Material guiding mechanism, 3D printing effector and 3D printer

Abstract

The application discloses a material guiding mechanism, a 3D printing effector and a 3D printer, and relates to the technical field of intelligent manufacturing. The outer wall shape of the second shell is matched with the inner wall shape of the accommodating groove, so that the outer wall of the second shell and the inner wall of the accommodating groove can be well matched after the second shell is accommodated in the accommodating groove, a material guiding channel is formed, a plurality of wires can enter from one end of different material guiding channels, and the wires can be guided through the material guiding channels, converged from the middle discharging channel and guided to a nozzle for printing. Thus, the material guiding channel can be directly formed by processing the inner wall of the accommodating groove and / or the outer wall of the second shell, and the processing difficulty is reduced. In addition, the inner wall of the second shell forms a recessed cavity which is recessed towards the discharging channel, so that the second shell has a hollow structure and is light in weight, thereby reducing the weight and volume of the entire effector and improving the printing speed.

Description

Technical Field

[0001] This application relates to the field of intelligent manufacturing technology, and in particular to a material guiding mechanism, a 3D printing effector, and a 3D printer. Background Technology

[0002] In recent years, 3D printing has developed rapidly, and market demand has become increasingly diversified. Multi-material rapid printing has become a future trend. Currently, in order to achieve multi-color printing, some 3D printers are equipped with multiple extrusion mechanisms and a nozzle. Each extrusion mechanism receives a filament of a corresponding material color and selects the appropriate filament color to supply to the nozzle for printing. This requires a feeding mechanism to supply the required filament to the nozzle and facilitate the return of consumables, ensuring an orderly supply of printing consumables and improving printing efficiency.

[0003] However, existing multicolor printers integrate multiple extrusion mechanisms on the effector itself, making them significantly heavier and larger than single-color printers. Adding a feeding device further increases the weight and size of the effector, and the bulky printhead affects printing speed. Furthermore, the integrated design of the feeding mechanism increases the manufacturing difficulty, especially since the internal components require multiple relatively smooth channels, increasing the probability of quality problems (uneven feeding) and resulting in low processing efficiency. Utility Model Content

[0004] The purpose of this application is to provide a material guiding mechanism, a 3D printing effector, and a 3D printer, which reduces processing difficulty, increases processing efficiency, and allows the material guiding channel to be designed to be smoother, improving material guiding smoothness and reducing weight.

[0005] The embodiments of this application can be implemented as follows:

[0006] In a first aspect, this utility model provides a material guiding mechanism, comprising:

[0007] The first housing has a receiving groove and a discharge channel communicating with the receiving groove;

[0008] The second housing has an outer wall shape that matches the inner wall shape of the receiving groove. The second housing is housed in the receiving groove. The inner wall of the second housing forms a recessed cavity facing the discharge channel. At least two material guiding channels are formed between the outer wall of the second housing and the inner wall of the receiving groove. One end of the material guiding channel extends away from the discharge channel, and the other end of the material guiding channel is connected to the discharge channel.

[0009] In an optional embodiment, the material guiding channel includes a first arc segment and a second arc segment connected together. The end of the first arc segment away from the second arc segment extends to the opening of the receiving groove, and the end of the second arc segment away from the first arc segment communicates with the discharge channel. The bending protrusion of the first arc segment faces the outside of the receiving groove, and the bending protrusion of the second arc segment faces the inside of the receiving groove.

[0010] In an optional embodiment, the central angle of both the first arc segment and the second arc segment is less than 90°, and the material guide channel further includes an inclined segment connecting the first arc segment and the second arc segment, wherein the central axis of the inclined segment is tangent to the central axis of both the first arc segment and the second arc segment.

[0011] In an optional embodiment, at least two first grooves are provided on the outer wall of the second housing, and the inner wall of the first groove and the inner wall of the receiving groove together form the material guiding channel.

[0012] or,

[0013] At least two second grooves are provided on the inner sidewall of the first housing, and the inner wall of the second groove and the outer sidewall of the second housing together form the material guiding channel;

[0014] or,

[0015] The inner wall of the first housing is provided with at least two first grooves, and the outer wall of the second housing is provided with at least two second grooves. The first grooves and the second grooves correspond one-to-one, and the inner wall of each first groove and the inner wall of the corresponding second groove together form a material guiding channel.

[0016] In an optional implementation, the feeding mechanism includes at least one of the following items:

[0017] Firstly: The first housing has at least two first notches communicating with the receiving groove on one side, and each first notch surrounds the receiving groove; the second housing has at least two second notches spaced circumferentially on the edge of the side for forming the recessed cavity; the positions of the first notches and the second notches correspond one-to-one; each first notch and one second notch together form a feed inlet, and one end of each guide channel communicates with a feed inlet; the inner diameter of the feed inlet is larger than the inner diameter of the guide channel;

[0018] Second item: The material guiding channel and the material discharging channel have a rounded transition;

[0019] Thirdly: The discharge channel is funnel-shaped, and the inner diameter of at least a portion of the discharge channel gradually increases from the end of the discharge channel away from the guide channel to the end connected to the guide channel;

[0020] Fourthly: On the outer wall of the second housing, a blocking part is provided in the central area of ​​the end where each of the material guiding channels and the material discharging channel communicates.

[0021] In an optional embodiment, the first housing has a first connecting groove on the side where the receiving groove is formed, and the first connecting groove communicates with the receiving groove; the second housing has a first connecting ear on its outer peripheral side, and the first connecting ear is fixedly connected to the first connecting groove.

[0022] In an optional embodiment, the first housing is further provided with a number of positioning holes equal to the number of the material guide channels on one side for forming the receiving groove, and each positioning hole surrounds the receiving groove, and the positioning holes are used for the insertion of the positioning pins of the extrusion mechanism.

[0023] Secondly, this utility model provides a 3D printing effector, including a fixing frame, a nozzle, at least two extrusion mechanisms, and a material guiding mechanism as described in the above embodiments;

[0024] The nozzle is connected to the first housing at a position corresponding to and communicating with the discharge channel via a fixing bracket, and the nozzle is located on the side of the discharge channel away from the receiving tank;

[0025] The output tube of each extrusion unit is connected to a feed channel.

[0026] In an optional embodiment, the mounting bracket has a second connecting lug, the first housing has a second connecting groove, and the second connecting lug is fixedly connected to the second connecting groove.

[0027] Thirdly, this utility model provides a 3D printer, including the 3D printing effector of the aforementioned embodiments.

[0028] Compared with the prior art, the beneficial effects of the embodiments of this application include, for example:

[0029] By adapting the outer wall shape of the second housing to match the inner wall shape of the receiving groove, a better fit can be achieved between the outer wall of the second housing and the inner wall of the receiving groove after the second housing is installed in the receiving groove, thus forming a material guiding channel. Since one end of the material guiding channel extends away from the discharge channel and the other end of the material guiding channel is connected to the discharge channel, various wires can enter from one end of different material guiding channels, and after being guided by each material guiding channel, they converge from the middle discharge channel and are then guided to the nozzle for printing. In this way, the material guiding channel can be formed directly on the inner wall of the receiving groove and / or the outer wall of the second housing. The flow guiding channel is formed by the separate assembly of the first housing and the second housing, which reduces the processing difficulty, increases the processing efficiency, and allows the material guiding channel to be designed to be smoother, improving the smoothness of material guiding.

[0030] Furthermore, because the inner wall of the second housing forms a recessed cavity facing the discharge channel, the second housing can be made into a hollow structure, which is lightweight, thereby reducing the weight and volume of the entire effector and improving the printing speed. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is one of the schematic diagrams of the 3D printing effector in the embodiments of this application;

[0033] Figure 2 This is a second schematic diagram of the 3D printing effector according to an embodiment of this application;

[0034] Figure 3 This is one of the exploded view diagrams of the 3D printed effector in the embodiments of this application;

[0035] Figure 4 This is the second exploded view of the 3D printed effector in the embodiments of this application;

[0036] Figure 5 for Figure 1 Schematic diagram of the central feeding mechanism;

[0037] Figure 6 for Figure 5 A cross-sectional diagram;

[0038] Figure 7 for Figure 1 One of the exploded schematic diagrams of the central material guiding mechanism;

[0039] Figure 8 for Figure 1 Explosion diagram of the central material guiding mechanism (Part 2).

[0040] Icons: 100-Guiding mechanism; 110-First housing; 111-Receiving groove; 112-Discharge channel; 114-First notch; 115-First connecting groove; 116-First threaded hole; 117-Second connecting groove; 118-Second threaded hole; 119-Positioning hole; 120-Second housing; 121-Second notch; 122-First connecting lug; 123-First through hole; 124-First groove; 125-Recessed cavity; 126-Blocking part; 130-Guiding channel; 131-First arc segment; 132-Inclined segment; 133-Second arc segment; 134-First central axis; 135-Intermediate central axis; 136-Second central axis; 140-Inlet; 200-Extrusion mechanism; 210-Output pipe; 211-Positioning post; 300-Fixing frame; 310-Second connecting lug; 311-Second through hole; 400-Nozzle. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0048] This application discloses a material guiding mechanism 100 and a 3D printing effector having the material guiding mechanism 100.

[0049] 3D printing effectors are an important component of 3D printing equipment. As a device connecting the nozzle and moving components (usually a control arm) of the 3D printing equipment, the effector directly affects the operating speed and output quality of the 3D printing machine. 3D printing effectors are typically a support structure and contain numerous functional components.

[0050] refer to Figures 1 to 4The 3D printing effector includes a feeding mechanism 100, a nozzle 400, a retainer 300, and an extrusion mechanism 200. The extrusion mechanism 200 is located on the feeding mechanism 100, and the two are fixed relative to each other so that the material filament provided by the extrusion mechanism 200 can be provided to the nozzle 400 through the feeding channel 130 of the feeding mechanism 100. The retainer 300 is located on the side of the feeding mechanism 100 opposite to the extrusion mechanism 200. The retainer 300 is used to fix the nozzle 400. The nozzle 400 is used to receive the material filament pulled by the feeding channel 130 of the feeding mechanism 100 to realize the printing function.

[0051] Combination Figure 5 and Figure 6 The material guiding mechanism 100 includes a first housing 110 and a second housing 120. The first housing 110 has a receiving groove 111 and a discharge channel 112 communicating with the receiving groove 111. The outer wall shape of the second housing 120 is adapted to the inner wall shape of the receiving groove 111. The second housing 120 is housed in the receiving groove 111. The inner wall of the second housing 120 is recessed towards the discharge channel 112. At least two material guiding channels 130 are formed between the outer wall of the second housing 120 and the inner wall of the receiving groove 111. One end of the material guiding channel 130 extends away from the discharge channel 112, and the other end of the material guiding channel 130 communicates with the discharge channel 112.

[0052] In this way, by setting the outer wall shape of the second housing 120 to match the inner wall shape of the receiving groove 111, a better fit can be achieved between the outer wall of the second housing 120 and the inner wall of the receiving groove 111 after the second housing 120 is installed in the receiving groove 111, thereby forming a material guiding channel 130. Since one end of the material guiding channel 130 extends away from the discharge channel 112, and the other end of the material guiding channel 130 is connected to the discharge channel 112, various wires can enter from one end of different material guiding channels 130, and after being guided by each material guiding channel 130, they converge from the middle discharge channel 112 and are then guided to the nozzle 400 for printing. In this way, the material guiding channel 130 can be formed by processing directly on the inner wall of the receiving groove 111 and / or the outer wall of the second housing 120. The flow guiding channel is formed by the separate assembly of the first housing 110 and the second housing 120, which reduces the processing difficulty, increases the processing efficiency, and allows the material guiding channel 130 to be designed to be smoother, improving the smoothness of material guiding. Furthermore, since the inner wall of the second housing 120 forms a recessed cavity 125 that faces the discharge channel 112, the second housing 120 can be made into a hollow structure, which is lightweight, thereby reducing the weight and volume of the entire effector and improving the printing speed.

[0053] The filament or wire used in this application, also known as the fused wire, is a thermoplastic material. After the effector heats the solid filament, it melts into a molten filament, which the effector can then extrude for 3D printing. Optionally, the filament can be made of materials such as ABS (Acrylonitrile Butadiene Styrene), PLA (polylactic acid), PETG (amorphous copolyester), or PET (polyethylene terephthalate).

[0054] In this design, the filaments in different feed channels 130 can be the same color but different materials, allowing the 3D printing effector to print filaments of different materials in a single color. The printing color of the filaments in different feed channels 130 can also be different, so the 3D printing effector can be used for multi-color printing, with each feed channel 130 used to transport filaments of different printing colors.

[0055] For example, the first housing 110 may be approximately 7 and Figure 8 The hollow cone-shaped receiving groove 111 shown has a smooth, wrinkle-free inner wall. The material guiding channel 130 is formed by setting a first groove 124 only on the outer wall of the second housing 120. Specifically, at least two first grooves 124 are provided on the outer wall of the second housing 120. The inner wall of the first groove 124 and the inner wall of the receiving groove 111 together form the material guiding channel 130. In this way, only the outer wall of the second housing 120 needs to be processed, which can reduce the process steps and improve the processing efficiency of the material guiding mechanism 100.

[0056] Furthermore, it is understood that, in order to facilitate the connection between the output pipe 210 of the extrusion mechanism 200 and the material guide channel 130, at least two feed ports 140 are formed between the first housing 110 and the second housing 120. The inner diameter of the feed port 140 is larger than the inner diameter of the material guide channel 130, and one end of each material guide channel 130 is connected to a feed port 140.

[0057] Specifically, in order to form the feed inlet 140, the first housing 110 has at least two first notches 114 communicating with the receiving groove 111 on one side, and each first notch 114 surrounds the receiving groove 111.

[0058] The second housing 120 is also generally hollow conical or funnel-shaped without openings. At least two second notches 121 are provided on the edge of the side of the second housing 120 used to form the recessed cavity 125. The second notches 121 penetrate the side of the second housing 120 opposite to the discharge channel 112. The first notch 114 and the second notch 121 correspond one to one. Each first notch 114 and a second notch 121 together form a feed port 140. This ensures that the feed port 140 has a sufficient inner diameter for the output pipe 210 of the extrusion mechanism 200 to be inserted.

[0059] Of course, in some embodiments not shown, at least two second grooves may be machined only on the inner wall of the receiving groove 111. The inner wall of the second groove and the outer wall of the second housing 120 together form the material guiding channel 130. Correspondingly, only the first notch 114 may be machined on the first housing 110, and the second notch 121 may not be machined on the second housing 120. The first notch 114 directly connects to the output pipe 210. Alternatively, at least two first grooves may be machined on the inner wall of the receiving groove 111, and at least two second grooves may be machined on the outer wall of the second housing 120. The first grooves and the second grooves correspond one-to-one, and the inner wall of each first groove and the inner wall of one second groove together form a material guiding channel 130.

[0060] Furthermore, depending on actual needs, the first shell 110 and the second shell 120 can also be hollow pyramidal, cylindrical, prismatic, or other regular or irregular hollow structures. The embodiments do not limit the specific shape.

[0061] Continue to refer to Figure 4 , Figure 5 and Figure 7 In order to facilitate the precise positioning of each extrusion mechanism 200 corresponding to each feed port 140, the first housing 110 is provided with the same number of positioning holes 119 as the material guide channel 130 on the side used to form the receiving groove 111. Each positioning hole 119 surrounds the receiving groove 111 and is used for the positioning post 211 of the extrusion mechanism 200 to be inserted.

[0062] The number of positioning holes 119, feed inlets 140, and guide channels 130 in the figure are all four. Of course, in some embodiments, there may be two, three, five, six, seven, eight, nine, ten, or more than ten, depending on the number of color types to be combined. This application does not impose any specific restrictions on this.

[0063] For details, please refer to [link / reference]. Figure 6The guide channel 130 includes a first arc segment 131 and a second arc segment 133 connected together. The end of the first arc segment 131 away from the second arc segment 133 extends to the opening of the receiving groove 111, and the end of the second arc segment 133 away from the first arc segment 131 communicates with the discharge channel 112. In this way, the transition between the two arc segments ensures the smoothness of the wire moving from the outside to the middle of the discharge channel 112.

[0064] More specifically, the bending protrusion of the first arc segment 131 faces the outside of the receiving groove 111, and the bending protrusion of the second arc segment 133 faces away from the inside of the receiving groove 111. In this way, after the wire enters from the feed port 140, it gradually changes direction and moves towards the middle through the first arc segment 131, and then gradually changes direction through the second arc segment 133 to merge into the discharge channel 112, resulting in better smoothness.

[0065] The central angles of the first arc segment 131 and the second arc segment 133 are both less than 90°. The material guide channel 130 also includes an inclined segment 132 connecting the first arc segment 131 and the second arc segment 133. The central axis of the inclined segment 132 is tangent to the central axis of both the first arc segment 131 and the second arc segment 133. Specifically, as shown below... Figure 6 As shown, the central axis of the first arc segment 131 is the first central axis 134, the central axis of the inclined segment 132 is the intermediate central axis 135, and the central axis of the second arc segment 133 is the second central axis 136. The first central axis 134, the intermediate central axis 135, and the second central axis 136 are connected sequentially. The first central axis 134 is tangent to the intermediate central axis 135, and the intermediate central axis 135 is tangent to the second central axis 136. This ensures that the wire continues to move along the axial direction of the discharge channel 112 at the speed component when passing through the first arc segment 131 and the second arc segment 133 and at the junction, thus better ensuring smoothness. The inclined segment 132 refers to a segment that is inclined at an acute angle relative to the axial direction of the discharge channel 112.

[0066] On the outer wall of the second housing 120, a blocking portion 126 is provided in the central region of the end where each material guide channel 130 communicates with the discharge channel 112. The blocking portion 126 protrudes and extends toward the discharge channel 112, and its shape is not specifically limited. For example, it can be... Figure 6 The cone shape shown can also be a pyramid, frustum, truncated cone, cylinder, or other regular or irregular shapes.

[0067] In this way, the blocking part 126 can prevent the wires in one guide channel 130 from crossing into another guide channel 130, ensuring that all kinds of wires are stably gathered and discharged into the discharge channel 112.

[0068] The discharge channel 112 is funnel-shaped, and at least part of the inner diameter of the discharge channel 112 gradually increases from the end away from the guide channel 130 to the end connected to the guide channel 130. In this way, the funnel-shaped discharge channel 112 can play a converging role, ensuring that different wires can be better converged from different guide channels 130 to the discharge channel 112 during multi-color printing.

[0069] The material guide channel 130 and the material discharge channel 112 have a rounded transition, that is, the second arc segment 133 of the material guide channel 130 and the material discharge channel 112 have a rounded transition. This can ensure the smoothness of the wire being transported from the second arc segment 133 to the material discharge channel 112.

[0070] In order to achieve the assembly of the first housing 110 and the second housing 120, combined Figure 7 Therefore, the first housing 110 has a first connecting groove 115 on one side where the receiving groove 111 is formed, and the first connecting groove 115 communicates with the receiving groove 111; the second housing 120 has a first connecting ear 122 on its outer periphery, and the first connecting ear 122 is fixedly connected to the first connecting groove 115.

[0071] The first connecting lug 122 can be fixedly connected to the first connecting groove 115 by a screw connection, which also facilitates assembly, disassembly and maintenance. For example, the first connecting lug 122 is provided with a first through hole 123, and the bottom of the first connecting groove 115 is provided with a first threaded hole 116. The first screw passes through the first through hole 123 and is threadedly connected to the first threaded hole 116. The first through hole 123 can be a countersunk through hole, so that the head of the first screw can be recessed into the first housing 110 to ensure the flatness of the appearance.

[0072] It should be noted that the number of first connecting ears 122 and the number of first connecting slots 115 are not specifically limited. For example, there can be one, two or more, as long as the one-to-one corresponding installation is guaranteed. When there are two or more first connecting ears 122 and first connecting slots 115, each first connecting slot 115 is distributed around the receiving slot 111 at intervals, and each first connecting ear 122 is distributed at intervals along the circumference of the second housing 120.

[0073] Of course, in some embodiments, the first connecting ear 122 may also be bonded, welded, riveted, etc. to the inner wall of the first connecting groove 115, and the specific connection method is not specifically limited.

[0074] Alternatively, the first connecting ear 122 and the first connecting groove 115 may not be provided. For example, it is also feasible to directly glue the second housing 120 to the first housing 110 on the inner wall of the second housing 120 in areas other than the first groove 124.

[0075] In this embodiment, refer to Figure 4 In order to assemble the fixing frame 300 with the first housing 110, the fixing frame 300 has a second connecting ear 310, the first housing 110 has a second connecting groove 117, and the second connecting ear 310 is fixedly connected in the second connecting groove 117.

[0076] The second connecting ear 310 can be fixedly connected to the second connecting groove 117 by screwing, which is also convenient for assembly, disassembly and maintenance. For example, the second connecting ear 310 is provided with a second through hole 311, the bottom of the second connecting groove 117 is provided with a second threaded hole 118, and the second screw passes through the second through hole 311 and is threadedly connected to the second threaded hole 118.

[0077] Of course, in some embodiments, the second connecting ear 310 may also be bonded, welded, riveted, etc. to the inner wall of the second connecting groove 117, and the specific connection method is not specifically limited.

[0078] Alternatively, the second connecting ear 310 and the second connecting groove 117 may not be provided. For example, it is also feasible to directly bond or weld the first housing 110 to the fixing frame 300 on the outer wall.

[0079] It should be noted that the number of second connecting ears 310 and the number of second connecting slots 117 are not specifically limited. For example, there can be one, two or more, as long as the one-to-one corresponding insertion is guaranteed. When there are two or more second connecting ears 310 and second connecting slots 117, each second connecting slot 117 is distributed at intervals around the discharge channel 112, and each second connecting ear 310 is distributed at intervals along the circumference of the nozzle 400.

[0080] The nozzle 400 can be fixed relative to the bracket 300 by passing the nozzle 400 through the bracket 300 and then using methods such as bonding.

[0081] In addition, this application also discloses a 3D printer, which includes the 3D printing effector of the above embodiments, and therefore also has the corresponding structure and beneficial effects, which will not be described in detail here, but referred to the above content.

[0082] In summary, this application discloses a material guiding mechanism 100, a 3D printing effector, and a 3D printer. By adapting the outer wall shape of the second housing 120 to match the inner wall shape of the receiving groove 111, a good fit can be achieved between the outer wall of the second housing 120 and the inner wall of the receiving groove 111 after the second housing 120 is inserted into the receiving groove 111, thereby forming a material guiding channel 130. Since one end of the material guiding channel 130 extends away from the discharge channel 112, the other end of the material guiding channel 130 is connected to the discharge channel 112. Therefore, multiple filaments can enter from one end of different guide channels 130, and after being guided by each guide channel 130, they converge from the middle discharge channel 112 and are then guided to the nozzle 400 for printing. This allows the guide channels 130 to be formed directly on the inner wall of the receiving groove 111 and / or the outer wall of the second housing 120. The flow channel is formed by the separate assembly of the first housing 110 and the second housing 120, reducing processing difficulty and increasing processing efficiency. Furthermore, the guide channels 130 can be designed to be smoother, improving the smoothness of material flow. In addition, since the inner wall of the second housing 120 forms a recessed cavity 125 facing the discharge channel 112, the second housing 120 can have a hollow structure, making it lightweight and reducing the overall weight and volume of the effector, thus increasing printing speed.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A material guiding mechanism, characterized in that, include: The first housing (110) has a receiving groove (111) and a discharge channel (112) communicating with the receiving groove (111); The second housing (120) has an outer wall shape that matches the inner wall shape of the receiving groove (111). The second housing (120) is housed in the receiving groove (111). The inner wall of the second housing (120) forms a recessed cavity (125) that is recessed toward the discharge channel (112). At least two material guiding channels (130) are formed between the outer wall of the second housing (120) and the inner wall of the receiving groove (111). One end of the material guiding channel (130) extends away from the discharge channel (112), and the other end of the material guiding channel (130) communicates with the discharge channel (112).

2. The material guiding mechanism according to claim 1, characterized in that, The material guiding channel (130) includes a first arc segment (131) and a second arc segment (133) connected together. The end of the first arc segment (131) away from the second arc segment (133) extends to the opening of the receiving groove (111). The end of the second arc segment (133) away from the first arc segment (131) is connected to the discharge channel (112). The bending protrusion of the first arc segment (131) faces the outside of the receiving groove (111), and the bending protrusion of the second arc segment (133) faces the inside of the receiving groove (111).

3. The material guiding mechanism according to claim 2, characterized in that, The central angle of the first arc segment (131) and the central angle of the second arc segment (133) are both less than 90°. The material guide channel (130) also includes an inclined segment (132) connected between the first arc segment (131) and the second arc segment (133). The central axis of the inclined segment (132) is tangent to the central axis of the first arc segment (131) and the central axis of the second arc segment (133).

4. The material guiding mechanism according to claim 1, characterized in that, The outer wall of the second housing (120) is provided with at least two first grooves (124), and the inner wall of the first groove (124) and the inner wall of the receiving groove (111) together form the material guiding channel (130); or, At least two second grooves are provided on the inner sidewall of the first housing (110), and the inner wall of the second groove and the outer sidewall of the second housing (120) together form the material guiding channel (130); or, The inner wall of the first housing (110) is provided with at least two first grooves, and the outer wall of the second housing (120) is provided with at least two second grooves. The first grooves and the second grooves correspond one to one, and the inner wall of each first groove and the inner wall of the corresponding second groove together form a material guiding channel (130).

5. The material guiding mechanism according to any one of claims 1-4, characterized in that, The feeding mechanism includes at least one of the following items: (first to fourth) Firstly: The first housing (110) has at least two first notches (114) communicating with the receiving groove (111) on one side, and each first notch (114) surrounds the receiving groove (111); the second housing (120) has at least two second notches (121) circumferentially spaced on the edge of the side for forming the recessed cavity (125); the first notches (114) and the second notches (121) are respectively positioned one-to-one; each first notch (114) and a second notch (121) together form a feed inlet (140), and one end of each guide channel (130) is connected to a feed inlet (140); the inner diameter of the feed inlet (140) is larger than the inner diameter of the guide channel (130); Second: The material guiding channel (130) and the material discharging channel (112) have a rounded transition; The third item: The discharge channel (112) is funnel-shaped, and from the end of the discharge channel (112) away from the guide channel (130) to the end connected to the guide channel (130), the inner diameter of at least a portion of the discharge channel (112) gradually increases; Fourth item: On the outer wall of the second housing (120), a blocking part (126) is provided in the central area of ​​the end where each of the material guiding channels (130) and the material discharge channel (112) are connected.

6. The material guiding mechanism according to any one of claims 1-4, characterized in that, The first housing (110) has a first connecting groove (115) on one side where the receiving groove (111) is formed, and the first connecting groove (115) communicates with the receiving groove (111); the second housing (120) has a first connecting ear (122) on its outer periphery, and the first connecting ear (122) is fixedly connected to the first connecting groove (115).

7. The material guiding mechanism according to any one of claims 1-4, characterized in that, The first housing (110) is provided with a number of positioning holes (119) on one side for forming the receiving groove (111) as the number of the material guiding channels (130). Each positioning hole (119) surrounds the receiving groove (111) and is used for the positioning pin (211) of the extrusion mechanism (200) to be inserted.

8. A 3D printed effector, characterized in that, It includes a fixing frame (300), a nozzle (400), at least two extrusion mechanisms (200), and a feeding mechanism as described in any one of claims 1-7; The nozzle (400) is connected to the first housing (110) via the fixing frame (300) at a position corresponding to and communicating with the discharge channel (112), and the nozzle (400) is located on the side of the discharge channel (112) away from the receiving groove (111); The output pipe (210) of each of the extrusion mechanisms (200) is connected to one of the feed channels (130).

9. The 3D printing effector according to claim 8, characterized in that, The mounting bracket (300) has a second connecting ear (310), and the first housing (110) has a second connecting groove (117). The second connecting ear (310) is fixedly connected to the second connecting groove (117).

10. A 3D printer, characterized in that, Includes the 3D printing effector as described in claim 8 or 9.

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