Material cutting mechanism, spray head assembly applying material cutting mechanism and 3D printing device

Abstract

The embodiment of the utility model provides a material cutting mechanism, a spray head assembly applying the material cutting mechanism and a 3D printing device. The material cutting mechanism is used for cutting the consumables passing through the conveying channel and comprises a bearing part, a material cutting mechanism and a material cutting mechanism, and the conveying channel penetrates through the bearing part; the first shearing piece is rotationally connected with the bearing piece; the second shearing piece is rotationally connected with the first shearing piece, and the first shearing piece and the second shearing piece are arranged on the same side of the bearing piece; the pushing part is rotationally connected with the second shearing part and drives the second shearing part to intrude into the conveying channel. The spray head assembly is provided with a conveying channel used for conveying consumables and further comprises a feeding mechanism, a hot end and a material cutting mechanism. The conveying channel penetrates through the feeding mechanism, and the feeding mechanism is used for conveying the consumables; the transmission channel penetrates through the hot end and is provided with the hot end for heating the consumables; the feeding mechanism and the hot end are connected with the bearing piece. The 3D printing device comprises a forming platform, a driving assembly and a nozzle assembly, and the driving assembly drives the nozzle assembly to move relative to the forming platform.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to a material cutting mechanism, a nozzle assembly using the same, and a 3D printing device. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies special wax materials, powdered metals, plastics, or other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling (FDM) is one of the main 3D printing technologies. In this technology, a thermoplastic filament is heated and melted and then extruded from a nozzle, deposited on a forming platform or the previously solidified material of the previous layer, and finally a physical object is generated. Among them, fused deposition modeling (FDM) is a 3D printing technology that uses thermoplastic polymer materials. These materials are heated and melted by a nozzle, extruded, and deposited on a printing platform layer by layer to form a three-dimensional object. Further, multi-color FDM printing technology refers to using plastic filaments of multiple colors in a printing project, so that a colored or multi-color 3D model can be printed without the need for later coloring or painting.

[0003] However, since the consumables of FDM are generally thermoplastic materials such as wax, ABS (acrylonitrile-butadiene-styrene copolymer), nylon, etc., the consumables are heated and melted in the nozzle, and the nozzle moves along the cross-sectional contour of the part and the filling trajectory, while extruding the melted material. The consumables quickly solidify and coagulate with the surrounding materials to complete the printing of the model. However, when an FDM-type 3D printer needs to print in a different color or replace the consumables, since the consumables close to the heating block or nozzle are prone to deformation due to melting, it is easy to cause the consumables in the feeding channel to adhere to the inner wall of the feeding channel when retracting, resulting in blockage of the feeding channel, and then causing the printing to be interrupted or the printing to fail.

[0004] How to solve the above problems, improve the efficiency of cutting the consumables, improve the quality of retracting the consumables, and improve the success rate of the next feeding is what those skilled in the art need to consider. Summary of the Utility Model

[0005] To solve the problems in the prior art, the embodiments of this application provide a nozzle assembly with high cutting efficiency and high quality of consumable recycling, and a 3D printing device using the same.

[0006] The embodiments of this application provide a material cutting mechanism. The material cutting mechanism is used to cut the consumables passing through a transmission channel. The material cutting mechanism includes:

[0007] A carrier member, and the transmission channel penetrates through the carrier member;

[0008] A first cutting member, which is rotatably connected to the carrier member;

[0009] A second shearing member, which is rotatably connected to the first shearing member, and the first shearing member and the second shearing member are arranged on the same side of the bearing member;

[0010] A pushing member, which is rotatably connected to the second shearing member and is used to drive the second shearing member to invade the transmission channel.

[0011] It can be understood that for the blanking mechanism of the present application, the first shearing member and the second shearing member are arranged on the same side of the bearing member, and they can cooperate with each other to achieve the invasion of the transmission channel penetrating the bearing member; if there is consumable material in the transmission channel, the consumable material can be cut. By driving the pushing member, the pushing member can drive the second shearing member to shear the consumable material. In this process, the second shearing member can rotate relative to the pushing member and the first shearing member, and the second shearing member shears the consumable material in a sliding-like manner. The cutting edge of the cut consumable material corresponds to a small length, reducing the fatigue of the fixed cutting edge, dispersing the force, and the cutting edge is not easily damaged.

[0012] In one embodiment, the bearing member includes an adjacent and joined first surface and a second surface, the transmission channel penetrates the first surface, the first shearing member and the second shearing member are both located on one side of the first surface, the pushing member includes a propulsion part and a reset part, the propulsion part is rotatably connected to the second shearing member, the reset part is connected to the propulsion part, the propulsion part is connected to the bearing member through a reset member, the propulsion part is arranged corresponding to the side where the first surface is located, and the reset part is arranged corresponding to the side where the second surface is located.

[0013] In one embodiment, the bearing member is formed with a receiving hole, the receiving hole is recessed from the second surface, the reset part protrudes towards the second surface to form a positioning post, one end of the reset member is received in the receiving hole, and the other end of the reset member is sleeved outside the positioning post.

[0014] In one embodiment, the propulsion part protrudes towards the first surface to form a connecting post, one end of the second shearing member is rotatably connected to the propulsion part through the connecting post, the bearing member is formed with a guiding groove, the guiding groove is recessed from the first surface, and the connecting post extends into the guiding groove.

[0015] In one embodiment, the second shearing member includes a spaced first end and a second end, the first end is rotatably connected to the first shearing member, the second end is rotatably connected to the pushing member, the second shearing member further includes a second cutting edge, the second cutting edge is located between the first end and the second end, and the second cutting edge is configured to face the transmission channel.

[0016] In one embodiment, the first shearing member includes a spaced third end and a fourth end. The third end is connected to the first end, and the fourth end is rotatably connected to the carrier. The fourth end is disposed on a side of the third end away from the second end, and the first shearing member is located on a side of the second shearing member away from the pushing member.

[0017] In one embodiment, the fourth end and the second end are spaced apart from each other along a first direction on opposite sides of the transmission channel. The carrier moves along the first direction to push the second shearing member. The first end and the second end are spaced apart from each other along a second direction on opposite sides of the transmission channel. The third end and the fourth end are spaced apart from each other along the second direction on opposite sides of the transmission channel. The first direction is perpendicular to the second direction.

[0018] In one embodiment, the fourth end and the second end are spaced apart from each other along a first direction on opposite sides of the transmission channel. The carrier moves along the first direction to push the second shearing member. The third end and the fourth end are disposed on the same side of the transmission channel along a second direction. The first direction is perpendicular to the second direction. The first shearing member further includes a first cutting edge located between the third end and the fourth end. The first cutting edge is configured to face the transmission channel. The first cutting edge and the second cutting edge face each other. The first cutting edge and the second cutting edge cooperate with each other to penetrate the transmission channel to shear the consumable.

[0019] An embodiment of the present application further provides a nozzle assembly. The nozzle assembly has a transmission channel for transmitting a consumable. The nozzle assembly further includes a feeding mechanism, a hot end, and a material breaking mechanism. The transmission channel passes through the feeding mechanism, and the feeding mechanism is used for conveying the consumable. The transmission channel passes through the hot end, and the hot end is used for heating the consumable. The feeding mechanism and the hot end are respectively connected to the carrier.

[0020] An embodiment of the present application further provides a 3D printing device, which includes a forming platform, a driving component, and the nozzle assembly as described in the foregoing embodiment. The driving component drives the nozzle assembly to move relative to the forming platform.

[0021] It can be understood that the nozzle assembly and the 3D printing device using the same have a feeding mechanism and a hot end to continuously heat and extrude the consumable material for printing. The transmission channel is arranged through the feeding mechanism and the hot end to ensure the continuity of the consumable material feeding. The material cutting mechanism is located between the feeding mechanism and the hot end, so that the material cutting mechanism can correspond to the transmission channel located between the feeding mechanism and the hot end, realizing the cutting of the consumable material upstream of the hot end, which can completely avoid the phenomenon of adhesion and incomplete cutting when cutting the consumable material due to the thermal expansion of the consumable material in the hot end, thereby improving the cleanliness of the cutting tool surface and reducing the occurrence of blockage caused by the unevenness of the cut-off part of the consumable material resulting in subsequent feeding obstruction. Description of the Drawings

[0022] Figure 1 Stereoscopic schematic diagram of the material cutting mechanism provided by an embodiment of the present application.

[0023] Figure 2 Stereoscopic exploded schematic diagram of the material cutting mechanism provided by an embodiment of the present application.

[0024] Figure 3 Schematic diagram of the working state of the material cutting mechanism provided by an embodiment of the present application.

[0025] Figure 4 Schematic diagram of the structure of the material cutting mechanism provided by another embodiment of the present application.

[0026] Figure 5 Schematic diagram of the structure of the nozzle assembly provided by an embodiment of the present application.

[0027] Figure 6 Stereoscopic schematic diagram of the 3D printing device provided by an embodiment of the present application.

[0028] Description of the Main Element Symbols

[0029] Material cutting mechanism 10

[0030] Carrier 11

[0031] First surface 111

[0032] Second surface 112

[0033] Receiving hole 113

[0034] Guide groove 114

[0035] Convex column 115

[0036] Pushing member 12

[0037] Pushing portion 121

[0038] Reset portion 122

[0039] Positioning post 123

[0040] Connecting post 124

[0041] Second shearing member 13

[0042] First end 131

[0043] Second end 132

[0044] Second cutting edge 133

[0045] First shearing member 14

[0046] Third end 141

[0047] Fourth end 142

[0048] First cutting edge 143

[0049] Reset member 15

[0050] Nozzle assembly 1

[0051] Feeding mechanism 17

[0052] Feeding driving member 171

[0053] Hot end 18

[0054] Heat dissipation part 181

[0055] Heating part 182

[0056] Nozzle part 183

[0057] Transfer channel 19

[0058] 3D printing device 2

[0059] Forming platform 21

[0060] Driving assembly 22

[0061] First direction X

[0062] Second direction Y

[0063] The following specific embodiments will further illustrate the present application in combination with the above-mentioned drawings. Specific embodiments

[0064] The following description will describe the content of the present application more comprehensively with reference to the accompanying drawings. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terms used herein are for the purpose of describing particular exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Further, when used herein, "comprises" and / or "comprising" and / or "has", integers, steps, operations, components and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Further, terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the content of this application, and should not be interpreted in an idealized or overly formal sense.

[0065] Generally, since the consumables for FDM are generally thermoplastic materials such as wax, ABS (acrylonitrile-butadiene-styrene copolymer), nylon, etc., the consumables are heated and melted in the nozzle, and the nozzle moves along the part cross-section contour and filling trajectory, while extruding the melted material. The consumables quickly solidify and coagulate with the surrounding materials to complete the printing of the model. However, when an FDM-type 3D printer needs to print in different colors or replace the consumables, since the consumables near the heating block or nozzle are easily deformed due to melting, it is easy to cause the consumables in the feed channel to adhere to the inner wall of the feed channel during retraction, resulting in blockage of the feed channel, and further causing the printing to be interrupted or the printing to fail. How to solve the above problems, improve the efficiency of consumable cutting, improve the quality of retracted consumables, and improve the success rate of the next feeding is what those skilled in the art need to consider.

[0066] Correspondingly, the embodiment of the present application provides a material cutting mechanism and a nozzle assembly and a 3D printing device applying the same. The material cutting mechanism is used for shearing the consumables passing through the transmission channel, and the material cutting mechanism includes: a carrier member, the transmission channel penetrating through the carrier member; a first cutting member rotatably connected to the carrier member; a second cutting member rotatably connected to the first cutting member, the first cutting member and the second cutting member being arranged on the same side of the carrier member; and a pushing member rotatably connected to the second cutting member for driving the second cutting member to invade the transmission channel.

[0067] Furthermore, in the material cutting mechanism of the present application, the first cutting member and the second cutting member are disposed on the same side of the carrier member, and can cooperate with each other to penetrate the transmission channel passing through the carrier member; if there is a consumable in the transmission channel, the consumable can be cut. By driving the pushing member, the pushing member can drive the second cutting member to cut the consumable. In this process, the second cutting member can rotate relative to the pushing member and the first cutting member, and the second cutting member cuts the consumable in a sliding-like manner. The cutting edge of the cut consumable corresponds to a small length, reducing the fatigue of the fixed cutting edge, dispersing the force, and making the cutting edge not easily damaged. The nozzle assembly and the 3D printing device using the same have a feeding mechanism and a hot end to continuously heat and extrude the consumable to achieve printing. The transmission channel passes through the feeding mechanism and the hot end to ensure the continuity of the consumable feeding. The material cutting mechanism is located between the feeding mechanism and the hot end, so that the material cutting mechanism can correspond to the transmission channel between the feeding mechanism and the hot end to cut the consumable upstream of the hot end, completely avoiding the phenomenon of adhesion and incomplete cutting when cutting the consumable due to the thermal expansion of the consumable in the hot end, thereby improving the cleanliness of the cutting tool surface and reducing the occurrence of blockage due to unsmooth feeding of the subsequent consumable at the cut-off position of the consumable.

[0068] Those skilled in the art can understand that "3D printing" refers to a technology that constructs an object by layer-by-layer printing based on a digital model file, using powdery metals, plastics, or other bondable materials.

[0069] The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0070] Referring to the accompanying drawings below, the specific embodiments of the present application will be further described in detail.

[0071] As Figures 1 to 4 shown, an embodiment of the present application provides a material cutting mechanism 10, and the material cutting mechanism 10 is used to cut the consumable passing through the transmission channel 19. The transmission channel 19 is used to transmit the consumable, or the transmission channel 19 is defined as a preset movement path of the consumable during transmission.

[0072] In one embodiment, the material cutting mechanism 10 includes a carrier member 11, a first cutting member 14, a second cutting member 13, and a pushing member 12. Among them, the transmission channel 19 passes through the carrier member 11; the first cutting member 14 is rotatably connected to the carrier member 11; the second cutting member 13 is rotatably connected to the first cutting member 14, and the first cutting member 14 and the second cutting member 13 are disposed on the same side of the carrier member 11; the pushing member 12 is rotatably connected to the second cutting member 13 and is used to drive the second cutting member 13 to penetrate the transmission channel 19.

[0073] It can be understood that for the blanking mechanism 10 of the present application, the first shearing member 14 and the second shearing member 13 are arranged on the same side of the carrier member 11, and they can cooperate with each other to penetrate the transmission channel 19 passing through the carrier member 11; if there is a consumable (not shown in the figure) in the transmission channel 19, the consumable can be cut. By driving the pusher member 12, the pusher member 12 can drive the second shearing member 13 to shear the consumable. During this process, the second shearing member 13 can rotate relative to the pusher member 12 and the first shearing member 14, and the second shearing member 13 shears the consumable in a sliding manner. The cutting edge of the cut consumable corresponds to a small length, reducing the fatigue of the fixed cutting edge, dispersing the force, and making the cutting edge not easily damaged.

[0074] In one embodiment, the carrier member 11 includes a first surface 111 and a second surface 112 that are adjacent and joined. The transmission channel 19 penetrates the first surface 111, and both the first shearing member 14 and the second shearing member 13 are located on one side of the first surface 111. The part of the pusher member 12 for connecting with the second shearing member 13 is located on one side of the first surface 111, and the part of the pusher member 12 for connecting with the carrier member 11 is located on one side of the second surface 112.

[0075] In one embodiment, the pusher member 12 includes a propulsion portion 121 and a reset portion 122. The propulsion portion 121 is rotatably connected to the second shearing member 13, the reset portion 122 is connected to the propulsion portion 121, and the propulsion portion 121 is connected to the carrier member 11 through a reset member 15. The propulsion portion 121 is arranged corresponding to the side where the first surface 111 is located, and the reset portion 122 is arranged corresponding to the side where the second surface 112 is located.

[0076] In this embodiment, the propulsion portion 121 and the reset portion 122 are integrally formed, and the reset portion 122 is located on the side of the propulsion portion 121 away from the first shearing member 14 and the second shearing member 13. The pusher member 12 is generally arranged in an "L" shape, and the propulsion portion 121 and the reset portion 122 form an approximately perpendicular angle to respectively correspond to the first surface 111 and the second surface 112.

[0077] In one embodiment, the carrier member 11 is formed with a receiving hole 113, and the receiving hole 113 is recessed from the second surface 112. The reset portion 122 protrudes toward the second surface 112 to form a positioning post 123. One end of the reset member 15 is received in the receiving hole 113, and the other end of the reset member 15 is sleeved outside the positioning post 123.

[0078] It can be understood that the reset member 15 is used to push the pushing member 12 to automatically return to its original position. In this embodiment, taking the reset member 15 as an elastic reset structure as an example for display, it can be a spring, a torsion spring, an elastic rubber rod, or other parts with elastic deformation and reset ability. One end of the reset member 15 is received in the receiving hole 113 for positioning, and the other end is sleeved outside the positioning post 123 for positioning. During the process of the pushing member 12 pushing the first shearing member 14 and the second shearing member 13, the reset portion 122 approaches or moves away from the side surface, and cooperates with the reset member 15 to achieve reset. In other embodiments, the reset member 15 can also be other structures that can achieve the reset function, such as a magnetic reset structure.

[0079] In one embodiment, the pushing portion 121 protrudes toward the first surface 111 to form a connecting post 124. One end of the second shearing member 13 is rotatably connected to the pushing portion 121 through the connecting post 124. The bearing member 11 is formed with a guiding groove 114, and the guiding groove 114 is recessed from the first surface 111. The connecting post 124 extends into the guiding groove 114.

[0080] It can be understood that one end of the second shearing member 13 is sleeved around the connecting post 124, so that the second shearing member 13 can rotate relative to the pushing portion 121. The end of the connecting post 124 away from the second shearing member 13 and the pushing portion 121 extends into the guiding groove 114, and the inner wall of the guiding groove 114 guides and positions the connecting post 124. The guiding groove 114 is generally arranged to extend along a straight line direction, and the pushing portion 121 can also be arranged to extend in the same direction.

[0081] In one embodiment, the second shearing member 13 includes a spaced first end portion 131 and a second end portion 132. The first end portion 131 is rotatably connected to the first shearing member 14, and the second end portion 132 is rotatably connected to the pushing member 12. The second shearing member 13 further includes a second cutting edge 133, and the second cutting edge 133 is located between the first end portion 131 and the second end portion 132. The second cutting edge 133 is configured to face the transmission channel 19.

[0082] In one embodiment, the first shearing member 14 includes a spaced third end portion 141 and a fourth end portion 142. The third end portion 141 is connected to the first end portion 131, and the fourth end portion 142 is rotatably connected to the bearing member 11. The fourth end portion 142 is arranged on the side of the third end portion 141 away from the second end portion 132, and the first shearing member 14 is located on the side of the second shearing member 13 away from the pushing member 12.

[0083] It can be understood that the first shearing member 14, the second shearing member 13 and the pushing member 12 are driven and connected in a link manner. Both the first shearing member 14 and the second shearing member 13 are substantially sheet-shaped. The fourth end portion 142 is rotatably connected to the carrier 11 through a stud 115 protruding from the first surface 111. The third end portion 141 of the first shearing member 14 and the first end portion 131 of the second shearing member 13 are rotatably connected through a bolt or a rotating shaft (not shown in the figure). The first end portion 131 and the third end portion 141 are stacked and partially overlapped. The first shearing member 14 and the second shearing member 13 can rotate around the bolt or the rotating shaft (not shown in the figure) connecting the first end portion 131 and the third end portion 141, so that the second end portion 132 and the fourth end portion 142 approach or move away from each other.

[0084] In one embodiment, further in combination with Figure 3 As shown, the fourth end portion 142 and the second end portion 132 are spaced on opposite sides of the conveying channel 19 along a first direction X. The carrier 11 moves along the first direction X to push the second shearing member 13. The first end portion 131 and the second end portion 132 are spaced on opposite sides of the conveying channel 19 along a second direction Y. The third end portion 141 and the fourth end portion 142 are spaced on opposite sides of the conveying channel 19 along the second direction Y. The first direction X is perpendicular to the second direction Y.

[0085] It can be understood that the pushing member 12 is driven to move toward the side where the conveying channel 19 is located along the first direction X, and further drives the second end portion 132 to move toward the side where the conveying channel 19 is located along the first direction X. The fourth end portion 142 is rotatably connected to the carrier 11, and the first end portion 131 is rotatably connected to the third end portion 141. The first shearing member 14 and the second shearing member 13 cooperate to guide the movement of the second shearing member 13, so that the whole of the second shearing member 13 approaches the conveying channel 19. The second cutting edge 133 of the second shearing member 13 penetrates into the conveying channel 19 and performs sliding cutting, and the consumable is cut off. Subsequently, the external force applied to the pushing member 12 is removed, and the pushing member 12 is reset under the drive of the reset member 15, and further drives the first shearing member 14 and the second shearing member 13 to reset.

[0086] In one embodiment, further in combination with Figure 4As shown, the fourth end portion 142 and the second end portion 132 are disposed on opposite sides of the conveying channel 19 at an interval in a first direction X. The carrier 11 moves in the first direction X to push the second shearing member 13. The third end portion 141 and the fourth end portion 142 are disposed on the same side of the conveying channel 19 in a second direction Y. The first direction X is perpendicular to the second direction Y. The first shearing member 14 further includes a first cutting edge 143, and the first cutting edge 143 is located between the third end portion 141 and the fourth end portion 142. The first cutting edge 143 is configured to face the conveying channel 19. The first cutting edge 143 and the second cutting edge 133 face each other, and the first cutting edge 143 and the second cutting edge 133 cooperate with each other to shear the consumable material.

[0087] It can be understood that the pushing member 12 is driven to move in the first direction X toward the side where the conveying channel 19 is located, and further drives the second end portion 132 to move in the first direction X toward the side where the conveying channel 19 is located. The fourth end portion 142 is rotatably connected to the carrier 11, the first end portion 131 is rotatably connected to the third end portion 141, and the first shearing member 14 cooperates with the second shearing member 13 to guide the movement of the second shearing member 13, so that the second shearing member 13 as a whole approaches the conveying channel 19. At the same time, the first shearing member 14 also approaches the conveying channel 19 under the action of the connecting rod. When the second cutting edge 133 contacts the consumable material, the second end portion 132 continues to move in the first direction X, and the first end portion 131 moves downward in the second direction Y and drives the first cutting edge 143 to also contact the consumable material through the third end portion 141. The first cutting edge 143 and the second cutting edge 133 cooperate to realize the shearing of the consumable material. Subsequently, the external force applied to the pushing member 12 is removed, and the pushing member 12 is reset under the drive of the reset member 15, and further drives the first shearing member 14 and the second shearing member 13 to reset.

[0088] In this embodiment, the length of the second shearing member 13 can be made shorter than the length of the first shearing member 14, or the guiding groove 114 can be extended in the first direction X to exceed the corresponding position of the conveying channel 19.

[0089] Further in combination with Figure 5 As shown, an embodiment of the present application further provides a nozzle assembly 1. The nozzle assembly 1 has a conveying channel 19 for conveying a consumable material. The nozzle assembly 1 further includes a feeding mechanism 17, a hot end 18, and a material breaking mechanism 10. The conveying channel 19 passes through the feeding mechanism 17, and the feeding mechanism 17 is used for conveying the consumable material; the conveying channel 19 passes through the hot end 18, and the hot end 18 is used for heating the consumable material; the feeding mechanism 17 and the hot end 18 are respectively connected to the carrier 11.

[0090] In one embodiment, the transmission channel 19 is arranged through the feeding mechanism 17, and the feeding mechanism 17 is used to transfer consumables. The transmission channel 19 is arranged through the hot end 18, and the hot end 18 is used to heat the consumables. The first shearing member 14 and the second shearing member 13 are enabled to swing relative to the transmission channel 19 to cut off the consumables.

[0091] In one embodiment, the feeding structure at least includes a feeding driving member 171 and an extrusion gear (not shown in the figure). The feeding driving member 171 is drivingly connected to the extrusion gear. The transmission channel 19 passes through the extrusion gear, and the extrusion gear clamps the consumables and sends them to the hot end 18. It can be understood that the structure of the feeding driving member 171 and a pair of extrusion gears can be known and feasible structures, such as the cooperation of a driving motor, a driving wheel and a driven wheel, etc., which will not be elaborated here.

[0092] In one embodiment, the hot end 18 at least includes a heat dissipation part 181, a heating part 182 and a nozzle part 183. The heat dissipation part 181 and the heating part 182 are respectively connected to the nozzle part 183. The heating part 182 can heat the nozzle part 183 to melt the consumables located therebetween. The heat dissipation part 181 is thermally coupled to the nozzle part 183 and / or the heating part 182 to achieve heat dissipation of the hot end 18. It can be understood that the structures of the heat dissipation part 181, the heating part 182 and the nozzle part 183 can be known and feasible structures, which will not be elaborated here.

[0093] Further in combination with Figure 6 As shown, the embodiment of the present application further provides a 3D printing device 2, which includes a forming platform 21, a driving component 22 and a nozzle component 1 as described in the foregoing embodiment. The driving component 22 drives the nozzle component 1 to move relative to the forming platform 21.

[0094] It can be understood that the nozzle component 1 and the 3D printing device 2 applying it have a feeding mechanism 17 and a hot end 18 to enable continuous heating and extrusion of the consumables to achieve printing. The transmission channel 19 runs through the feeding mechanism 17 and the hot end 18 to ensure the continuity of the consumable feeding. The material cutting mechanism 10 is located between the feeding mechanism 17 and the hot end 18, so that the material cutting mechanism 10 can correspond to the transmission channel 19 between the feeding mechanism 17 and the hot end 18 to realize the cutting of the consumables upstream of the hot end 18, which can completely avoid the phenomenon of adhesion and incomplete cutting when cutting the consumables due to the thermal expansion of the consumables in the hot end 18, thereby improving the surface cleanliness of the cutting knife and reducing the occurrence of the phenomenon of blocked feeding caused by the unevenness of the cut-off part of the consumables.

[0095] In the foregoing, specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. A material cutting mechanism, characterized in that: The material cutting mechanism is used to shear the consumables passing through the transmission channel, and the material cutting mechanism includes: A carrier, wherein the transmission channel passes through the carrier; A first shearing member, which is rotatably connected to the bearing member; a second shearing member, which is rotatably connected to the first shearing member, and the first shearing member and the second shearing member are arranged on the same side of the bearing member; A pushing member is rotatably connected to the second shearing member and is used to drive the second shearing member to invade the transmission channel.

2. The material cutting mechanism according to claim 1, characterized in that: The carrier includes a first surface and a second surface that are adjacent and intersecting, the transmission channel passes through the first surface, the first shearing member and the second shearing member are both located on one side of the first surface, the pushing member includes a propulsion portion and a reset portion, the propulsion portion is rotatably connected to the second shearing member, the reset portion is connected to the propulsion portion, the propulsion portion is connected to the carrier through a reset portion, the propulsion portion is arranged corresponding to the side where the first surface is located, and the reset portion is arranged corresponding to the side where the second surface is located.

3. The material cutting mechanism according to claim 2, characterized in that: The carrier is formed with a receiving hole, which is recessed from the second surface. The reset portion is protruded toward the second surface to form a positioning column. One end of the reset member is received in the receiving hole, and the other end of the reset member is sleeved on the outside of the positioning column.

4. The material cutting mechanism according to claim 2, characterized in that: The propulsion portion is protruded toward the first surface to form a connecting column, one end of the second shearing member is rotatably connected to the propulsion portion through the connecting column, the support member is formed with a guide groove, the guide groove is recessed from the first surface, and the connecting column extends into the guide groove.

5. The material cutting mechanism according to claim 1, characterized in that: The second shearing piece includes a first end and a second end spaced apart, the first end being rotatably connected to the first shearing piece, and the second end being rotatably connected to the pushing piece, the second shearing piece also includes a second cutting edge, the second cutting edge being located between the first end and the second end, and the second cutting edge being configured to be disposed toward the transmission channel.

6. The material cutting mechanism according to claim 5, characterized in that: The first shearing member includes a third end and a fourth end spaced apart, the third end being connected to the first end, the fourth end being rotatably connected to the supporting member, the fourth end being disposed on a side of the third end away from the second end, and the first shearing member being located on a side of the second shearing member away from the pushing member.

7. The material cutting mechanism according to claim 6, characterized in that: The fourth end portion and the second end portion are spaced apart on opposite sides of the transmission channel along a first direction, the supporting member moves along the first direction to push the second shearing member, the first end portion and the second end portion are spaced apart on opposite sides of the transmission channel along a second direction, the third end portion and the fourth end portion are spaced apart on opposite sides of the transmission channel along the second direction, and the first direction is perpendicular to the second direction.

8. The material cutting mechanism according to claim 6, characterized in that: The fourth end portion and the second end portion are spaced apart on opposite sides of the transmission channel along a first direction, the supporting member moves along the first direction to push the second shearing member, the third end portion and the fourth end portion are arranged on the same side of the transmission channel along a second direction, the first direction is perpendicular to the second direction, the first shearing member also includes a first cutting edge, the first cutting edge is located between the third end portion and the fourth end portion, the first cutting edge is constructed to be arranged toward the transmission channel, the first cutting edge and the second cutting edge are arranged toward each other, and the first cutting edge and the second cutting edge cooperate with each other to cut consumables.

9. A nozzle assembly, characterized in that: The nozzle assembly has a transmission channel, and the transmission channel is used to transmit consumables. The nozzle assembly also includes: A feeding mechanism, wherein the transmission channel is arranged through the feeding mechanism, and the feeding mechanism is used to transfer the consumables; a hot end, the transmission channel is disposed through the hot end, and the hot end is used to heat the consumable material; and According to any one of claims 1 to 8, the feeding mechanism and the hot end are respectively connected to the supporting member.

10. A 3D printing device, characterized in that: It comprises a molding platform, a driving assembly and the nozzle assembly as claimed in claim 9, wherein the driving assembly drives the nozzle assembly to move relative to the molding platform.

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