural diagram of a drying device of an additive manufacturing device according to an embodiment of the present invention.

[0076] Description of reference numerals:

[0077] 100-body; 110-first guide rail assembly;

[0078] 200-feeding mechanism;

[0079] 210-loading platform; 211-release film assembly; 2111-ring frame assembly; 2112-release film; 2113-third ring frame; 2114-fourth ring frame; 2115-leakage hole; 2116-receiving slot; 212-first ring frame; 213-second ring frame; 214-light-transmitting plate; 2141-first plane; 215-material box; 2151-first through hole; 2152-first protrusion;

[0080] 220-feeding head; 221-first three-axis moving mechanism;

[0081] 230-scraper assembly; 231-tool holder assembly; 2311-tool holder seat; 2312-tool holder slider; 2313-first bolt; 2314-second bolt; 2315-first slot; 2316-first rib; 2317-second slot; 2318-rotating block; 2319-pivot; 2320-pivot hole; 2321-third bolt; 2322-fourth bolt; 2323-fixed block; 2324-fifth bolt; 2325-second rib; 233-scraper; 2331-tool body; 2332-flexible scraping component; 2333-third slot; 2334-connecting part; 234-first driving device;

[0082] 300-cantilever mechanism; 310-first bracket; 320-cantilever; 321-first light hole; 322-first screw hole; 330-second guide rail assembly; 340-adjusting plate; 341-second screw hole; 350-forming table; 351-second plane; 360-first bolt group; 361-tightening bolt; 362-thrust bolt;

[0083] 400-exposure mechanism; 410-third guide rail assembly; 420-first connecting plate; 421-first groove; 430-light generator; 440-second connecting plate; 450-second bolt group; 460-third connecting plate; 470-third bolt group;

[0084] 500-cleaning mechanism; 510-first protective cover; 511-first opening; 520-spray head assembly; 521-spray head body; 5211-second groove; 5212-second through hole; 522-first nozzle; 523-second nozzle; 530-second three-axis moving mechanism; 540-water baffle; 550-container;

[0085] 600-drying device; 610-second protective cover; 611-second opening; 620-hot air assembly;

[0086] 710 - first material layer; 720 - second material layer. DETAILED DESCRIPTION

[0087] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0088] See also Figures 1 to 3 As shown, an embodiment of the present invention provides an additive manufacturing device, which includes a body 100, a plurality of feeding mechanisms 200, a cantilever mechanism 300 and an exposure mechanism 400, wherein the plurality of feeding mechanisms 200 are respectively used to supply different materials, and the feeding mechanism 200 includes a loading platform 210 which is arranged on the body 100 and has a first plane 2141 on the top, and a feeding head 220 suspended above the loading platform 210, and the feeding head 220 is used to form a material layer with a desired shape on the first plane 2141; the cantilever mechanism 300 is movably arranged on the body 100, and the cantilever mechanism 300 is connected to a forming table 350, and can move the forming table 350 above the loading platform 210, so that the second plane 351 on the forming table 350 is opposite to the first plane 2141 and contacts with the material layer; the exposure mechanism 400 is arranged below the loading platform 210, and is used to irradiate the material layer through the loading platform 210, so that the irradiated material layer is solidified on the second plane 351.

[0089] In the additive manufacturing device adopting the above structure, multiple feeding mechanisms 200 are used to supply different materials respectively. The cantilever mechanism 300 can drive the forming table 350 to move above the loading platform 210 of each feeding mechanism 200, and solidify the material layers formed by the corresponding materials on the second plane 351 respectively, so as to achieve the purpose of compounding multiple materials in the same layer.

[0090] For example, a first material can be extruded on a loading platform 210 of a feeding mechanism 200 to form a first material layer 710, the cantilever mechanism 300 moves the forming platform 350 to the top of the loading platform 210, and the first material layer 710 is cured on the second surface by the exposure mechanism 400, as shown in FIG. Figure 3As shown in FIG. 1 , a second material is then extruded on the loading platform 210 of another feeding mechanism 200 to form a second material layer 720. The cantilever mechanism 300 moves the forming platform 350 to the top of the other loading platform 210, and the second material layer 720 is solidified on the second surface by the exposure mechanism 400, as shown in FIG. Figure 3 As shown in (b), by controlling the position and expected properties of the material layers, multiple materials can be composited in the same layer.

[0091] The specific structure and principle of the additive manufacturing device according to the embodiment of the present invention are described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0092] In some embodiments, the body 100 may be a frame structure assembled from profiles, a first table top may be formed on the top of the body 100, and a second table top may be formed below the first table top, wherein the feeding mechanism 200 and the cantilever mechanism 300 may be arranged on the first table top, and the exposure mechanism 400 may be arranged on the second table top, so that the exposure mechanism 400 is arranged below the loading table 210 of the feeding mechanism 200, so that the exposure mechanism 400 can irradiate the loading table 210 from bottom to top.

[0093] In some embodiments, a first guide rail assembly 110 is provided on the machine body 100, the cantilever mechanism 300 is connected to the machine body 100 through the first guide rail assembly 110, a plurality of feeding mechanisms 200 are located on the same side of the first guide rail assembly 110, and the plurality of feeding mechanisms 200 are arranged in sequence along the moving direction of the cantilever mechanism 300 on the first guide rail assembly 110. For example, a coordinate system is constructed with the X-axis and the Y-axis parallel to the first plane 2141, and the Z-axis perpendicular to the first plane 2141, as shown in FIG. Figure 1 As shown, the first guide rail assembly 110 can extend along the X-axis direction, and the multiple feeding mechanisms 200 are located on the same side of the first guide rail assembly 110 and are arranged in sequence along the X-axis direction. In this way, the cantilever mechanism 300 only needs to drive the forming table 350 to move on the same side of the first guide rail assembly 110 and pass through the multiple feeding mechanisms 200 in sequence, so as to be able to compound multiple materials on the same layer, which is beneficial to shorten the movement stroke of the cantilever mechanism 300 and simplify the structure of the cantilever mechanism 300.

[0094] In a preferred embodiment, the distances between the multiple feeding mechanisms 200 and the first guide rail assembly 110 are equal, that is, the multiple feeding mechanisms 200 have the same coordinates on the Y-axis. In this way, the cantilever mechanism 300 does not need to adjust the position of the forming table 350 on the Y-axis, which is beneficial to further simplify the structure of the cantilever mechanism 300.

[0095] In a specific implementation, the first guide rail assembly 110 may include a guide rail, a slider, a drive motor, a screw assembly and a position sensor. The guide rail is laid along the X-axis direction. Preferably, a plurality of guide rails parallel to each other may be laid. The slider is slidably connected to the guide rail. The screw assembly is also arranged along the X-axis direction. The drive motor is connected to the slider through the screw assembly. The cantilever mechanism 300 is arranged on the slider. The position sensor is arranged on the guide rail for detecting the position of the slider on the guide rail. The drive motor and the position sensor can be connected to the controller (not shown in the figure) of the additive manufacturing device. In this way, under the control of the controller, the drive motor can drive the slider to move along the X-axis direction through the screw assembly, and then drive the forming table 350 to move along the X-axis direction through the cantilever mechanism 300 and pass through each feeding mechanism 200 in sequence.

[0096] Cooperate Figure 4 As shown, in some embodiments, the cantilever mechanism 300 may include a first bracket 310 and a cantilever 320. The first bracket 310 is arranged on a slider of the first guide rail assembly 110 so as to be able to move along the X-axis direction relative to the body 100. The first bracket 310 is provided with a second guide rail assembly 330 arranged along the vertical direction; the cantilever 320 is connected to the first bracket 310 through the second guide rail assembly 330 so as to be able to drive the forming table 350 to move along the vertical direction. The first guide rail assembly 110 can drive the cantilever mechanism 300 to move above the loading platform 210 along the X-axis direction, so that the second plane 351 on the forming platform 350 is opposite to the first plane 2141 on the loading platform 210. After that, the second guide rail assembly 330 drives the cantilever 320 and the forming platform 350 to descend along the Z-axis direction (i.e., vertically) until the second plane 351 and the first plane 2141 have a specific spacing, and the second plane 351 is in contact with the material layer, and the exposure mechanism 400 irradiates the material layer to solidify the material layer on the second plane 351. The thickness of the solidified material layer is the same as the size of the specific spacing. It should be noted that the specific structure of the second guide rail assembly 330 can be the same or similar to the first guide rail assembly 110, and guide rail assemblies of other structures can also be used, as long as it can drive the cantilever 320 to move in the vertical direction.

[0097] Cooperate Figure 4 and Figure 5As shown, in some embodiments, the cantilever 320 can be connected to the forming table 350 through the adjustment plate 340, and the cantilever 320 is connected to the adjustment plate 340 through a plurality of first bolt groups 360, and the plurality of first bolt groups 360 are respectively connected to different positions on the adjustment plate 340, and the first bolt groups 360 are used to adjust the distance between the cantilever 320 and the corresponding positions on the adjustment plate 340, so as to adjust the angle of the adjustment plate 340 relative to the first plane 2141, and then the horizontality of the second plane 351 on the forming table 350 can be adjusted, so that the second plane 351 can be parallel or approximately parallel to the first plane 2141. In this way, when the forming table 350 approaches the loading platform 210, the distances between each point on the second plane 351 and the first plane 2141 are the same, and the thickness of the material layer solidified on the second plane 351 is consistent.

[0098] In a specific implementation, the adjustment plate 340 may be a rectangular plate, the top surface of the adjustment plate 340 may be opposite to the cantilever 320, and the forming table 350 may be connected to the bottom surface of the adjustment plate 340. A first bolt group 360 is provided at each of the four vertices near the adjustment plate 340. By adjusting the four first bolt groups 360, the distance between the four vertices of the adjustment plate 340 and the cantilever 320 can be adjusted, and then the horizontality of the adjustment plate 340 can be adjusted to achieve the purpose of adjusting the horizontality of the second plane 351 of the forming table 350. Specifically, a clamping groove with a T-shaped cross section may be provided on the bottom surface of the adjustment plate 340, and a clamping portion with a T-shaped cross section may be provided on the top of the forming table 350, and the forming table 350 can be clamped in the clamping groove through the clamping portion. To fix the forming table 350, a tightening bolt can be threadedly connected to the cantilever 320. The tightening bolt passes through the cantilever 320 and the adjustment plate 340 and abuts against the clamping portion, so that the forming table 350 can be firmly connected to the adjustment plate 340 to avoid falling off during movement.

[0099] Cooperate Figure 6As shown, in some embodiments, the cantilever 320 is provided with a plurality of hole groups corresponding one-to-one to the first bolt group 360, the hole group includes a first optical hole 321 and a first screw hole 322, and the adjustment plate 340 is provided with a plurality of second screw holes 341 corresponding one-to-one to the first optical hole 321; the first bolt group 360 includes a tightening bolt 361 and a pushing bolt 362, the tightening bolt 361 passes through the first optical hole 321 and is threadedly connected to the second screw hole 341; the pushing bolt 362 is threadedly connected to the first screw hole 322, and passes through the first screw hole 322 to abut against the adjustment plate 340. The push bolt 362 is threadedly connected to the cantilever 320 and abuts against the adjustment plate 340. The distance between the cantilever 320 and the adjustment plate 340 is the same as the length of the push bolt 362 protruding from the cantilever 320. Therefore, the distance between the cantilever 320 and the adjustment plate 340 can be adjusted by screwing in and out the push bolt 362. The tightening bolt 361 is screwed into the adjustment plate 340 to pull the adjustment plate 340, so as to achieve the purpose of fixing the cantilever 320 and the adjustment plate 340.

[0100] The specific structure of the feeding mechanism 200 is introduced in detail below. In a specific implementation, the feeding mechanism 200 may include a loading platform 210, a feeding head 220 and a scraper assembly 230. The loading platform 210 has a first plane 2141. The feeding head 220 is used to spray or extrude the corresponding material onto the first plane 2141 to form a material layer with a desired shape. After the material layer is solidified on the second plane 351 of the forming table 350 and is taken away by the forming table 350, the scraper assembly 230 can scrape and sweep the first plane 2141 to scrape off the residual material on the first plane 2141 to keep the first plane 2141 clean.

[0101] Cooperate Figure 7 and Figure 8As shown, in some embodiments, the loading platform includes a first annular frame 212, a second annular frame 213, a release film assembly 211 and a light-transmitting plate 214, the second annular frame 213 is arranged on the machine body, the release film assembly 211 includes an annular frame assembly 2111 and a release film 2112, the peripheral portion of the release film 2112 is connected to the annular frame assembly 2111 and is tensioned in the annular frame assembly 2111, the annular frame assembly 2111 is placed on the second annular frame 213, the first annular frame 212 is arranged on the top of the annular frame assembly 2111 and cooperates with the second annular frame 213 to clamp the annular frame assembly 2111; the light-transmitting plate 214 is placed at the bottom of the release film 2112 and is in contact with the release film 2112 to form a first plane 2141. The release film 2112 on the release film assembly 211 is pre-tensioned and fixed on the annular frame assembly 2111, which is beneficial to ensure the flatness of the release film 2112. During the production process, the first annular frame 212 and the second annular frame 213 are disassembled, and the release film assembly 211 is replaced as a whole to achieve the purpose of replacing the release film 2112. There is no need to cut the film and tension it on site. The operation is simple and beneficial to improving production efficiency.

[0102] In a specific implementation, the first annular frame 212 and the second annular frame 213 can be fixedly connected by a plurality of screws sequentially arranged at intervals along the first annular frame 212. For example, when the first annular frame 212 and the second annular frame 213 are both rectangular frames, a screw can be provided at each of the four vertices of the rectangular frame.

[0103] Cooperate Fig. 9 As shown, in some embodiments, the annular frame assembly 2111 may include a third annular frame 2113 and a fourth annular frame 2114 that are arranged opposite to each other, and the third annular frame 2113 and the fourth annular frame 2114 cooperate to clamp the peripheral portion of the release film 2112 and tighten the release film 2112. That is, the third annular frame 2113 and the fourth annular frame 2114 are respectively located above and below the release film 2112, and the release film 2112 is placed therebetween, and the third annular frame 2113 and the fourth annular frame 2114 are fixedly connected to clamp the peripheral edge of the release film 2112. The annular frame assembly 2111 has a simple structure and is easy to assemble.

[0104] Cooperate Figures 10 to 12As shown, in some embodiments, the loading platform may also include a material box 215 with an open top, the top of the material box 215 forms a second annular frame 213, the bottom surface of the material box 215 has a first through hole 2151, and a cylindrical first protrusion 2152 is extended upward from the edge of the first through hole 2151, and the light-transmitting plate 214 is covered on the top of the first protrusion 2152. The first protrusion 2152 protrudes from the open top of the material box 215 to lift the release film 2112, so that the release film 2112 and the first annular frame 212 jointly form a material receiving groove 2116 surrounding the light-transmitting plate 214, and the release film 2112 is provided with a leakage hole 2115 connecting the material receiving groove 2116 and the material box 215. After the scraper 233 sweeps the first plane 2141, the residual material on the first plane 2141 can be scraped into the material receiving trough 2116. A small amount of material will be temporarily stored in the material receiving trough 2116. When there is a lot of material in the material receiving trough 2116, it can fall into the material box 215 through the leakage hole 2115 for collection, so the material can be effectively recycled. Moreover, since the first plane 2141 protrudes from the material receiving trough 2116, the material in the material receiving trough 2116 is not easily brought back to the first plane 2141, which is beneficial to keeping the first plane 2141 clean.

[0105] In some embodiments, the feed head 220 is connected to the machine body 100 through a first three-circle moving mechanism 221, and the first three-circle moving mechanism 221 can drive the feed head 220 to move along the X-axis, Y-axis and Z-axis directions, and the feed head 220 can spray or extrude the material on the first plane 2141, and form a material layer with a desired shape. Among them, the first three-circle moving mechanism may include an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, the Y-axis moving mechanism may be arranged on the machine body 100, the X-axis moving mechanism may be connected to the Y-axis moving mechanism, and the Z-axis moving mechanism may be connected to the X-axis moving mechanism. Specifically, the X-axis moving mechanism, the Y-axis moving mechanism and the Z-axis moving mechanism may all include guide rails, sliders, drive devices and transmission mechanisms, and the guide rails of each moving mechanism are arranged along the X-axis direction, the Y-axis direction and the Z-axis direction respectively, the sliders are connected to the corresponding guide rails, and the drive device is connected to the sliders through the transmission mechanism to drive the sliders to slide along the guide rails. The transmission mechanism may have various forms, such as a belt transmission mechanism, a gear rack transmission mechanism, a screw transmission mechanism, etc.

[0106] In some embodiments, the scraper assembly 230 includes two tool holder assemblies 231, a scraper 233 and a first drive device 234. The two tool holder assemblies 231 are respectively arranged on opposite sides of the loading platform 210; the scraper 233 is located above the loading platform 210, and both ends of the scraper 233 are respectively connected to the tool holder assemblies 231; the first drive device 234 is connected to the two tool holder assemblies 231 in a transmission connection, and is used to drive the two tool holder assemblies 231 to move synchronously, and drive the scraper 233 to sweep across the first plane 2141 to scrape off the residual material. In a specific implementation, a guide rail arranged along the Y-axis direction can be set below the first table, and the tool holder assembly 231 can be connected to the machine body 100 through the guide rail, and the tool holder assembly 231 extends through the first table to the top of the first table, and the first drive device 234 can be a driving motor, and the first drive device 234 can be connected to the tool holder assembly 231 in a transmission connection through, for example, a belt transmission mechanism to drive the tool holder assembly 231 to move. In a preferred embodiment, the two tool holder assemblies 231 can be connected as one through a connecting beam to ensure that the two can move synchronously.

[0107] Cooperate Fig.13 and Fig.14 As shown, in some embodiments, the tool holder assembly 231 may include a tool holder seat 2311 and a tool holder slider 2312. The tool holder seat 2311 is arranged on the machine body 100 and is in driving connection with the first driving device 234 so as to be able to move along, for example, the Y-axis direction under the drive of the first driving device 234. The tool holder slider 2312 is slidably connected to the tool holder seat 2311, and the end of the scraper 233 is connected to the tool holder slider 2312. The first adjusting component is used to drive the tool holder slider 2312 to move along the vertical direction to adjust the height of the end of the scraper 233, so that the height and angle of the scraper 233 can be adjusted. For example, when the overall height of the scraper 233 is too high to scrape the scraper 233 to the first plane 2141, the heights of the two ends of the scraper 233 can be simultaneously lowered. When the height of one end of the scraper 233 is high and the scraper 233 is in an inclined state, the height of one end of the scraper 233 can be adjusted to adjust the angle of the scraper 233.

[0108] In some embodiments, the first adjustment component may include a first bolt 2313 and a first reset member (not shown in the figure), the first bolt 2313 is arranged in the vertical direction and is threadedly connected to the tool holder seat 2311, the first bolt 2313 passes through the tool holder seat 2311 and abuts against the top of the tool holder slide 2312, and is used to push the tool holder slide 2312 when screwed in, so that the tool holder slide 2312 moves downward; the first reset member is respectively connected to the tool holder seat 2311 and the tool holder slide 2312, and is used to apply a reset elastic force to the tool holder slide 2312, so that the tool holder slide 2312 moves upward when the first bolt 2313 is screwed out. Specifically, the first reset member may be a spring, and the first reset member may be connected between the tool holder seat 2311 and the bottom end of the tool holder slide 2312. The first bolt 2313 and the first reset member cooperate to precisely adjust the vertical position of the tool holder slider 2312, that is, the position of the tool holder slider 2312 in the Z-axis direction, so that the scraper 233 can sweep across the first plane 2141 at an appropriate height to remove residual material while preventing the scraper 233 from damaging the release film 2112 and the light-transmitting plate 214.

[0109] In some embodiments, the tool holder assembly 231 further includes a locking component, which is connected to the tool holder seat 2311 and the tool holder slider 2312 respectively, and is used to lock the tool holder slider 2312 and the tool holder seat 2311 after the first adjustment component adjusts the height of the tool holder slider 2312, so as to limit the movement of the tool holder slider 2312 and avoid affecting the scraping effect due to the up and down movement of the scraper 233. In a specific implementation, the locking component can have a variety of structures, as long as it can lock the tool holder slider 2312 and the tool holder seat 2311. In a specific embodiment, a first slot 2315 is opened on the tool holder slider 2312 near its side edge, and the first slot 2315 is strip-shaped and extends along the Z-axis direction. The first slot 2315 passes through the tool holder slider 2312 in the X-axis direction. The tool holder seat 2311 is provided with a first convex rib 2316, which extends into the first slot 2315 and can move along the first slot 2315. The first convex rib 2316 is provided with a second slot 2317, which is in a strip shape and extends along the Z-axis direction. The second slot 2317 penetrates the first convex rib 2316 in the Y-axis direction. The locking component includes a second bolt 2314, which is connected from the side edge along the The tool holder slider 2312 is screwed in the Y-axis direction, extends into the first slot hole 2315 from one side slot wall of the first slot hole 2315, passes through the second slot hole 2317, and is screwed into the tool holder slider 2312 again from the other side slot wall opposite to the first slot hole 2315. When the second bolt 2314 is screwed in, it can squeeze the side edge of the tool holder slider 2312, causing the first slide groove to deform and clamp the first rib 2316, thereby locking the tool holder slider 2312 and the tool holder seat 2311.

[0110] In some embodiments, the tool holder assembly 231 may also include a rotating block 2318 and a second adjusting component. The rotating block 2318 is rotatably connected to the tool holder slider 2312, and the end of the scraper 233 is connected to the rotating block 2318; the second adjusting component is used to drive the rotating block 2318 to rotate to adjust the inclination angle of the scraper 233 relative to the first plane 2141, so that the scraper 233 scrapes the first plane 2141 at an appropriate inclination angle to ensure the scraping effect.

[0111] Cooperate Fig.14 and Fig.15 As shown, in some embodiments, a pivot hole 2320 may be provided on the tool holder slider 2312, and the rotating block 2318 may have a cylindrical pivot portion 2319, which is rotatably connected to the pivot hole 2320. The second adjustment component may include a third bolt 2321 and a fourth bolt 2322, which are both threadedly connected to the tool holder slider 2312 and extend into the pivot hole 2320. The third bolt 2321 can push the periphery of the pivot portion 2319 from a first position to rotate the rotating block 2318 in a first direction, and the fourth bolt 2322 can push the periphery of the pivot portion 2319 from a second position to rotate the rotating block 2318 in a second direction opposite to the first direction. The first direction may be a clockwise direction or a counterclockwise direction, and the second direction is opposite to the first direction. The second adjustment component has a simple structure and can accurately adjust the inclination angle of the scraper 233 relative to the first plane 2141. In a preferred embodiment, the first notch groove and the second notch groove are respectively opened at the first position and the second position on the periphery of the pivotal portion 2319, and the third bolt 2321 and the fourth bolt 2322 are respectively inserted into the first notch groove and the second notch groove, and respectively abut against the side groove wall of the first notch groove and the side groove wall of the second notch groove, ensuring that the third bolt 2321 and the fourth bolt 2322 can stably push the pivotal portion 2319 to rotate, and prevent the third bolt 2321 and the fourth bolt 2322 from slipping off the periphery of the pivotal portion 2319. Further, the first notch groove and the second notch groove can be symmetrically arranged.

[0112] Cooperate Fig.13 , Fig.14 and Fig.16As shown, in some embodiments, a third slot 2333 is provided at the end of the scraper 233 along its length direction, and the third slot 2333 extends to the end surface of the scraper 233; a fixed block 2323 is pivotally connected to the rotating block 2318, and the end of the scraper 233 is overlapped on the fixed block 2323 and is fastened to the fixed block 2323 by a fifth bolt 2324 passing through the third slot 2333; a third reset member is connected between the rotating block 2318 and the fixed block 2323, and the third reset member is used to apply a reset elastic force to the fixed block 2323, so that when the fifth bolt 2324 is loosened, the fixed block 2323 is driven to move in a direction away from the scraper 233, so that the fifth bolt 2324 is disengaged from the third slot 2333, and the scraper 233 can be conveniently removed from the tool holder assembly 231. In a preferred embodiment, a second rib 2325 capable of extending into the third slot 2333 is convexly provided on the top of the fixing block 2323 . The second rib 2325 can limit the twisting of the scraper 233 , thereby further improving the stability of the scraper 233 .

[0113] Cooperate Fig.16 As shown, in some embodiments, the scraper 233 may include a blade body 2331 and a flexible scraping component 2332, the blade body 2331 is in a strip shape, and the two ends of the blade body 2331 extend outward to form a connecting portion 2334 for connecting to the blade holder assembly 231, and a third slot 2333 is provided on the connecting portion 2334, and the flexible scraping component 2332 is arranged at the bottom of the blade body 2331 and extends along the length direction of the blade body 2331, and the flexible scraping component 2332 at least partially protrudes from the bottom surface of the blade body 2331. Specifically, the flexible scraping component 2332 can be made of a flexible material such as silicone or rubber. The first plane 2141 is scraped by the flexible scraping component 2332, which has a good scraping effect, is not easy to cause damage to the release film 2112, and has a simple structure.

[0114] In a specific implementation, the bottom of the blade body 2331 is provided with a snap-in groove that runs through both ends thereof; the flexible scraping component 2332 includes a scraping portion and a snap-in portion connected to the top of the scraping portion, the snap-in portion is snap-into the snap-in groove, and the scraping portion protrudes from the snap-in groove. The flexible scraping component 2332 will wear out during use and needs to be replaced regularly. When removing the flexible scraping component 2332, the old flexible scraping component 2332 can be pushed out from one end of the snap-in groove by pushing the old flexible scraping component 2332 toward one end of the snap-in groove, and one end of the new flexible scraping component 2332 can be inserted into the snap-in groove from one end of the snap-in groove, and the new flexible scraping component 2332 can be loaded into the snap-in groove by pushing the new flexible scraping component 2332. The flexible scraping component 2332 is easy to disassemble and assemble and is easy to replace. Specifically, the cross-section of the snap-in groove and the snap-in portion can be T-shaped, and of course, can also be other shapes, as long as the flexible scraping component 2332 can be firmly snap-into the blade body 2331.

[0115] Cooperate Fig.17 As shown, in some embodiments, the exposure mechanism 400 may include a third rail assembly 410, a first connecting plate 420 and a plurality of light generators 430, the third rail assembly 410 is arranged below the loading platform 210, the first connecting plate 420 is movably connected to the third rail assembly 410; the plurality of light generators 430 are all connected to the first connecting plate 420, the plurality of light generators 430 are respectively used to project different types of light beams to the loading platform 210, and the plurality of light generators 430 have the same light beam projection position and projection angle when they are respectively moved to the same loading platform 210. Specifically, the third rail assembly 410 may be arranged on the second table of the machine body 100 along the X-axis direction, and the structure of the third rail assembly 410 may be similar to the first rail assembly 110 and the second rail assembly 330, and rail assemblies of other structures may also be used, as long as the first connecting plate 420 can be driven to move along the X-axis direction. A plurality of light generators 430 capable of projecting different types of light beams are arranged, so that the exposure mechanism 400 has the function of curing a variety of materials. Specifically, these different types of light beams may have different optical frequencies, wavelengths or light intensities, etc., and these light generators 430 may adopt LCD light sources, LED light sources or laser light sources, etc.

[0116] Cooperate Fig.18 and Fig.19As shown, in some embodiments, a first groove 421 is provided on the top surface of the first connecting plate 420, a second connecting plate 440 is provided in the first groove 421, the light generator 430 is connected to the second connecting plate 440, the first connecting plate 420 and the second connecting plate 440 are connected by a plurality of second bolt groups 450, the second bolt groups 450 penetrate the groove wall of the first groove 421 from the side edge of the first connecting plate 420 and are connected to the side edge of the second connecting plate 440, the plurality of second bolt groups 450 are respectively connected to different positions of the side edge of the second connecting plate 440, and are used to adjust the distance between the groove wall of the first groove 421 and the side edge of the first connecting plate 420 at the corresponding position, so as to adjust the position of the second connecting plate 440 on the first connecting plate 420. Specifically, the first connecting plate 420 and the second connecting plate 440 may have a through-going mounting hole, the light generator 430 passes through the mounting holes on the first connecting plate 420 and the second connecting plate 440, and partially extends above the second connecting plate 440, the first groove 421 may be a rectangular groove, the second connecting plate 440 may be a rectangular plate, and a second bolt group 450 may be connected to each of the four vertices close to the second connecting plate 440, and the position of the second connecting plate 440 on the first connecting plate 420 may be adjusted by adjusting the distance between the four vertices of the second connecting plate 440 and the groove wall of the first groove 421, so as to achieve the purpose of translating the light generator 430. The structure of the second bolt group 450 may be similar to the structure of the first bolt group 360 applied to the exposure mechanism 400, that is, it may also include a tension bolt 361 and a push bolt 362, and the distance between the groove wall of the first groove 421 and the side edge of the first connecting plate 420 at the corresponding position may be adjusted by pushing and pulling.

[0117] In some embodiments, the exposure mechanism 400 also includes a third connecting plate 460 arranged opposite to the second connecting plate 440, and the third connecting plate 460 can be arranged above the second connecting plate 440. The light generator 430 is fixedly connected to the third connecting plate 460 after passing through the first connecting plate 420 and the second connecting plate 440. The third connecting plate 460 and the second connecting plate 440 are connected by a plurality of third bolt groups 470. The plurality of third bolt groups 470 are respectively connected to different positions of the third connecting plate 460, and are used to adjust the distance between the third connecting plate 460 and the second connecting plate 440 at the corresponding positions, so as to adjust the angle of the third connecting plate 460 relative to the second connecting plate 440, and thus the projection angle of the light generator 430 can be adjusted. For example, the third connecting plate 460 may also be a rectangular plate, and a third bolt group 470 may be respectively set at the four vertices close to the third connecting plate 460. By adjusting the distance between the four vertices of the third connecting plate 460 and the second connecting plate 440, the angle of the third connecting plate 460 relative to the second connecting plate 440 can be adjusted, thereby adjusting the projection angle of the light generator 430.

[0118] Cooperate Figure 1 As shown, in some embodiments, the additive manufacturing device further includes a cleaning mechanism 500 and a drying device 600 disposed on the machine body 100. The cleaning mechanism 500 is used to clean the material layer solidified on the forming table 350; the drying device 600 is used to dry the cleaned material layer. During the curing process of the material layer, it is easy for some materials to be uncured. In the manufacturing process of multi-layered complex structure products, if uncured materials are mixed between the material layers, it will not only affect the structural strength and yield rate of the product, but also be difficult to clean after the manufacturing is completed. Therefore, after the material layer formed by one material is solidified, the molding table 350 can be moved to the cleaning mechanism 500 through the cantilever mechanism 300, and the material layer on the solidified molding table 350 can be cleaned by the cleaning mechanism 500 to clean the uncured material on the material layer, and then the molding table 350 can be moved to the drying device 600 through the cantilever mechanism 300, and the cleaned material layer can be dried by the drying device 600 to dry the residual cleaning agent on the surface of the material layer, and then another material can be molded to achieve multi-level complex structure printing, avoid affecting the structural strength of the product due to the inclusion of uncured materials between the material layers, and improve the yield rate of the product. In a preferred embodiment, the cleaning mechanism 500 and the drying device 600 can also be arranged in sequence along the moving direction of the cantilever mechanism 300 in the first guide rail assembly 110, and the distance between the cleaning mechanism 500 and the drying device 600 and the first guide rail assembly 110 can be equal to the distance between the feeding mechanism 200 and the first guide rail assembly 110.

[0119] Cooperate Fig. 20 and Fig.21As shown, in some embodiments, the cleaning mechanism 500 may include a first protective cover 510 and a nozzle assembly 520, wherein the first protective cover 510 is disposed on the machine body 100, specifically, the first protective cover 510 may be disposed on the first table of the machine body 100, the machine body 100 may also have a third table, and the first protective cover 510 may also be disposed on the third table. The top of the first protective cover 510 has a first opening 511, the side of the first protective cover 510 may be an open structure, the side of the first protective cover 510 may also have a third opening, and the bottom of the first protective cover 510 may also have a drain. The nozzle assembly 520 is connected to the machine body 100 through a second three-axis moving mechanism 530, and the nozzle assembly 520 extends from the side into the first protective cover 510. The nozzle assembly 520 can move along the X-axis, Y-axis and Z-axis driven by the second three-axis moving mechanism 530 to adjust the distance and relative position between the nozzle assembly 520 and the material layer. The cantilever mechanism 300 can drive the forming table 350 to move, and at least partially extend the material layer solidified on the forming table 350 from the first opening 511 into the first protective cover 510, and the nozzle assembly 520 can clean the material layer extending into the first protective cover 510 through the first opening 511 from bottom to top. The cleaning agent can be discharged through the drain port. In a specific implementation, a container 550 can be set below the drain port to collect the discharged cleaning agent. Among them, the second three-axis moving structure can also include an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, so as to be able to adjust the position of the nozzle assembly 520 in three dimensions: the X-axis direction, the Y-axis direction and the Z-axis direction.

[0120] Cooperate Fig. 22As shown, in some embodiments, the nozzle assembly 520 may include a nozzle body 521 and a plurality of nozzles, the nozzle body 521 is connected to the second three-axis moving mechanism 530, the top surface of the nozzle body 521 has a second groove 5111, the bottom of the second groove 5111 has a second through hole 5212 that penetrates the nozzle body 521; the plurality of nozzles include a first nozzle 522 arranged at the bottom of the groove, and a plurality of second nozzles 523 arranged around the first nozzle 522, the spraying direction of the first nozzle 522 is directly opposite to the first opening 511, and the spraying directions of the plurality of second nozzles 523 are gathered toward the middle. For example, in a specific embodiment, the second groove 5111 may be in the shape of an inverted octagonal pyramid, that is, the second groove 5111 has a bottom surface and eight side edges surrounding the bottom surface, the bottom surface may be provided with, for example, four second through holes 5212, the first nozzle 522 may be arranged in the middle of the bottom surface, and a second nozzle 523 may be arranged on each side edge surface, the spray direction of the first nozzle 522 is configured to be perpendicular to the bottom surface, and the spray direction of the second nozzle 523 is configured to be perpendicular to the side edge surface. The gathered water column has a better cleaning effect, and by adjusting the position of the nozzle body 521, the side edge of the material layer can also be cleaned through the second nozzle 523.

[0121] In a preferred embodiment, the cleaning mechanism 500 may further include a water baffle 540, which is disposed on a side of the nozzle assembly 520 close to the second three-axis moving mechanism 530, and the water baffle 540 also extends into the first protective cover 510. By providing the water baffle 540, it is possible to prevent the cleaning agent from splashing out of the first protective cover 510 from the third opening or the side opening of the first protective cover 510.

[0122] Cooperate Fig.23 As shown, in some embodiments, the drying device 600 includes a second protective cover 610 and a hot air assembly 620, the top of the second protective cover 610 has a second opening 611; the hot air assembly 620 is disposed in the second protective cover 610, and is used to guide the flow of air and heat the air, so as to dry the material layer extending into the second protective cover 610 through the second opening 611. Specifically, the hot air assembly 620 may include a fan and a heating device, the fan is used to guide the flow of air, and the heating device is used to heat the air.

[0123] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An additive manufacturing device, characterized in that: include: Body; A plurality of feeding mechanisms, each of which is used to feed different materials, wherein the feeding mechanism comprises a loading platform provided on the machine body and having a first plane on the top, and a feeding head suspended above the loading platform, wherein the feeding head is used to form a material layer having a desired shape on the first plane; a cantilever mechanism, which is movably arranged on the machine body, the cantilever mechanism is connected to a forming table, and is capable of moving the forming table above the loading table so that a second plane on the forming table is opposite to the first plane and in contact with the material layer; The exposure mechanism is arranged below the material loading platform and is used for irradiating the material layer through the material loading platform so that the irradiated material layer is cured on the second plane.

2. The additive manufacturing device according to claim 1, characterized in that: The machine body is provided with a first guide rail assembly, the cantilever mechanism is connected to the machine body via the first guide rail assembly, a plurality of the feeding mechanisms are located on the same side of the first guide rail assembly, and the plurality of the feeding mechanisms are arranged in sequence along the moving direction of the cantilever mechanism on the first guide rail assembly and are at equal distances from the first guide rail assembly.

3. The additive manufacturing device according to claim 1, characterized in that: The loading platform includes a first annular frame, a second annular frame, a release film assembly and a light-transmitting plate, the second annular frame is arranged on the machine body, the release film assembly includes an annular frame assembly and a release film, the peripheral portion of the release film is connected to the annular frame assembly and is tensioned inside the annular frame assembly, the annular frame assembly is placed on the second annular frame, the first annular frame is arranged on the top of the annular frame assembly and cooperates with the second annular frame to clamp the annular frame assembly; the light-transmitting plate is placed on the bottom of the release film and fits with the release film to form the first plane.

4. The additive manufacturing device according to claim 3, characterized in that: The loading platform also includes a material box with an open top, the top of the material box forms the second annular frame, the bottom surface of the material box has a first through hole, and a cylindrical first protrusion extends upward from the edge of the first through hole, the light-transmitting plate cover is arranged on the top of the first protrusion, the first protrusion protrudes out of the open top of the material box to lift the release film, so that the release film and the first annular frame together form a material receiving groove surrounding the light-transmitting plate, and the release film is provided with a leakage hole connecting the material receiving groove and the material box.

5. The additive manufacturing device according to claim 1, characterized in that: The feed head is connected to the machine body through a first three-axis moving mechanism, so that the feed head is driven to move through the first three-axis moving mechanism and form the material layer with a desired shape on the first plane.

6. The additive manufacturing device according to claim 1, characterized in that: The feeding mechanism also includes: The scraper assembly is used to scrape away the residual material on the first plane.

7. The additive manufacturing device according to claim 6, characterized in that: The scraper assembly comprises: Two tool holder assemblies, which are respectively arranged on opposite sides of the loading platform; A scraper, which is located above the material loading platform, and two ends of the scraper are respectively connected to the two tool holder assemblies; The first driving device is drivingly connected to the two tool holder assemblies, and is used for driving the two tool holder assemblies to move synchronously, and driving the scraper to sweep across the first plane to scrape off residual materials.

8. The additive manufacturing device according to claim 7, characterized in that: The tool holder assembly comprises: A tool holder seat, which is arranged on the machine body and is drivingly connected to the first driving device; A tool holder slider is slidably connected to the tool holder seat, and the end of the scraper is connected to the tool holder slider; The first adjusting component is used to drive the tool holder slider to move in a vertical direction to adjust the height of the end of the scraper.

9. The additive manufacturing device according to claim 8, characterized in that: The tool holder assembly also includes: A rotating block rotatably connected to the tool holder slider, and an end of the scraper is connected to the rotating block; The second adjusting component is used to drive the rotating block to rotate so as to adjust the inclination angle of the scraper relative to the first plane.

10. The additive manufacturing device according to claim 7, characterized in that: The scraper comprises: A blade body, which is in a strip shape, with connecting parts for connecting to the blade holder assembly at both ends of the blade body; A flexible scraping and sweeping component is arranged at the bottom of the blade body and extends along the length direction of the blade body. The flexible scraping and sweeping component at least partially protrudes from the bottom surface of the blade body.

11. The additive manufacturing device according to claim 1, characterized in that: The cantilever mechanism comprises: A first bracket, which is movably arranged on the machine body, and a second guide rail assembly arranged in a vertical direction is provided on the first bracket; The cantilever is connected to the first bracket through the second guide rail assembly so as to drive the forming table to move in a vertical direction.

12. The additive manufacturing device according to claim 11, characterized in that: The cantilever is connected to the forming table through an adjustment plate, and the cantilever is connected to the adjustment plate through multiple first bolt groups, and the multiple first bolt groups are respectively connected to different positions on the adjustment plate. The first bolt groups are used to adjust the distance between the cantilever and the corresponding positions on the adjustment plate to adjust the angle of the adjustment plate relative to the first plane.

13. The additive manufacturing device according to claim 12, characterized in that: The cantilever is provided with a plurality of hole groups corresponding to the first bolt group one by one, the hole group includes a first optical hole and a first screw hole, and the adjustment plate is provided with a plurality of second screw holes corresponding to the first optical hole one by one; the first bolt group includes a tightening bolt and a pushing bolt, the tightening bolt passes through the first optical hole and is threadedly connected to the second screw hole; the pushing bolt is threadedly connected to the first screw hole, and passes through the first screw hole to abut against the adjustment plate.

14. The additive manufacturing device according to claim 1, characterized in that: The exposure mechanism comprises: A third guide rail assembly is arranged below the loading platform; A first connecting plate, which is movably connected to the third guide rail assembly; A plurality of light generators are connected to the first connecting plate, and the plurality of light generators are respectively used to project different types of light beams to the loading platform, and the plurality of light generators have the same light beam projection position and projection angle when they are respectively moved under the same loading platform.

15. The additive manufacturing device according to claim 14, characterized in that: A first groove is provided on the top surface of the first connecting plate, a second connecting plate is provided in the first groove, the light generator is connected to the second connecting plate, the first connecting plate and the second connecting plate are connected by a plurality of second bolt groups, the second bolt groups penetrate the groove wall of the first groove from the side edge of the first connecting plate and are connected to the side edge of the second connecting plate, the plurality of second bolt groups are respectively connected to different positions of the side edge of the second connecting plate, and are used to adjust the distance between the groove wall of the first groove and the side edge of the first connecting plate at the corresponding position, so as to adjust the position of the second connecting plate on the first connecting plate.

16. The additive manufacturing device according to claim 15, characterized in that: The exposure mechanism also includes a third connecting plate arranged opposite to the second connecting plate, the light generator is connected to the third connecting plate, the third connecting plate and the second connecting plate are connected by a plurality of third bolt groups, and the plurality of third bolt groups are respectively connected to different positions of the third connecting plate, and are used to adjust the distance between the third connecting plate and the second connecting plate at corresponding positions, so as to adjust the angle of the third connecting plate relative to the second connecting plate.

17. The additive manufacturing device according to claim 1, characterized in that: The additive manufacturing device also includes a cleaning mechanism and a drying device arranged on the machine body, wherein the cleaning mechanism is used to clean the material layer solidified on the forming table; and the drying device is used to dry the cleaned material layer.

18. The additive manufacturing device according to claim 17, characterized in that: The cleaning mechanism comprises: A first protective cover is arranged on the machine body, and a top of the first protective cover has a first opening; A nozzle assembly is connected to the machine body via a second three-axis moving mechanism. The nozzle assembly extends into the first protective cover from the side to clean the material layer extending into the first protective cover through the first opening from bottom to top.

19. The additive manufacturing device according to claim 18, characterized in that: The nozzle assembly comprises: A nozzle body connected to the second three-axis moving mechanism, wherein the top surface of the nozzle body is provided with a second groove, and the bottom of the second groove is provided with a second through hole penetrating the nozzle body; A plurality of nozzles include a first nozzle arranged at the bottom of the groove, and a plurality of second nozzles arranged around the first nozzle, the spraying direction of the first nozzle faces the first opening, and the spraying directions of the plurality of second nozzles converge toward the middle.

20. The additive manufacturing device according to claim 17, characterized in that: The drying device comprises: A second protective cover having a second opening at the top thereof; The hot air component is arranged in the second protective cover and is used for guiding the air flow and heating the air flow so as to dry the material layer extending into the second protective cover through the second opening.

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