Scraper knife assembly, module, automatic discharging device and 3D printing system

Abstract

The invention provides a scraper knife assembly, a module, an automatic discharging device and a 3D printing system, a scraper knife main body is assembled on an assembly seat body, the scraper knife main body comprises a knife body main area part and a knife body function part which are connected, and the scraper knife main body is configured to have a knife body transverse direction and a knife body longitudinal direction which are perpendicular to each other; the cutter body main area part and the cutter body function part are longitudinally arranged along the cutter body, the area of the cutter body main area part is larger than that of the cutter body function part, and the cutter body function part is provided with an upper function surface and a lower function surface which face opposite directions. The upper functional surface and the lower functional surface are provided with liquid drainage structures, and the liquid drainage structures are used for guiding liquid printing materials to flow out of the knife body main area part. Therefore, the liquid resin can be guided out of the knife body main area part when passing through the liquid drainage structure, so that the liquid resin is prevented from flowing to the knife body main area part, and the subsequent cleaning of the scraper knife main body becomes simpler.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a blade assembly, a module, an automatic unloading device and a 3D printing system. Background Art

[0002] Liquid resin printing, also known as liquid resin photocuring 3D printing, is an additive manufacturing technology that uses liquid photosensitive resin as material to construct three-dimensional objects layer by layer through the principle of photocuring.

[0003] The basic principle of liquid resin printing is photocuring reaction, that is, when light of a specific wavelength is irradiated to the liquid photosensitive resin, the photoinitiator in the resin absorbs light energy and produces active species such as free radicals or cations. These active species trigger the polymerization reaction of monomers and prepolymers in the resin, so that the liquid resin quickly changes from liquid to solid, and prints a solid model on the molding table. When the model is printed, it is in a suspended state upside down on the molding table. At this time, an automatic unloading device is required to separate the top of the model from the molding table so that the model falls freely.

[0004] However, the molding process of the model part is to rise and move out of the liquid resin, so the surface of the model part will be stained with liquid resin, including the part connecting the model part to the molding table. Therefore, when the scraper scrapes the model part off the molding table, it is easy for the scraper to be covered with liquid resin, making it more difficult to clean the scraper later. Summary of the invention

[0005] Based on this, it is necessary to provide a blade assembly, module, automatic unloading device and 3D printing system to address the above-mentioned technical problems.

[0006] The present application provides a blade assembly, the blade assembly comprising:

[0007] Component seat body;

[0008] A scraper blade body, the scraper blade body is assembled on the component base, the scraper blade body includes a connected main blade body portion and a blade body functional portion, wherein the scraper blade body is configured to have a mutually perpendicular blade body transverse direction and a blade body longitudinal direction, the main blade body portion and the blade body functional portion are configured to be arranged along the blade body longitudinal direction, and the area of ​​the main blade body portion is larger than the area of ​​the blade body functional portion; wherein the blade body functional portion has an upper functional surface and a lower functional surface facing opposite directions, at least one of the upper functional surface and the lower functional surface is provided with a liquid drainage structure, and the liquid drainage structure is configured to guide liquid printing material to flow outside the main blade body portion.

[0009] In one embodiment, the liquid drainage structure comprises:

[0010] At least one liquid receiving groove is provided on the upper functional surface of the blade functional portion, wherein the liquid receiving groove is configured as a linear groove, and each of the liquid receiving grooves is configured to be arranged transversely along the blade of the blade body on the upper functional surface of the blade functional portion; and / or,

[0011] At least one liquid blocking protrusion is arranged on the lower functional surface of the blade body functional part, and the liquid blocking protrusion is configured as a linear protrusion. Each of the liquid blocking protrusions is configured to be arranged on the lower functional surface of the blade body functional part transversely along the blade body of the scraper body.

[0012] In one of the embodiments, the liquid receiving groove is configured to define a virtual depth line, and the groove depth of the liquid receiving groove is configured to be opened along the virtual depth line, wherein the virtual depth line has an inclined angle relative to the upper functional surface of the blade functional part, and the virtual depth line is arranged along the longitudinal direction of the blade body of the scraper body.

[0013] In one embodiment, the lower functional surface of the blade functional part is divided into at least three lower unit surfaces, several of which are arranged longitudinally along the blade of the blade body, and at least one liquid blocking protrusion is provided between adjacent lower unit surfaces, wherein different lower unit surfaces have different surface inclinations.

[0014] In one of the embodiments, the lower functional surface of the functional part of the blade body is divided into three lower unit surfaces, one of the liquid blocking protrusions is arranged between adjacent lower unit surfaces, and adjacent lower unit surfaces are separated based on one of the liquid blocking protrusions therebetween, wherein the surface inclination of one of the lower unit surfaces located in the middle of the three lower unit surfaces is smaller than the surface inclinations of the other two lower unit surfaces.

[0015] In one embodiment, the blade body is elastically and movably assembled on the component base.

[0016] In one embodiment, the blade assembly comprises:

[0017] The blade transfer platform is elastically and movably mounted on the component base, and the blade body is mounted on the blade transfer platform, thereby being indirectly and elastically and movably mounted on the component base through the blade transfer platform.

[0018] The present application provides a scraper module, the scraper module comprising:

[0019] A module platform, wherein the module platform is provided with a blade movement track;

[0020] The blade assembly is movably mounted on the module platform along the blade motion track, the blade motion track is configured as a linear track, and the blade assembly is configured to reciprocate relative to the module platform along the blade motion track.

[0021] The present application provides an automatic unloading device, the automatic unloading device comprising:

[0022] A device base, wherein the device base is provided with a module motion track;

[0023] The scraper module is movably assembled on the device base along the module motion track, the module motion track is configured as a linear track, and the module motion track and the scraper motion track of the scraper module are parallel to each other.

[0024] The present application provides a 3D printing system, the 3D printing system comprising:

[0025] System base;

[0026] A 3D printer, the 3D printer is mounted on the system base, wherein the 3D printer comprises a machine body, a liquid material tray and a molding table mounted on the machine body, the molding table is movably mounted on the machine body, and the molding table is configured to move closer to or farther from the liquid material tray on the machine body;

[0027] The automatic unloading device is assembled on the system base.

[0028] In the above-mentioned scraper blade assembly, module, automatic unloading device and 3D printing system, when the scraper blade assembly reciprocates relative to the module platform along the X-axis direction, driving the scraper blade body to move along the scraper blade movement track in the X-axis direction, when the model part on the molding surface is scraped off, the blade body functional part will come into contact with the molding table, and the liquid resin on the surface of the model part will flow from the blade body functional part to the blade body main area along the X-axis direction. When the liquid resin passes through the liquid drainage structure, it will be guided to the outside of the blade body main area, thereby preventing the liquid resin from flowing to the blade body main area, so that only a small part of the blade body functional part on the scraper body can be adhered to the liquid resin, while the blade body main area occupying most of the area will not be stained with liquid resin, which makes the subsequent cleaning of the scraper blade body easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a 3D printing system provided in one embodiment of the present application.

[0030] Figure 2 For Figure 1 A first-person exploded view of the 3D printing system shown.

[0031] Figure 3 For Figure 1 A second perspective exploded view of the 3D printing system shown.

[0032] Figure 4 An internal structural diagram of an automatic unloading device provided for one embodiment of the present application.

[0033] Figure 5 A partial structural diagram of a blade module provided in accordance with an embodiment of the present application.

[0034] Figure 6 A plan view of the structure of a blade body provided in accordance with an embodiment of the present application.

[0035] Figure 7 For Figure 6 A first perspective stereoscopic view of a blade body is shown.

[0036] Figure 8 For Figure 6 A second perspective stereoscopic view of the blade body is shown.

[0037] Figure Number:

[0038] 1000, system base; 2000, 3D printer; 3000, automatic unloading device;

[0039] 2000, machine body; 2100, liquid material tray; 2200, forming table;

[0040] 3100, device base; 3200, scraper module; 3300, model central box;

[0041] 3101, module motion track;

[0042] 3210, module platform; 3220, scraper assembly; 3230, elastic assembly; 3240, support frame;

[0043] 3211, blade movement track;

[0044] 3221, component seat; 3222, blade body; 3223, blade transfer platform; 3223a, elastic connection area; 3223b, rotation connection area;

[0045] 32221, main area of ​​knife body; 32222, functional part of knife body;

[0046] 32222a, upper functional surface; 32222b, lower functional surface; 322221, liquid receiving groove; 322222, liquid blocking protrusion;

[0047] 322221a, virtual depth line; 32222b1, lower unit surface;

[0048] 3241. Frame main body; 3242. Frame support portion; 3243. Model receiving box. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0050] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0055] See also Figures 1 to 8 As shown, the present application provides a 3D printing system, the 3D printing system includes a system base 1000, a 3D printer 2000 and an automatic unloading device 3000, and the 3D printer 2000 is assembled on the system base 1000. Among them, the 3D printer 2000 is a 3D printer 2000 that implements liquid resin photocuring 3D printing, and the liquid photosensitive resin (referred to as liquid resin) is the printing material, and the three-dimensional object is constructed layer by layer through the principle of photocuring. The basic principle of liquid resin printing is photocuring reaction, that is, when light of a specific wavelength is irradiated to the liquid photosensitive resin, the photoinitiator in the resin absorbs light energy and produces active species such as free radicals or cations. These active species trigger the monomers and prepolymers in the resin to undergo polymerization reactions, so that the liquid resin quickly changes from liquid to solid.

[0056] like Figure 1 As shown, the 3D printer 2000 includes a machine body 2000 and a liquid material tray 2100 and a forming table 2200 mounted on the machine body 2000. The forming table 2200 is movably mounted on the machine body 2000, and the forming table 2200 is located above the liquid material tray 2100. The forming table 2200 is configured to move closer to or farther away from the liquid material tray 2100 on the machine body 2000. For example, the forming table 2200 can perform an ascending and descending action via a lifting track longitudinally arranged on the machine body 2000, thereby approaching or moving away from the liquid material tray 2100 by ascending and descending.

[0057] The automatic unloading device 3000 is mounted on the system base 1000. Regarding the automatic unloading device 3000 mentioned above, the automatic unloading device 3000 may include a device base 3100 and a blade module 3200. The device base 3100 is provided with a module motion track 3101. The blade module 3200 is movably mounted on the device base 3100 along the module motion track 3101, wherein the module motion track 3101 is configured as a linear track, and the module motion track 3101 is arranged along the X-axis direction. Therefore, the blade module 3200 in the automatic unloading device 3000 can reciprocate relative to the device base 3100 along the X-axis direction based on the module motion track 3101.

[0058] like Figure 1 As shown, the 3D printer 2000 and the automatic unloading device 3000 are also arranged along the X-axis direction. Therefore, the scraper module 3200 in the automatic unloading device 3000 reciprocates relative to the device base 3100 along the X-axis direction based on the module motion track 3101, that is, the scraper module 3200 can reciprocate relative to the 3D printer 2000 along the X-axis direction, so that the scraper module 3200 can approach the liquid material tray 2100 and the molding table 2200 of the 3D printer 2000 along the X-axis direction, or the scraper module 3200 moves away from the liquid material tray 2100 and the molding table 2200 of the 3D printer 2000 along the X-axis direction. As a result, when the scraper module 3200 approaches the liquid material tray 2100 and the molding table 2200 of the 3D printer 2000 along the X-axis direction, the printed model parts on the molding table 2200 are separated to realize the transfer of the model parts.

[0059] Regarding the blade module 3200 mentioned above, the blade module 3200 may include a module platform 3210 and a blade assembly 3220, the module platform 3210 is provided with a blade motion track 3211, the blade assembly 3220 includes an assembly base 3221 and a blade body 3222, the assembly base 3221 is movably mounted on the module platform 3210 along the blade motion track 3211, the blade motion track 3211 is configured as a linear track, the assembly base 3221 is configured to reciprocate along the blade motion track 3211 relative to the module platform 3210, wherein the blade body 3222 is elastically movably mounted on the assembly base 3221. The module motion track 3101 and the blade motion track 3211 of the blade module 3200 are parallel to each other, therefore, the blade motion track 3211 and the module motion track 3101 are both arranged along the X-axis direction.

[0060] At this time, the component base 3221 in the blade component 3220 can reciprocate along the X-axis direction relative to the module platform 3210 based on the blade motion track 3211, that is, the component base 3221 can drive the blade body 3222 to reciprocate along the X-axis direction relative to the 3D printer 2000, so that the blade body 3222 can approach the forming table 2200 of the 3D printer 2000 along the X-axis direction, or the blade body 3222 can move away from the forming table 2200 of the 3D printer 2000 along the X-axis direction. As a result, when the blade body 3222 approaches the forming table 2200 of the 3D printer 2000 along the X-axis direction, the printed model parts on the forming table 2200 are separated to realize the transfer of the model parts.

[0061] It should be noted that the above-mentioned module motion track 3101 and the scraper motion track 3211 are parallel and independent tracks. The module motion track 3101 can be used to make the scraper module 3200 reciprocate along the X-axis direction relative to the device base 3100. In the scraper module 3200, the scraper motion track 3211 can make the scraper assembly 3220 reciprocate along the X-axis direction relative to the module platform 3210 (that is, the assembly base 3221 drives the scraper body 3222 to reciprocate along the X-axis direction relative to the module platform 3210). Therefore, the blade body 3222 can move in the X-axis direction based on any one of the module motion track 3101 and the blade motion track 3211, wherein the blade module 3200 reciprocates along the X-axis direction relative to the device base 3100 to realize the movement of the blade body 3222 in the X-axis direction, and the blade assembly 3220 reciprocates along the X-axis direction relative to the module platform 3210 to also realize the movement of the blade body 3222 in the X-axis direction.

[0062] In order to solve the problem that the forming table 2200 of the 3D printer 2000 and the scraper body 3222 of the automatic unloading device 3000 are difficult to form an absolute level, and the model parts are easily damaged when separated relative to the forming table 2200, the present application stipulates that the scraper body 3222 is elastically and movably assembled on the component base 3221. Since the scraper body 3222 is elastically and movably assembled on the component base 3221, the scraper body 3222 can form elastic movement relative to the component base 3221 when subjected to force, thereby forming an elastic adjustment margin that can compensate for the installation error (the difficulty in absolute level mentioned above).

[0063] like Figure 5As shown, when the blade body 3222 moves in the X-axis direction in the above-mentioned manner, the blade body 3222 can overlap longitudinally with the forming table 2200 of the 3D printer 2000 in the Y-axis direction, and then the forming table 2200 moves along the Y-axis direction to elastically contact the blade body 3222. Specifically, the model is formed on the bottom surface of the forming table 2200, that is, the forming surface of the forming table 2200 is facing downward, not upward.

[0064] At this time, the scraper body 3222 can move to the bottom of the forming table 2200 along the X-axis direction, and the forming table 2200 descends longitudinally along the Y-axis direction, so that the scraper body 3222 contacts the forming surface of the forming table 2200. Based on the elastic assembly state of the scraper body 3222, the forming surface of the forming table 2200 can be closely fitted with the scraper body 3222. In this state, when the scraper body 3222 continues to move toward the forming table 2200 along the X-axis direction, the scraper body 3222 can shovel the model part from the forming surface of the forming table 2200 by closely adhering to the forming surface of the forming table 2200, so as to separate the model part. In this process, the scraper body 3222 will only shovel the model part from the forming surface by adhering to the top of the model part, so as not to damage the model part.

[0065] The blade body 3222 can be directly or indirectly elastically assembled on the component base 3221. For example, in one embodiment, the blade component 3220 may also include a blade adapter platform 3223, and the blade adapter platform 3223 is elastically assembled on the component base 3221, wherein a positioning connection groove is provided on the blade adapter platform 3223, and the tail end of the blade body 3222 is fixedly assembled on the blade adapter platform 3223 through the positioning connection groove, wherein the relative fixed connection between the blade body 3222 and the blade adapter platform 3223 can be achieved by a screw member or the like, thereby the blade body 3222 can be indirectly elastically assembled on the component base 3221 through the blade adapter platform 3223.

[0066] In one embodiment, the blade module 3200 may include an elastic component 3230, the elastic component 3230 includes a plurality of elastic elements, the blade adapter platform 3223 is provided with at least two elastic connection areas 3223a, and the plurality of elastic connection areas 3223a are arranged along a direction parallel to the blade movement track 3211, each of the elastic connection areas 3223a includes at least two elastic connection points, and the plurality of elastic connection points contained in each of the elastic connection areas 3223a are arranged along a direction perpendicular to the blade movement track 3211, wherein each of the elastic connection points is equipped with an elastic element, and the blade adapter platform 3223 is elastically assembled to the component base 3221 through the plurality of elastic elements in the plurality of elastic connection areas 3223a.

[0067] For example, in one embodiment, the elastic component 3230 may include four elastic elements, and the blade adapter platform 3223 is provided with two elastic connection areas 3223a, and the two elastic connection areas 3223a are arranged front and back along the X-axis direction, and each of the elastic connection areas 3223a includes two elastic connection points. Therefore, the two elastic connection areas 3223a may have a total of four elastic connection points. At this time, the four elastic connection points can be connected to form a square, such as a rectangle or a square.

[0068] The elastic connection points included in each elastic connection area 3223a are arranged left and right along the Y-axis direction, wherein each elastic connection point is equipped with an elastic element. At this time, the four elastic elements can also be connected to form a square, such as a rectangle or a square. Based on the arrangement of the four elastic elements, the blade adapter platform 3223 can be elastically assembled on the component base 3221 through the four elastic elements. At this time, Figure 5 As shown, the blade body 3222 can achieve a "nodding" motion based on the arrangement of the four elastic elements, that is, along Figure 5 The arrows shown indicate up and down movement.

[0069] In one embodiment, the blade adapter platform 3223 is provided with a rotating connection area 3223b, and the rotating connection area 3223b of the blade adapter platform 3223 is equipped with a rotating shaft, and the blade adapter platform 3223 is also configured to be assembled to the component base 3221 through fixed-axis rotation of the rotating shaft, wherein the blade motion track 3211 is configured as a linear track, the rotation axis of the rotating shaft is perpendicular to the blade motion track 3211, and the rotating connection area 3223b is located between any adjacent elastic connection areas 3223a.

[0070] Therefore, based on the synchronous cooperation of the above-mentioned rotating shaft and a plurality of elastic elements, the scraper body 3222 can realize "elastic nodding" movement along the fixed rotating axis. At this time, if the scraper body 3222 contacts the molding surface of the molding table 2200, the scraper body 3222 can be adapted to closely fit with the molding surface of the molding table 2200 when realizing "elastic nodding" movement along the fixed rotating axis, so as to ensure that when the scraper body 3222 moves toward the molding table 2200 along the X-axis direction, the scraper body 3222 can scrape off the model piece by sticking to the molding surface.

[0071] In one embodiment, the blade module 3200 may further include a support frame 3240, the support frame 3240 includes a connected frame body 3241 and a frame support portion 3242, the frame body 3241 of the support frame 3240 is mounted on the module platform 3210, the support frame 3240 is located below the blade assembly 3220, and the frame support portion 3242 is configured to support the forming table 2200 of the 3D printer 2000, wherein the frame support portion 3242 may include at least two support columns, and a plurality of the support columns are vertically mounted on the frame body 3241, and are used to support the forming table 2200 at the rear side of the forming table 2200. The rear side of the forming table 2200 is the side away from the blade body 3222 along the X-axis direction, and the front side of the forming table 2200 is the side facing the blade body 3222 along the X-axis direction.

[0072] The movement of the support frame 3240 mainly depends on the reciprocating movement of the scraper module 3200 relative to the device base 3100 along the X-axis direction. At this time, the support frame 3240 included in the scraper module 3200 can also be close to the forming table 2200 or away from the forming table 2200 along the X-axis direction. First, the forming table 2200 can be higher than the support frame 3240 in the Y-axis direction. At this time, the scraper module 3200 moves relative to the device base 3100 along the X-axis direction, so that the support frame 3240 is close to the forming table 2200 along the X-axis direction. When the frame support part 3242 of the support frame 3240 exceeds the forming table 2200 in the X-axis direction, the forming table 2200 can fall, so that the frame support part 3242 is located at the rear side of the forming table 2200, and the position of the support frame 3240 can be adjusted along the X-axis direction so that the frame support part 3242 can be supported at the rear side of the forming table 2200.

[0073] At this time, the blade assembly 3220 reciprocates along the X-axis direction relative to the module platform 3210 (that is, the assembly base 3221 drives the blade body 3222 to reciprocate along the X-axis direction relative to the module platform 3210). At this time, although the blade body 3222 can move in the X-axis direction based on the blade motion track 3211, the support frame 3240 remains stationary and always supports the rear side of the forming table 2200. In this supported state, the blade body 3222 moves in the X-axis direction, so that the blade body 3222 moves toward the forming table 2200, and then scrapes off the model relative to the forming surface of the forming table 2200. In this process, although the blade body 3222 can apply a force from the front side of the forming table 2200 to the rear side of the forming table 2200, since the support frame 3240 always supports the rear side of the forming table 2200, the stability of the forming table 2200 can be guaranteed.

[0074] The scraper assembly 3220 includes an assembly base 3221 and a scraper body 3222. The scraper body 3222 is assembled on the assembly base 3221. The scraper assembly 3220 reciprocates along the X-axis direction relative to the module platform 3210, driving the scraper body 3222 to move along the scraper motion track 3211 in the X-axis direction to scrape off the model on the molding surface. The molding process of the model is to rise and move out of the liquid resin, so the surface of the model will be stained with liquid resin, including the part between the model and the molding surface. Therefore, when the scraper body 3222 scrapes the model off the molding surface, it is easy for the scraper body 3222 to be stained with liquid resin, which increases the difficulty of cleaning the scraper body 3222 later.

[0075] In response to the problem of the blade body 3222 being stained with liquid resin, regarding the structural design of the above-mentioned blade body 3222, in one embodiment, the blade body 3222 may be defined as including a connected blade body main area 32221 and a blade body functional area 32222, wherein the blade body 3222 is configured to have mutually perpendicular blade body transverse and blade body longitudinal directions, the blade body main area 32221 and the blade body functional area 32222 are configured to be arranged along the blade body longitudinal direction, and the area of ​​the blade body main area 32221 is larger than the area of ​​the blade body functional area 32222. Among them, the blade function part 32222 of the blade main body 3222 is mainly used to implement the function of scraping off the model part, that is, the blade function part 32222 of the blade main body 3222 is closer to the forming table 2200 and the model part relative to the blade main area 32221. When the blade main body 3222 moves along the X-axis, the blade function part 32222 comes into contact with the forming table 2200 to scrape off the model part.

[0076] Therefore, if Figures 6 to 8As shown, the blade body functional portion 32222 can be defined as having an upper functional surface 32222a and a lower functional surface 32222b facing opposite directions, and at least one of the upper functional surface 32222a and the lower functional surface 32222b is provided with a liquid drainage structure, and the liquid drainage structure is configured to guide the liquid printing material to flow outside the blade body main area 32221.

[0077] When the scraper assembly 3220 reciprocates along the X-axis direction relative to the module platform 3210, the scraper body 3222 is driven to move along the scraper movement track 3211 in the X-axis direction. When the model part on the molding surface is scraped off, the blade function part 32222 will come into contact with the molding table 2200. When the liquid resin on the surface of the model part flows from the blade function part 32222 to the blade main area 32221 along the X-axis direction, the liquid resin will be guided to the outside of the blade main area 32221 when passing through the liquid drainage structure, thereby preventing the liquid resin from flowing to the blade main area 32221, so that only a small part of the blade function part 32222 on the scraper body 3222 can be adhered to the liquid resin, while the blade main area 32221 occupying most of the area will not be stained with liquid resin, which makes the subsequent cleaning of the scraper body 3222 easier.

[0078] The liquid drainage structure can be implemented by using a suitable structure such as a pipeline, a groove, a protrusion, etc. For example, the liquid drainage structure may include a liquid receiving groove 322221 on the upper functional surface 32222a and a liquid blocking protrusion 322222 on the lower functional surface 32222b, that is, it includes at least one liquid receiving groove 322221 opened on the upper functional surface 32222a of the blade functional part 32222, and the liquid receiving groove 322221 is configured as a linear groove, and each of the liquid receiving grooves 3222 21 are configured to be arranged along the blade body of the blade main body 3222 in a transverse direction on the upper functional surface 32222a of the blade body functional part 32222. At this time, the blade body of the blade main body 3222 is arranged in a transverse direction parallel to the Y-axis direction during assembly and operation. The linear grooves arranged along the Y-axis direction can form a container for the liquid resin, thereby realizing the drainage function of the liquid resin, so that the liquid resin can flow along the Y-axis direction in the liquid receiving groove 322221, rather than flowing along the X-axis direction to the blade body main area 32221. Therefore, the liquid resin flows along the Y-axis direction in the liquid receiving groove 322221 to the side of the blade main body 3222 and can fall by gravity and fall back into the liquid material tray 2100.

[0079] The liquid drainage structure may also include at least one liquid blocking protrusion 322222 disposed on the lower functional surface 32222b of the blade body functional portion 32222, wherein the liquid blocking protrusion 322222 is configured as a linear protrusion, and each of the liquid blocking protrusions 322222 is configured to be disposed transversely along the blade body of the scraper body 3222 on the lower functional surface 32222b of the blade body functional portion 32222. At this time, the blade body of the scraper body 3222 is configured to be transversely disposed along the lower functional surface 32222b of the blade body functional portion 32222 in the assembly. During operation, the linear protrusions arranged along the Y-axis direction and parallel to the Y-axis direction can form a barrier to the liquid resin. At this time, since the liquid resin moves on the lower functional surface 32222b, it is only necessary to block the liquid resin from flowing along the X-axis direction toward the main area 32221 of the blade body, so that the liquid resin can fall relative to the scraper body 3222 by gravity and fall back into the liquid material tray 2100. Therefore, the drainage method is different from the above-mentioned drainage along the Y-axis direction on the upper functional surface 32222a.

[0080] Continue reading Figure 6 As shown, the liquid receiving groove 322221 is configured to be defined by a virtual depth line 322221a. The virtual depth line 322221a is a virtual line, which is mainly used to indicate the trajectory of the liquid receiving groove 322221 opened in the depth square. Therefore, the groove depth of the liquid receiving groove 322221 is configured to be opened along the virtual depth line 322221a. At this time, it can be defined that the virtual depth line 322221a has an inclined angle relative to the upper functional surface 32222a of the blade functional part 32222, and the virtual depth line 322221a is set along the blade body longitudinal direction of the blade body 3222. Figure 6 As shown, the liquid receiving groove 322221 defined by the virtual depth line 322221a can make the groove opening roughly along the X-axis direction tilted toward the molding table 2200, rather than making the groove opening of the liquid receiving groove 322221 face the Z-axis direction after being opened on the upper functional surface 32222a. This tilted groove design can make the groove opening of the liquid receiving groove 322221 face the liquid resin roughly along the X-axis direction and smoothly receive the liquid resin during the process of the scraper body 3222 scraping off the model part, thereby improving the drainage function of the liquid resin.

[0081] Continue reading Figures 6 to 8As shown, the lower functional surface 32222b of the blade functional part 32222 is divided into at least three lower unit surfaces 32222b1, and a plurality of the lower unit surfaces 32222b1 are arranged longitudinally along the blade of the blade main body 3222, and at least one liquid blocking protrusion 322222 is provided between adjacent lower unit surfaces 32222b1, wherein different lower unit surfaces 32222b1 have different surface inclinations. Therefore, different surface inclinations can make different lower unit surfaces 32222b1 have different drainage effects on liquid resin, and the greater the surface inclination, the easier it is for liquid resin to fall by gravity.

[0082] In one embodiment, the lower functional surface 32222b of the blade functional part 32222 is divided into three lower unit surfaces 32222b1, and one of the liquid blocking protrusions 322222 is provided between adjacent lower unit surfaces 32222b1, and adjacent lower unit surfaces 32222b1 are separated based on one of the liquid blocking protrusions 322222 between the two, wherein the surface inclination of one of the lower unit surfaces 32222b1 located in the middle of the three lower unit surfaces 32222b1 is smaller than the surface inclinations of the other two lower unit surfaces 32222b1. In addition, those skilled in the art can also design the surface inclination of each liquid blocking protrusion 322222 and each lower unit surface 32222b1 according to actual needs, which is not limited here.

[0083] In one embodiment, the interior of the frame main body 3241 has a frame inner space that passes through from top to bottom, the frame main body 3241 is equipped with a model receiving box 3243, and the model receiving box 3243 is located in the frame inner space, the model receiving box 3243 is rotatably assembled on the frame main body 3241, and the box body receiving port of the model receiving box 3243 is configured to be rotated to face upward toward the scraper assembly 3220 or to face downward away from the scraper assembly 3220. Therefore, when the box body receiving port of the model receiving box 3243 is rotated to face upward toward the scraper assembly 3220, the model pieces shoveled off by the scraper body 3222 can directly fall into the model receiving box 3243 by gravity. If the capacity of the model receiving box 3243 is reached or the model parts have been received, the box body receiving port of the model receiving box 3243 can also be rotated downward away from the scraper assembly 3220. At this time, all the model parts received by the model receiving box 3243 can further fall from the model receiving box 3243 by gravity.

[0084] At this time, a model collection box 3300 with a larger capacity can be set below the model receiving box 3243 for collecting all model parts, which is not limited here. For example, in one embodiment, the automatic unloading device 3000 includes a model collection box 3300, which is detachably assembled on the device base 3100, wherein the model collection box 3300 is located below the scraper assembly 3220, and the model collection box 3300 is configured to collect model parts.

[0085] In one embodiment, the model receiving box 3243 has a front side and a rear side of the box body, wherein the front side of the box body of the model receiving box 3243 is the direction toward the forming table 2200 along the X-axis direction, and the rear side of the box body of the model receiving box 3243 is the direction away from the forming table 2200 along the X-axis direction, the front side of the box body of the model receiving box 3243 is fixedly rotated and assembled on the frame main body 3241, the bottom wall of the box body of the model receiving box 3243 is configured as a curved wall surface, and the curvature of the curved wall surface of the bottom wall of the box body gradually increases in the direction from the front side of the box body to the rear side of the box body, so that the gradually changing curvature can make the model part fall out of the model receiving box 3243 smoothly.

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A blade assembly, characterized in that: The blade assembly comprises: Component seat; A scraper blade body, the scraper blade body is assembled on the component base, the scraper blade body includes a connected main blade body portion and a blade body functional portion, wherein the scraper blade body is configured to have a mutually perpendicular blade body transverse direction and a blade body longitudinal direction, the main blade body portion and the blade body functional portion are configured to be arranged along the blade body longitudinal direction, and the area of ​​the main blade body portion is larger than the area of ​​the blade body functional portion; wherein the blade body functional portion has an upper functional surface and a lower functional surface facing opposite directions, at least one of the upper functional surface and the lower functional surface is provided with a liquid drainage structure, and the liquid drainage structure is configured to guide liquid printing material to flow outside the main blade body portion.

2. The blade assembly according to claim 1, characterized in that: The liquid drainage structure comprises: At least one liquid receiving groove is provided on the upper functional surface of the blade functional portion, wherein the liquid receiving groove is configured as a linear groove, and each of the liquid receiving grooves is configured to be arranged transversely along the blade of the blade body on the upper functional surface of the blade functional portion; and / or, At least one liquid blocking protrusion is arranged on the lower functional surface of the blade body functional part, and the liquid blocking protrusion is configured as a linear protrusion. Each of the liquid blocking protrusions is configured to be arranged on the lower functional surface of the blade body functional part transversely along the blade body of the scraper body.

3. The blade assembly according to claim 2, characterized in that: The liquid receiving groove is configured to define a virtual depth line, and the groove depth of the liquid receiving groove is configured to be opened along the virtual depth line, wherein the virtual depth line has an inclined angle relative to the upper functional surface of the blade functional part, and the virtual depth line is arranged along the longitudinal direction of the blade body of the scraper body.

4. The blade assembly according to claim 2, characterized in that: The lower functional surface of the blade functional part is divided into at least three lower unit surfaces, several of which are arranged longitudinally along the blade of the blade main body, and at least one liquid blocking protrusion is provided between adjacent lower unit surfaces, wherein different lower unit surfaces have different surface inclinations.

5. The blade assembly according to claim 4, characterized in that: The lower functional surface of the functional part of the blade body is divided into three lower unit surfaces, one of the liquid blocking protrusions is arranged between adjacent lower unit surfaces, and adjacent lower unit surfaces are separated based on one of the liquid blocking protrusions therebetween, wherein a surface inclination of a lower unit surface located in the middle of the three lower unit surfaces is smaller than the surface inclinations of the other two lower unit surfaces.

6. The blade assembly according to claim 1, characterized in that: The blade body is elastically and movably assembled on the component base.

7. The blade assembly according to claim 6, characterized in that: The blade assembly comprises: The blade transfer platform is elastically and movably mounted on the component base, and the blade body is mounted on the blade transfer platform, thereby being indirectly and elastically and movably mounted on the component base through the blade transfer platform.

8. A scraper module, characterized in that: The blade module comprises: A module platform, wherein the module platform is provided with a blade movement track; The blade assembly as described in any one of claims 1-7, wherein the blade assembly is movably mounted on the module platform along the blade motion track, the blade motion track is configured as a linear track, and the blade assembly is configured to reciprocate along the blade motion track relative to the module platform.

9. An automatic unloading device, characterized in that: The automatic unloading device comprises: A device base, wherein the device base is provided with a module motion track; The blade module as described in claim 8, the blade module is movably assembled on the device base along the module motion track, the module motion track is configured as a linear track, and the module motion track and the blade motion track of the blade module are parallel to each other.

10. A 3D printing system, characterized in that: The 3D printing system comprises: System base; A 3D printer, the 3D printer is mounted on the system base, wherein the 3D printer comprises a machine body, a liquid material tray and a molding table mounted on the machine body, the molding table is movably mounted on the machine body, and the molding table is configured to move closer to or farther from the liquid material tray on the machine body; The automatic unloading device as described in claim 9 is assembled on the system base.

Images