Material feeding assembly, hopper, 3D printing feeding device and 3D printing system

Abstract

A material guiding assembly, a hopper, a 3D printing feeding device, and a 3D printing system are disclosed. The material guiding assembly includes a guiding component and a reinforcing component, with the reinforcing component mounted on the guiding component. The guiding component and the reinforcing component form a feeding channel, which includes an inlet and an outlet. The hardness of the reinforcing component is greater than that of the guiding component. Therefore, the wear resistance of the reinforcing component is better than that of the guiding component, which can effectively improve the reliability of the material guiding assembly and reduce the wear of the filament.

Description

[0001] This application is a divisional application. The original application has the application number 2024221413785 and the original application date is August 31, 2024. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of 3D printing technology, and in particular to a material guiding component, a hopper, a 3D printing material feeding device, and a 3D printing system. Background Technology

[0003] 3D printing technology is a technique that uses digital model files as a basis and employs powdered metal or plastic and other bondable materials to construct objects layer by layer. Also known as additive manufacturing, it is typically achieved using a 3D printer system. In a 3D printing system, filament is fed into the printer through a feed inlet. The filament is under tension as it passes through the feed inlet, and it continuously wears down against the inlet during transport, causing damage to the filament. Utility Model Content

[0004] This application provides a material guiding component, a hopper, a 3D printing feeding device, and a 3D printing system for reducing filament wear.

[0005] In a first aspect, this application provides a material guiding assembly, which includes a material guiding component and a reinforcing component. The reinforcing component is installed on the material guiding component, and the material guiding component and the reinforcing component form a feeding channel. The feeding channel includes an inlet and an outlet, and the hardness of the reinforcing component is greater than the hardness of the material guiding component.

[0006] In one feasible implementation, the material guiding assembly further includes an active feeding wheel, and the feeding channel includes a flared hole section and a material guiding channel section, wherein the flared hole section is disposed near the feed inlet, the material guiding channel section is disposed near the active feeding wheel, and the reinforcing member covers part of the flared hole section and part of the material guiding channel section, or the reinforcing member covers a portion of the flared hole section near the material guiding channel section.

[0007] In one feasible implementation, the inner wall surface of the guide member is formed with a mounting groove for mounting the reinforcing member. Along the axial direction of the feeding channel, the inner wall surface of the flared hole section gradually narrows from the feed inlet to the active feed wheel. The reinforcing member at least covers one end of the inner wall surface of the flared hole section near the guide channel section.

[0008] In one feasible implementation, the reinforcing member is generally hollow cylindrical, and the mounting groove has at least three groove wall surfaces along the radial direction of the reinforcing member; the mounting groove has a connecting port that connects to the outside of the guide member, the connecting port being used for the reinforcing member to be inserted into the mounting groove, and the outer peripheral surface of the reinforcing member is in close contact with at least two oppositely arranged groove wall surfaces.

[0009] In one feasible implementation, the groove wall surface is further formed with a notch, and the outer peripheral surface of the reinforcing member is in close contact with the groove wall surface where the notch is located and the groove wall surface opposite to the notch; the notch communicates with the mounting groove, and the axial direction of the notch is staggered with the axial direction of the communication port, and the notch at least accommodates a portion of the outer peripheral surface of the reinforcing member.

[0010] In one feasible implementation, a protrusion is formed on the groove wall surface where the notch is located, and / or on the groove wall surface opposite to the notch, and the protrusion covers a portion of the groove wall surface between the notch and the communication opening along the insertion direction of the reinforcement.

[0011] In one feasible implementation, the inner wall surface of the reinforcing member is formed into a trumpet-shaped hole in the direction from the feed port to the active feed wheel. The inner wall surface of the reinforcing member is in contact with the inner wall surface of the trumpet-shaped hole section. At least a portion of the inner wall surface of the reinforcing member forms a cylindrical hole. The ratio of the diameter of the cylindrical hole to the diameter of the guide channel section on the guide member is greater than or equal to 0.95 and less than or equal to 1.05.

[0012] In one feasible implementation, the inner wall surface of the reinforcing member is formed into a funnel-shaped hole in the direction from the feed inlet to the active feed wheel. The inner wall surface of the reinforcing member is in contact with the inner wall surface of the funnel-shaped hole section. At least a portion of the inner wall surface of the reinforcing member forms a cylindrical hole. The ratio of the diameter of the cylindrical hole to the diameter of the guide channel section on the guide member is greater than or equal to 0.9 and less than 1.0.

[0013] In one feasible implementation, the inner wall surface of the reinforcing member includes a main arc surface, which is connected to the inner wall surface of the flared hole section; along the axial direction of the feeding channel away from the feed inlet, the diameter of the main arc surface gradually decreases until it is equal to the diameter of the cylindrical hole.

[0014] In one feasible implementation, the guide member is formed with a first step, the first step including a connected first circumferential surface and a first plane, the first circumferential surface extending along the axial direction of the feeding channel, the first plane being perpendicular to the axial direction of the feeding channel, and the first plane being in contact with the top surface of the reinforcing member.

[0015] And / or, the guide member further forms a second step, the second step being further away from the feed inlet relative to the first step, the second step including a connected second circumferential surface and a second plane, the second circumferential surface extending along the axial direction of the feeding channel, the second plane being perpendicular to the axial direction of the feeding channel, and the second plane being in contact with the bottom surface of the reinforcing member.

[0016] In one feasible implementation, the inner wall surface of the guide member includes a third circumferential surface, which extends axially along the feeding channel and connects between the first plane and the second plane. The third circumferential surface is the inner wall surface of the mounting groove of the guide member. The third circumferential surface abuts against at least a portion of the outer wall surface of the reinforcing member. The top surface and bottom surface of the reinforcing member are interference-fitted with the guide member.

[0017] In one feasible implementation, the inner wall surface of the reinforcing member includes an upper arc surface and a lower arc surface. The upper arc surface is connected to the top surface of the reinforcing member at the edge of the feeding channel near the feed inlet in the axial direction, and the lower arc surface is connected to the bottom surface of the reinforcing member at the edge of the feeding channel away from the feed inlet in the axial direction.

[0018] The diameter of the upper arc surface at the edge of the feeding channel away from the feed inlet in the axial direction is smaller than the diameter of the first circumferential surface; and / or, the diameter of the lower arc surface at the edge of the feeding channel near the feed inlet in the axial direction is smaller than the diameter of the second circumferential surface; along the axial direction of the feeding channel, as the distance between the lower arc surface and the feed inlet decreases, the diameter of the lower arc surface gradually decreases until it is equal to the diameter of the cylindrical hole.

[0019] In one feasible implementation, the diameter of the cylindrical hole is greater than or equal to 1.9 mm and less than or equal to 2.6 mm; along the axial direction of the inner wall surface of the reinforcing member, the length of the cylindrical hole is greater than or equal to 0.2 mm and less than or equal to 1.6 mm.

[0020] In one feasible implementation, the diameter of the first circumferential surface is greater than the diameter of the second circumferential surface; the diameter of the first circumferential surface is greater than or equal to 4.88 mm and less than or equal to 7.32 mm; the diameter of the second circumferential surface is greater than or equal to 2.0 mm and less than or equal to 3.0 mm.

[0021] In one feasible implementation, at least a portion of the active feed wheel protrudes from the inner wall of the guide member, and the active feed wheel is used to drive the wire material to be conveyed to the discharge port.

[0022] In one feasible implementation, at least a portion of the inner wall surface of the reinforcing member forms a cylindrical hole, or the inner wall surface of the reinforcing member has a minimum diameter position; along the axial direction of the feeding channel, the distance between the center of the active feeding wheel and the edge of the cylindrical hole away from the feed inlet is greater than or equal to 7.0 mm and less than or equal to 11.02 mm, or, along the axial direction of the feeding channel, the distance between the center of the active feeding wheel and the minimum diameter position of the inner wall surface of the reinforcing member is greater than or equal to 7.0 mm and less than or equal to 15 mm.

[0023] In one feasible implementation, the material guiding assembly further has a transparent outer cover, the material guiding assembly is disposed inside the outer cover, and an indicator is also provided inside the outer cover. The indicator is disposed opposite to the material tray, and the indicator and the material tray are disposed on opposite sides of the radial direction of the feed inlet. The indicator has a lamp bead and a ring-shaped or surface-shaped light guide, and the main light-emitting surface of the light guide faces the axial direction of the feed inlet.

[0024] In one feasible implementation, the material guiding assembly has a mounting portion with a mounting plane facing the feed inlet. The material guiding element and the indicator element are mounted on the mounting plane. The projection distance of the line connecting the center of the light guiding portion and the center of the feed inlet on the mounting plane is greater than or equal to 20 mm and less than or equal to 60 mm.

[0025] In one feasible implementation, the reinforcing member is a ceramic component, and the material guide is a plastic component.

[0026] Secondly, this application provides a hopper for a 3D printing feeding device, the hopper including a housing and a material guiding component as described in the first aspect, the material guiding component being installed in the housing.

[0027] Thirdly, this application provides a 3D printing feeding device for use in a 3D printing system. The 3D printing feeding device includes a material tray and a hopper as described in the second aspect. The material tray is installed in the hopper and is used to carry filament.

[0028] Fourthly, this application also provides a 3D printing system comprising a 3D printer and a 3D printing feed device as described in the third aspect, the 3D printing feed device providing filament to the 3D printer.

[0029] In this solution, the wear resistance of the reinforcing component is better than that of the guide component, which can effectively improve the reliability of the guide assembly and reduce the wear of the wire. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0031] Figure 1 A cross-sectional view of a silo provided in one embodiment of this application;

[0032] Figure 2 An exploded view of a connecting element provided in an embodiment of this application;

[0033] Figure 3 A cross-sectional view of a guide member provided in an embodiment of this application;

[0034] Figure 4 A front view of a silo provided in an embodiment of this application;

[0035] Figure 5 A three-dimensional structural schematic diagram of a guide member provided in an embodiment of this application;

[0036] Figure 6 A top view of a silo provided in an embodiment of this application;

[0037] Figure 7 This is a three-dimensional structural diagram of a box provided in one embodiment of the present application;

[0038] Figure 8 A cross-sectional view of a base provided in one embodiment of this application;

[0039] Figure 9 A top view of a base provided in one embodiment of this application;

[0040] Figure 10 A bottom view of a base provided in one embodiment of this application;

[0041] Figure 11 This is a three-dimensional structural diagram of a base provided in an embodiment of this application;

[0042] Figure 12 This is a schematic diagram of a flexible release plate connected to multiple feed release rings according to an embodiment of this application;

[0043] Figure 13 This is a three-dimensional structural diagram of a material guiding component connected to a base according to an embodiment of this application;

[0044] Figure 14 A three-dimensional structural schematic diagram of a material guiding assembly provided in an embodiment of this application;

[0045] Figure 15 A cross-sectional view of a material guiding assembly provided in an embodiment of this application;

[0046] Figure 16 A cross-sectional view of another material guiding assembly provided in an embodiment of this application;

[0047] Figure 17 This is an assembly diagram of the guide and reinforcing member provided in one embodiment of this application;

[0048] Figure 18 A cross-sectional view of an active feeding wheel of a material guiding assembly provided in one embodiment of this application;

[0049] Figure 19 for Figure 18 Enlarged view of point A in the middle;

[0050] Figure 20 This is a schematic diagram of the structure of the indicator in a material guiding assembly provided in an embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1000, hopper; 100, housing; 100a, inner cavity; 101, bottom plate; 102, side plate; 103, base; 104, groove; 105, hole; 106, wire trough; 107, heating chamber; 108, heater; 109, guide; 110, guide part; 111, sealing part; 112, sealing tube; 113, sealing ring; 114, first sealing tooth; 115, second sealing tooth; 116, boss; 117, first limiting edge; 18. First slot; 119. Second limiting edge; 120. Second slot; 123. Elastic element; 123a. Limiting flange; 123b. Settlement groove; 124. Box cover; 125. Hot flow outlet; 127. Fan; 128. Recessed area; 129. Drying chamber; 200. Connecting element; 201a. Feeding channel; 201b. Discharge channel; 202a. Feeding release ring; 202b. Discharge release ring; 203. Flexible release plate; 204. Active friction 205. Friction wheel; 208. Driven friction wheel; 209. Linkage structure; 210. Return spring; 211. Rotating shaft; 212. Hall sensor; 213. Button; 300. Material guide assembly; 301. Material guide component; 302. Reinforcing component; 303. Feeding channel; 304. Inlet; 305. Outlet; 306. Mounting slot; 307. First step; 308. Second step; 309. First circumferential surface; 310. First plane; 311. Second circumferential surface; 31 2. Second plane; 313. Upper arc surface; 314. Lower arc surface; 315. Main arc surface; 316. Cylindrical hole; 317a. Horn-shaped hole section; 317b. Material guide channel section; 318. Third circumferential surface; 319. Active feed wheel; 320. Driven feed wheel; 321. Connecting port; 322. Notch; 323. Protrusion; 324. Outer cover; 325. Indicator; 326. Light guide part; 327. Mounting part; 328. Mounting plane. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0054] This application provides a 3D printing system, which includes a 3D printer and a 3D printing feed device. The 3D printing feed device is connected to the 3D printer and is used to supply filament for printing to the 3D printer.

[0055] The 3D printing feeding device includes a filament tray and a hopper. The filament tray is installed inside the hopper and is used to hold the filament. Specifically, the filament is wound around the filament tray. The filament tray can rotate. When the filament drags the filament tray forward, the tray releases the filament, and the 3D printing feeding device can supply filament to the 3D printer. When the filament tray reverses direction, it can retract the released filament.

[0056] The 3D printing feed device also includes a rotating roller, which is located inside the housing and on the outer periphery of the filament tray. When the 3D printing feed device needs to recycle filament, the rotating roller drives the filament tray to rotate, with the connecting element at least partially located below the rotating roller. The rotating roller can drive the filament tray to rotate to achieve filament winding.

[0057] Please see Figure 1 The hopper 1000 includes a housing 100, a connecting member 200, and a guide member 109. The housing 100 has an inner cavity 100a. The connecting member 200 is disposed in the inner cavity 100a.

[0058] Please see Figure 2 The connecting member 200 has a discharge channel 201b and at least one inlet channel 201a. In some embodiments, the number of inlet channels 201a is two or more, and each inlet channel 201a is connected to the discharge channel 201b.

[0059] The connecting member 200 also includes an outlet release ring 202b and at least one inlet release ring 202a. One end of the outlet release ring 202b extends into the outlet channel 201b, and the other end extends out of the outlet channel 201b. One end of an extension guide tube is inserted into the outlet channel 201b, and the other end extends out of the outlet channel 201b, and the extension guide tube is located inside the outlet release ring 202b. In some embodiments, the extension guide tube extends outside the housing 100, and the portion of the extension guide tube extending outside the housing 100 can be connected to the 3D printer. The extension guide tube can receive filament and guide the filament, and the extension guide tube delivers the filament to the 3D printer.

[0060] The discharge release ring 202b is used to lock or release the protruding guide tube extending from the discharge release ring 202b to the outside of the housing 100. When the discharge release ring 202b releases the protruding guide tube, the user can pull the protruding guide tube out of the housing 100 for easy transportation, disassembly of the material bin, or convenient handling of broken filament in the protruding guide tube. When locking the protruding guide tube, the discharge release ring 202b can limit the protruding guide tube, so that the protruding guide tube can more stably feed filament to the 3D printer.

[0061] The number of feed release rings 202a is the same as the number of feed channels 201a. Each feed release ring 202a extends into its corresponding feed channel 201a. Each feed release ring 202a has a built-in guide tube, which is used to convey the wire material to the extended guide tube. The feed release ring 202a is used to lock or release the built-in guide tube. When locking the built-in guide tube, the feed release ring 202a limits the movement of the built-in guide tube, improving the stability of the wire material conveying through the built-in guide tube. When releasing the built-in guide tube, the feed release ring 202a allows the user to easily pull out the built-in guide tube, thus facilitating the handling of broken wire material within the built-in guide tube.

[0062] See also Figure 1 and Figure 2 The guide member 109 extends from the outside of the housing 100 into the inner cavity 100a. The guide member 109 is movably connected to the housing 100 to press against the discharge release ring 202b. It should be noted that the guide member 109 can move approximately along its axial direction. The guide member 109 and the discharge release ring 202b are spaced apart, and the guide member 109 can also press against the discharge release ring 202b. When the guide member 109 and the discharge release ring 202b are spaced apart, the discharge release ring 202b locks the extended guide tube. When the guide member 109 presses against the discharge release ring 202b, the guide member 109 causes the discharge release ring 202b to switch from a locked state to a released state. At this time, the user can operate from outside the housing 100 to pull the extended guide tube out of the discharge release ring 202b and out of the housing 100, thus facilitating the transportation and disassembly of the hopper, or conveniently cleaning up broken wire in the extended guide tube.

[0063] Please see Figure 3 The guide member 109 includes a guide portion 110 and a sealing portion 111 connected together. The guide portion 110 extends from the inner cavity 100a and passes through to the outside of the housing 100. The guide portion 110 is used to movably abut against the discharge release ring 202b. The sealing portion 111 is connected to the housing 100. The movable abutment can be either a direct abutment between the guide portion 110 and the discharge release ring 202b or an indirect force transmission abutment.

[0064] In the embodiments provided in this application, the guide portion 110 can be a rigid tubular structure, through which the protruding guide tube passes. The protruding guide tube extends from the discharge release ring 202b, and the guide portion 110 can partially extend outside the housing 100 or be disposed near the housing 100.

[0065] The sealing part 111 extends at least partially into the guide part 110. The sealing part 111 is used for the protruding guide tube to pass through and to be tightly connected to the protruding guide tube. The guide part 110 is fixedly connected to the sealing part 111.

[0066] The sealing part 111 is used to seal the protruding guide tube and the guide part 110. The sealing part 111 is also sealed to the housing 100, and the sealing part 111 and the housing 100 are movable relative to each other. Since the guide part 110 is fixedly connected to the sealing part 111, it is understood that the guide part 110 is movable relative to the housing 100. When the user needs to clean the broken wire in the protruding guide tube, the user can push the guide part 110 outside the housing 100 to release the protruding guide tube by the discharge release ring 202b, thereby facilitating the user to pull out the protruding guide tube from outside the housing 100 to clean the broken wire in the protruding guide tube.

[0067] The sealing part 111 includes a sealing tube 112 and a sealing ring 113. The sealing tube 112 extends into the guide part 110 and is through which the protruding guide tube passes. The outer surface of the sealing tube 112 is in close contact with the guide part 110, and the inner surface of the sealing tube 112 is in close contact with the protruding guide tube. The sealing ring 113 extends out of the guide part 110 and is sealed to the housing 100.

[0068] The sealing tube 112 provides a certain limit to the extended guide tube, enabling the extended guide tube to deliver the filament to the 3D printer more stably.

[0069] Since the sealing ring 113 is sealed to the housing 100, it can improve the sealing performance of the housing 100 and reduce the amount of air outside the housing 100 entering the inner cavity 100a, thereby causing the wire material set in the inner cavity 100a to get damp.

[0070] At least part of the outer surface of the sealing tube 112 is in close contact with the guide part 110, and the inner surface of the sealing tube 112 is in close contact with the protruding guide tube, which serves to seal the guide part 110 and the protruding guide tube, and can prevent air outside the box 100 from entering the inner cavity 100a from the guide part 110.

[0071] In some embodiments, the sealing ring 113 is integrally formed with the sealing tube 112.

[0072] The inner surface of the sealing tube 112 is provided with a first sealing tooth 114 protruding inward along the radial direction of the sealing tube 112, and the first sealing tooth 114 is in close contact with the outer surface of the guide tube.

[0073] The protruding guide tube is a flexible tube, and the first sealing tooth 114 is in close contact with the outer surface of the protruding guide tube, and the inner surface of the protruding guide tube is in close contact with the wire.

[0074] Specifically, the first sealing tooth 114 can squeeze the protruding guide tube so that the protruding guide tube can come into close contact with the sealing tube 112, thereby sealing the gap between the protruding guide tube and the sealing tube 112 and playing a sealing role.

[0075] It should be noted that the extended feed tube serves to guide the filament. During the transfer of the filament from the inner cavity 100a to the 3D printer (outside the housing 100), the filament can move relative to the extended feed tube. Water vapor entering the feed hopper 1000 will negatively impact the filament, making it more prone to breakage. Furthermore, moisture in the filament will reduce the quality of the products printed by the 3D printer.

[0076] In the embodiments provided in this application, the location of the sealing tube 112 can be flexibly arranged. The sealing tube 112 can be located at one end of the guide portion 110 near the discharge release ring 202b, or it can be located at one end of the guide portion 110 away from the discharge release ring 202b. This application does not impose specific limitations on the location of the sealing tube 112.

[0077] The housing 100 has a through hole for the sealing ring 113 to extend into the inner cavity 100a; the housing 100 has a hollow boss 116 on the side facing the inner cavity 100a, the boss 116 is arranged around the through hole, and the boss 116 is engaged or in close contact with the sealing ring 113.

[0078] The boss 116 is used to tightly connect with the sealing ring 113. In some embodiments, the boss 116 is generally a hollow cylinder or a hollow oval cylinder. One end of the sealing ring 113, which extends into the housing 100, is fixedly connected to the boss 116, and the other end of the sealing ring 113 is fixedly connected to one end of the sealing tube 112 that extends out of the guide portion 110. The guide portion 110 passes through the boss 116, and the sealing ring 113 also passes through the boss 116. When the guide portion 110 is pressed, causing it to press against the discharge release ring 202b, the sealing ring 113 can be compressed and deformed. When no force is applied to the guide portion 110, the sealing ring 113 can actively reset itself by its own elasticity, thereby driving the guide portion 110 back to its original position, so that the guide portion 110 and the discharge release ring 202b return to their spaced-apart positions, thus putting the discharge release ring 202b in a locked position. In this way, the connecting member 200 can reliably transport wire materials.

[0079] In the embodiments provided in this application, the area between the connection between the sealing ring 113 and the boss 116 and the connection between the sealing ring 113 and the guide portion 110 along the axial direction of the through hole is bent to provide the deformation space required for the movement of the guide portion 110.

[0080] In some embodiments, see Figure 4The sealing ring 113 surrounds the guide portion 110. The sealing ring 113 is generally a hollow annular shape, such as a cylindrical corrugated shape, a rectangular corrugated shape, or an oval corrugated shape. The part of the sealing ring 113 that connects to the housing 100 is engaged or in close contact with the boss 116. The sealing ring 113 is also engaged or in close contact with the guide portion 110. The connection point between the sealing ring 113 and the sealing tube 112 and the connection point between the sealing ring 113 and the boss 116 is spaced apart.

[0081] The sealing ring 113 is bent between the connection between the sealing ring 113 and the sealing tube 112 and the connection between the sealing ring 113 and the boss 116. When the guide part 110 is pressed outside the housing 100, the bent area of ​​the sealing ring 113 can undergo elastic deformation. It should be noted that pressing the guide part 110 can be done by directly contacting the guide part 110 to make the guide part 110 move relative to the housing 100, or indirectly contacting the guide part 110 to make the guide part 110 move relative to the housing 100. Indirect contact with the guide part 110 to make the guide part 110 move relative to the housing 100 can be achieved by pressing the sealing part 111. The sealing ring 113 can be made of a flexible material, such as rubber, plastic, or polyurethane elastomer.

[0082] Along the radial direction of the sealing ring 113, the sealing ring 113 is provided with a second sealing tooth 115 on the side of the contact surface with the boss 116. When the second sealing tooth 115 moves along the axial direction of the through hole, it is in close contact with the contact surface of the boss 116.

[0083] The second sealing tooth 115 makes close contact with the contact surface of the boss 116, so that the sealing ring 113 can seal the box 100, and the air outside the box 100 is difficult to enter the inner cavity 100a at the connection between the boss 116 and the sealing ring 113.

[0084] The boss 116 has a first limiting edge 117, which extends radially inward along the boss 116; the sealing ring 113 has a first groove 118, into which the first limiting edge 117 extends.

[0085] In some embodiments, the outer surface of the sealing ring 113 facing away from the guide portion 110 is recessed to form a first groove 118, which is generally annular. The first limiting edge 117 is also annular, and its structural shape is adapted to the structural shape of the first groove 118. The first limiting edge 117 is in close contact with the surface of the first groove 118, which can play a sealing role and prevent relatively humid air outside the housing 100 from entering the housing 100.

[0086] The guide portion 110 is provided with a second limiting edge 119, and the sealing ring 113 has a second groove 120 spaced apart from the first groove 118, with the second limiting edge 119 extending into the second groove 120.

[0087] In the embodiments provided in this application, the sealing ring 113 has a recessed surface facing away from the boss 116 to form a second groove 120. The second groove 120 is generally annular. A second limiting edge 119 is formed on the outer surface of the guide portion 110. The second limiting edge 119 is also generally annular, and its structural shape matches that of the second groove 120. The second limiting edge 119 is in close contact with the surface of the second groove 120. This close contact between the second limiting edge 119 and the surface of the second groove 120 provides a sealing effect, preventing relatively humid air from outside the housing 100 from entering the housing 100. The first limiting edge 117 is in close contact with the surface of the first groove 118, and the second limiting edge 119 is in close contact with the surface of the second groove 120, providing a double sealing effect and significantly improving the sealing performance of the housing 100.

[0088] In some embodiments, see Figure 1 The guide member 109 includes a guide portion 110, a sealing portion 111, and an elastic member 123. The sealing portion 111 includes a sealing tube 112 and a sealing ring 113. The sealing tube 112 extends into the guide portion 110 and allows the protruding guide tube to pass through. The outer surface of the sealing tube 112 is in close contact with the guide portion 110, and the inner surface of the sealing tube 112 is in close contact with the protruding guide tube. The sealing ring 113 extends out of the guide portion 110 and is sealed to the housing 100.

[0089] The guide portion 110 has a limiting flange 123a protruding from its outer periphery, which is connected to the sealing ring 113; the outer surface of the housing 100 has a recess 123b, and the elastic element 123 is connected between the bottom wall of the recess 123b and the limiting flange 123a, and the sealing ring 113 is in close contact with the side wall of the recess 123b.

[0090] When the user pushes the guide 110 against the discharge release ring 202b outside the housing 100, the elastic element 123 is compressed. When the user does not apply external force to the guide 110, the elastic element 123 naturally extends and returns to its initial length (the length of the elastic element 123 before the user pushes the guide 110). The elastic element 123 will drive the guide 110 to reset and separate from the discharge release ring 202b. The elastic element 123 can be a spring.

[0091] In the embodiments provided in this application, the sealing ring 113 is a flexible elastomer. Specifically, the sealing ring 113 can be made of plastic, rubber, or polyurethane (PU), etc.

[0092] Please continue reading Figure 1 , Figure 5 , Figure 6 and Figure 7 The housing 100 includes a bottom plate 101, a side plate 102 and a base 103. The side plate 102 surrounds the bottom plate 101 and is connected to the bottom plate 101. The base 103 is disposed on the inner surface of the bottom plate 101. The guide portion 110 passes through the side plate 102 and has an angle of 15°-50° with the bottom plate 101.

[0093] In the embodiments provided in this application, the length direction of the box 100 is defined as the X direction, the width direction of the box 100 is defined as the Y direction, the height of the box 100 is defined as the Z direction, the axial direction of the guide part 110 is defined as the a direction, the axial direction of the guide part 110 is consistent with the direction through which the material guide tube extends and passes through the guide part 110, and the bottom plate 101 is parallel to the plane formed by the X direction and the Y direction.

[0094] In the embodiments provided in this application, the box body 100 further includes a box cover 124, which is hinged to the side plate 102. The box cover 124 can be opened and closed. When the box cover 124 is closed, the box cover 124, the side plate 102, and the base 103 form a closed inner cavity 100a, in which the material tray is disposed.

[0095] In the embodiments provided in this application, the guide member 109 passes through the side plate from the outside of the housing 100 and extends into the inner cavity 100a. The guide member 109 is movably connected to the side plate 102. The guide portion 110 is either disposed through the side plate 102 or open relative to the side plate 102. By disposing the guide portion 110 through the side plate 102 or making it open relative to the side plate 102, the guide portion can be operated without disassembling the side plate 102. It should be noted that the guide portion 110 being open relative to the side plate 102 also includes the case where the guide portion 110 is covered with an elastic material. With such a configuration of the guide portion 110 and the elastic material, the guide portion 110 can still be operated without disassembling the side plate, which meets the design purpose of this utility model.

[0096] In the embodiments provided in this application, the surface of the base 103 facing away from the base plate 101 is provided with a groove 104 or a hole 105, and the connecting member 200 is at least partially disposed in the groove 104 or the hole 105, the groove 104 or the hole 105 being open towards the box cover 124. When it is necessary to install or remove the connecting member 200, the user can operate directly in the inner cavity 100a without removing the base 103 to install or remove the connecting member 200. Furthermore, since the feed channel 201a in the connecting member 200 allows the built-in guide tube to extend into, the built-in guide tube is used to transport the wire. Specifically, the wire wound on the spool extends into the built-in guide tube, and the wire passes sequentially through the feed channel 201a and the discharge channel 201b from the built-in guide tube, and then extends into the discharge guide tube.

[0097] If the wire material contained in the built-in guide tube breaks, since the groove or hole accommodating the connecting part is open to the side of the box cover, the connecting part can be operated simply by opening the box cover 124. The user can easily operate in the inner cavity 100a, pull out the built-in guide tube of the feed channel 201a to clean the broken material in the built-in guide tube, without having to disassemble the base 103 to pull out the built-in guide tube.

[0098] The surface of the base 103 facing away from the base plate 101 is provided with multiple grooves 106 communicating with the grooves 104 or holes 105. It is understood that the surface of the base 103 facing the cover 124 has grooves 104 or holes 105. Each groove 106 is used to accommodate a built-in guide tube; for two adjacent grooves 106, the distance between the ends near the connecting member 200 is smaller than the distance between the ends away from the connecting member 200. It should be noted that the groove 106 can be a recessed groove formed on the surface of the base 103 facing away from the base plate 101. The groove 106 can also be a hollow groove or a groove with holes. For example, a protrusion is provided on the surface of the base 103 facing away from the base plate 101, and a groove 106 penetrating the protrusion can be provided on the protrusion.

[0099] In the embodiments provided in this application, each groove 106 is used to accommodate one built-in guide tube. If the groove 106 is a groove formed by a recess in the surface of the base 103 facing away from the base plate 101, the groove 106 can limit the built-in guide tube, and the groove 106 can also reduce the space occupied by the wire in the inner cavity 100a of the housing 100. Specifically, by accommodating the built-in guide tube by providing a groove 104 on the base 103, the built-in guide tube can share the wall thickness of the base 103, thereby reducing the height space occupied by the wire in the inner cavity 100a of the housing 100, making the hopper 1000 more compact and miniaturized.

[0100] In some embodiments, there are multiple feed channels 201a, each of which is connected to a discharge channel 201b, and each feed channel 201a corresponds one-to-one with a multiple trough 106. Since the multiple feed channels 201a are connected to the discharge channel 201b, the multiple feed channels 201a converge together through the discharge channel 201b.

[0101] In the embodiments provided in this application, in two adjacent wire grooves 106, the distance between the ends near the connecting member 200 is smaller than the distance between the ends far from the connecting member 200. Specifically, multiple wire grooves 106 gradually approach each other from the end far from the connecting member 200 to the end near the connecting member 200. The multiple built-in guide tubes corresponding to the multiple wire grooves 106 also gradually approach each other from the end far from the connecting member 200 to the end near the connecting member 200. Each wire groove 106 is bent, so that the built-in guide tubes transmit wire more smoothly and the wire is less likely to break.

[0102] The surface of the base 103 facing away from the base plate 101 also has at least one recessed area 128, which communicates with one of the two outermost wire grooves 106 among the plurality of wire grooves 106; the recessed area 128 communicates with the end of the wire groove 106 closest to the connecting member 200, rather than the end of the wire groove 106 furthest from the connecting member 200. Since the operating space of the wire groove is small, it may be inconvenient for the user's fingers to operate. By providing the recessed area 128, an operating space can be provided for the user to easily pull out or install the built-in guide tube.

[0103] In some embodiments, the number of feed channels 201a corresponds one-to-one with the number of feed release rings 202a, with each feed release ring 202a extending into the feed channel 201a. The number of feed release rings 202a also corresponds one-to-one with the number of built-in guide tubes, with each built-in guide tube passing through its corresponding feed release ring 202a and extending into the feed channel 201a. The feed release rings 202a are used to drive the latching members within the connecting member 200 to lock or release the built-in guide tubes.

[0104] The hopper 1000 also includes a material guiding component 300, which is located on the side of the hopper 1000 opposite to the connecting member 200. The material guiding component 300 has a feed inlet 304.

[0105] The feed channel 201a is connected to the discharge channel 201b. Each groove 106 is located between the guide assembly 300 and the groove 104 or hole 105. Each built-in guide tube extends from a feed port 304 and through the groove 106 into the feed channel 201a.

[0106] The guide assembly 300 corresponds to the feed channel 201a. The wire groove 106 is located between the guide assembly 300 and the groove 104, or between the guide assembly 300 and the hole 105. The feed port 304 of the guide assembly 300 allows the wire to pass through. Since the wire is wound on the reel, it will be in a bent state when the reel releases the wire. The guide assembly 300 straightens the wire by pulling it.

[0107] Please see Figure 8 , Figure 9 and Figure 10 The connecting member 200 also includes an active friction wheel 204 and a driven friction wheel 205 disposed within the discharge channel 201b. The outer periphery of the active friction wheel 204 and the outer periphery of the driven friction wheel 205 have a gap for the wire material to extend into. A button 212 is provided on the side of the connecting member 200 facing away from the base plate 101. The button 212 is located on the side of the connecting member 200 facing the cover. The button 212 is used to drive the driven friction wheel 205 to change the size of the gap between the outer periphery of the active friction wheel 204 and the outer periphery of the driven friction wheel 205. The button 212 is exposed on the side of the base 103 facing the outside of the hopper 1000.

[0108] It should be noted that the exposed arrangement of button 212 relative to the side of base 103 facing the outside of hopper 1000 means that button 212 is located on the surface of connecting member 200 facing away from base plate 101.

[0109] In some embodiments, pressing button 212 increases the gap between the outer periphery of the active friction wheel 204 and the outer periphery of the driven friction wheel 205, facilitating the removal of filament between the driven and active friction wheels 204. Releasing button 212 decreases the gap between the outer periphery of the active and driven friction wheels 205, increasing the friction between the filament and both the active and driven friction wheels 204. When the active friction wheel 204 rotates, it moves the filament through friction, feeding it into the 3D printer. The driven friction wheel 205, in conjunction with the active friction wheel 204, restricts the filament's position, ensuring stable filament feeding to the 3D printer. The active and driven friction wheels 204 constitute a drive wheel assembly located between the built-in guide tube and the extended guide tube.

[0110] The connecting member 200 also includes a linkage structure 208 and a return spring 209. The driven friction wheel 205 is rotatably connected to the linkage structure 208. The linkage structure 208 is used to drive the driven friction wheel 205 to move closer to or away from the driving friction wheel 204. The return spring 209 connects the button 212 and the linkage structure 208.

[0111] It should be noted that the driven friction wheel 205 can rotate relative to the connecting rod structure 208. When the connecting rod structure 208 moves, it can drive the driven friction wheel 205 to move to change the gap between the driven friction wheel 205 and the driving friction wheel 204.

[0112] The connecting member 200 also includes a rotating shaft 210, with a connecting rod structure 208 hinged to the rotating shaft 210. The rotating shaft 210 passes through the connecting rod structure 208, and its axial direction is the same as that of the driven friction wheel 205. The rotating shaft 210 and the driven friction wheel 205 are spaced apart, meaning there is a gap between the outer circumference of the rotating shaft 210 and the outer circumference of the driven friction wheel 205. The rotating shaft 210 is located between the driven friction wheel 205 and the return spring 209. When the button 212 is pressed to compress the return spring 209, the return spring 209 drives the connecting rod structure 208 to rotate relative to the rotating shaft 210. The connecting rod structure 208 then moves the driven friction wheel 205 to increase the gap between the driven friction wheel 205 and the driving friction wheel 204. If button 212 is released, the reset spring 209 naturally extends due to the compression force, and the linkage structure 208 rotates relative to the rotating shaft 210. The linkage structure 208 drives the driven friction wheel 205 to move to reduce the gap between the driven friction wheel 205 and the driving friction wheel 204.

[0113] The connecting member 200 also includes a Hall sensor 211, which is disposed on the periphery of the driven friction wheel 205 and is used to detect the rotational speed of the driven friction wheel 205.

[0114] The hopper 1000 also includes a drive unit for driving the active friction wheel to rotate. The drive unit can be located in the inner cavity 100a or outside the connecting member 200, and the drive unit can be a motor.

[0115] The base 103 has a heating cavity 107 for housing the heater 108, the heating cavity 107 being in communication with at least one of the groove 104, hole 105, wire groove 106, or recessed area 128; the heating cavity 107 is provided with a heat flow outlet 125 and a fan 127, the heat flow outlet 125 being in communication with at least one of the groove 104, hole 105, wire groove 106, or recessed area 128; the fan 127 is used to blow the heat flow in the heating cavity 107 toward the groove 104 or hole 105.

[0116] Heater 108 heats the air to evaporate the moisture adsorbed in the yarn, thereby dehumidifying the yarn. Fan 127 rapidly diffuses the heated air and directs it through the heat outlet 125 towards the groove 104 or hole 105. The heated air dries the yarn. Specifically, the heated air enters the discharge channel 201b of the connecting member 200 through the groove 104 or hole 105 to dry the yarn in the tray, preventing it from getting damp.

[0117] The heat outlet 125 is located at the center of the base 103. The base 103 has an orthogonal first direction and a second direction. The projection point of the center point of the heat outlet 125 onto the base plate is O. The line segment of the base 103 passing through point O along the first direction is AB, and the line segment of the base 103 passing through point O along the second direction is CD. OA / AB is between 0.35 and 0.65, and / or OC / CD is between 0.35 and 0.65. Because the heat outlet 125 is located at the center of the base 103, the heated air can diffuse more quickly to all parts of the inner cavity 100a, and the heated air can dehumidify the wire. The first direction is the X-axis direction, and the second direction is the Y-axis direction.

[0118] The base 103 has a drying chamber 129 for containing a desiccant. A groove 104 or a hole 105 is located between the drying chamber 129 and the heating chamber 107. The desiccant is used to absorb moisture from the air in the inner cavity 100a, preventing the wire on the tray from becoming damp. The groove 104 or the hole 105, located between the drying chamber 129 and the heating chamber 107, allows the heat flow to further dry the air near the connecting member 200, making the wire inside the connecting member 200 less prone to moisture. The desiccant absorbs moisture from the air near the hopper 1000 and the connecting member 200, preventing the wire from becoming damp.

[0119] Please refer to the embodiments provided in this application. Figure 11 and Figure 12 The connecting member 200 also includes a flexible release plate 203, which connects multiple feed release rings 202a extending out of the feed channel 201a to one side, making the connection of the multiple feed release rings 202a into a whole, making the connection of the multiple feed release rings 202a more stable, making it easier to operate and reducing the number of operation sequences during production and assembly. When the feed release ring 202a is pressed to switch the state of the feed release ring 202a from locked to released, the flexible release plate 203 can undergo elastic deformation, and pressing one feed release ring 202a will not affect the state switching of other release rings.

[0120] Multiple feed release rings 202a are arranged in an arc or zigzag pattern, with their axial direction aligned with the axial direction of the groove 106. The flexible release plate 203 arches away from the feed channel 201a. When the feed release rings 202a of the multiple feed channels 201a are pressed, the flexible release plate 203 provides a larger operating area for the feed release rings 202a, which improves the ease of operation of the feed release rings 202a in confined spaces. It should be noted that the recessed area 128 in the base 103 facilitates manual pressing of the flexible release plate 203 by the user.

[0121] The distance between any two adjacent feed channels 201a gradually increases from the end connected to the discharge channel 201b to the end away from the discharge channel 201b. When the release ring of the feed channel 201a is pressed, the flexible release plate 203 will have a larger deformation area to prevent pressing one feed release ring 202a from affecting the state of other feed release rings 202a.

[0122] Each feed release ring 202a passes through the flexible release plate 203 along its thickness direction. The thickness of the flexible release plate 203 is less than the dimension of the feed release ring 202a along its thickness direction. The flexible release plate 203 is a plastic component with a thickness of 0.5mm-2mm. While the flexible release plate 203 can be a plastic component, if its thickness is too small (e.g., less than 0.5mm), it may lead to excessive wall thickness variations, making manufacturing difficult (for example, in injection molding, the wall thickness must meet certain conditions and the variation cannot be too large). If the flexible release plate 203 is too large (e.g., greater than 2mm), pressing any feed release ring 202a may easily affect the state of the other feed release rings 202a.

[0123] In a 3D printing system, filament is fed into the 3D printer through the feed inlet. The filament is under tension as it passes through the feed inlet. During the feeding process, the filament will continuously wear against the feed inlet. The worn feed inlet will generate a large conveying resistance, causing damage to the filament.

[0124] Please see Figures 13 to 20In the embodiments provided in this application, the material guiding assembly 300 includes a material guiding component 301, a reinforcing component 302, an active feeding wheel 319, and a driven feeding wheel 320. The material guiding component 301 is mounted on the base 103, and the reinforcing component 302 is mounted on the material guiding component 301. The material guiding component 301 and the reinforcing component 302 form a feeding channel 303, which includes an inlet 304 and an outlet 305. The active feeding wheel 319 and the driven feeding wheel 320 are both connected to the material guiding component 301. The active feeding wheel 319 and the driven feeding wheel 320 are spaced apart and are used to push the wire material from the inlet 304 side to the outlet 305 side to extrude it into the feeding channel 303.

[0125] The guide component 301 refers to the material guiding part between the wire and the feed wheel 319, and can be one or a combination of multiple parts. The hardness of the reinforcing component 302 is greater than that of the guide component 301. Thus, the wear resistance of the reinforcing component 302 is better than that of the guide component 301, which can effectively improve the reliability of the guide assembly 300 and reduce the wear of the wire.

[0126] At least a portion of the feeding channel 303 has a circular cross-section perpendicular to the axial direction of the feeding channel 303, and the feeding channel 303 as a whole is funnel-shaped.

[0127] In some embodiments, the reinforcing member 302 is a perforated post structure. Along the axial direction of the feeding channel 303, the dimension of the reinforcing member 302 is greater than or equal to 2.40 mm and less than or equal to 3.60 mm. The dimension of the reinforcing member 302 is denoted as L1. Figure 14 As shown, for example, the value of dimension L1 of the reinforcing member 302 can be 2.40mm, 2.58mm, 2.70mm, 2.82mm, 3.00mm, 3.40mm or 3.60mm, and so on.

[0128] In one embodiment, the reinforcing member 302 and the guide member 301 are stacked axially along the feeding channel 303, with the reinforcing member 302 further away from the feed inlet 304 relative to the guide member 301. That is, the opening on the side of the guide member 301 away from the reinforcing member 302 forms the feed inlet 304, and the opening on the side of the reinforcing member 302 away from the guide member 301 forms the discharge outlet 305. In another embodiment, the reinforcing member 302 is embedded within the guide member 301.

[0129] The feeding channel 303 includes a flared hole section 317a and a guide channel section 317b, wherein the flared hole section 317a is disposed near the feed inlet 304, and the guide channel section 317b is disposed near the active feed wheel 319. For example, the guide member 301 forms the flared hole section 317a and the guide channel section 317b, which are combined to form the guide member 301 as a whole. In some embodiments, the flared hole section 317a and the guide channel section 317b are integrally formed. In some embodiments, the flared hole section 317a and the guide channel section 317b are separate structures, connected and fixed to form the guide member 301.

[0130] like Figure 15 As shown, the reinforcing member 302 covers a portion of the flared hole section 317a and a portion of the guide channel section 317b. Alternatively, the reinforcing member 302 covers a portion of the flared hole section 317a near the guide channel section 317b, for example, as... Figure 16 As shown, the reinforcing member 302 is integrally disposed in the flared hole section 317a along the axial direction of the feeding channel 303. The end of the flared hole section 317a away from the feed inlet 304 is designated as the first end. The distance from the reinforcing member 302 to the first end is less than or equal to the distance from the reinforcing member 302 to the feed inlet 304. The section of the flared hole section 317a closest to the active feed wheel 319 experiences the most wear from the filament, especially in high-speed printing scenarios. The flared hole section 317a is easily worn, which greatly reduces the service life of the guide component 301. Furthermore, damage to this section generates significant conveying resistance. The reinforcing member 302 at least covers the section of the flared hole section 317a closest to the active feed wheel 319. The reinforcing member 302, with better wear resistance than the guide component 301, is less prone to damage, thus improving the reliability of the guide assembly 300.

[0131] Furthermore, the inner wall surface of the guide member 301 is formed with an installation groove 306, which is used to install the reinforcing member 302 and to position the reinforcing member 302.

[0132] Along the axial direction of the feeding channel 303, the inner wall surface of the flared hole section 317a gradually narrows from the feed inlet 304 to the active feed wheel 319. The reinforcing member 302 at least covers the inner wall surface of the flared hole section 317a at one end near the guide channel section 317b. Thus, the reinforcing member 302 is provided at the position of the flared hole section 317a where the wire wear is most severe, which improves the reliability of the guide assembly 300 and reduces the degree of wear on the wire.

[0133] like Figure 17As shown, the reinforcing member 302 is a hollow cylindrical shape, and the mounting groove 306 has at least three groove wall surfaces along the radial direction of the reinforcing member 302. The mounting groove 306 has a connecting port 321 that connects to the outside of the guide member 301, and the connecting port 321 is used for the reinforcing member 302 to be inserted into the mounting groove 306. The outer peripheral surface of the reinforcing member 302 is in close contact with at least two oppositely arranged groove wall surfaces.

[0134] The reinforcing member 302 is installed from the connecting port 321 into the mounting slot 306. After long-term use, the reinforcing member 302 can be easily replaced to ensure the reliability of the material guiding assembly 300 and reduce the wear on the wire.

[0135] Furthermore, a notch 322 is formed on the groove wall surface. The outer peripheral surface of the reinforcing member 302 is tightly fitted with the groove wall surface where the notch 322 is located and the groove wall surface opposite to the notch 322. The notch 322 communicates with the mounting groove 306, and the axial direction of the notch 322 is staggered with the axial direction of the connecting opening 321. The notch 322 at least accommodates a portion of the outer peripheral surface of the reinforcing member 302. After the reinforcing member 302 is inserted into the mounting groove 306 through the connecting opening 321, a portion of the outer peripheral surface of the reinforcing member 302 is engaged within the notch 322, thereby fixing it within the mounting groove 306.

[0136] A protrusion 323 is formed on the groove wall surface where the notch 322 is located, and / or on the groove wall surface opposite to the notch 322. Along the insertion direction of the reinforcing member 302, the protrusion 323 covers a portion of the groove wall surface between the notch 322 and the connecting opening 321; that is, along the insertion direction of the reinforcing member 302, the protrusion 323 is located between the connecting opening 321 and the notch 322. The protrusion 323 serves to provide an indication for the reinforcing member 302 during insertion, allowing it to undergo a tightening-then-loosening process during assembly, thus indicating proper assembly. Furthermore, the protrusion 323 can also limit and fix the reinforcing member 302 after it extends into the notch 322, reducing the possibility of the reinforcing member 302 sliding out of the mounting groove 306.

[0137] For example, a protrusion 323 is formed on the groove wall surface where the notch 322 is located. Another example is that a protrusion 323 is formed on the groove wall surface opposite to the notch 322. Yet another example is that protrusions 323 are formed on both the groove wall surface where the notch 322 is located and the groove wall surface opposite to the notch 322. In this way, the protrusions 323 on both sides can further strengthen the restraint of the reinforcing member, reducing the possibility of the reinforcing member 302 sliding out of the mounting groove 306.

[0138] The inner wall surface of the reinforcing member 302 has at least a partial section forming a cylindrical hole 316, or the inner wall surface of the reinforcing member 302 has a minimum diameter position. Along the axial direction of the feeding channel 303, the distance between the center of the active feed wheel 319 and the edge of the cylindrical hole 316 on the side away from the feed inlet 304 is greater than or equal to 7.0 mm and less than or equal to 11.02 mm. For example, this distance can be 7.0 mm, 7.34 mm, 7.80 mm, 8.25 mm, 8.67 mm, 9.18 mm, 9.50 mm, 10.26 mm, 10.64 mm, 10.85 mm, or 11.02 mm. Alternatively, along the axial direction of the feeding channel 303, the distance from the center of the active feeding wheel 319 to the minimum diameter position of the inner wall surface of the reinforcing member 302 is greater than or equal to 7.0 mm and less than or equal to 15 mm. For example, this distance can be 7.0 mm, 8.25 mm, 9.18 mm, 10.26 mm, 11.02 mm, 13.3 mm, 14.5 mm, or 15.0 mm.

[0139] In one embodiment, the inner wall surface of the reinforcing member 302 has a minimum diameter position, which can be a circular arc transition or a cylindrical hole 316 transition. For example, if the minimum position is a circular arc transition, a curved transition is provided on the inner wall surface of the reinforcing member 302 to connect the top and bottom surfaces of the reinforcing member 302, forming the minimum diameter position at the curved transition. By designing a suitable diameter at the minimum diameter position on the inner wall surface of the reinforcing member 302, the positioning of the wire is more accurate, making it as centrally located as possible, thereby reducing the conveying resistance of the wire and making the wire as straight as possible during conveying. This facilitates accurate measurement of the conveying resistance when the active feed wheel 319 performs closed-loop control, resulting in more precise control of the conveying speed. In addition, it can also minimize the contact between the wire and the guide member 301, reducing wear on the guide member 301 and improving the accuracy of conveying.

[0140] When the minimum diameter position is transitioned by an arc, the minimum diameter position of the inner wall surface of the reinforcing member 302 can be the middle position of the arc transition position along the axial direction of the feeding channel 303, or it can be the edge of the minimum diameter position away from the feed inlet 304, or it can be the edge of the minimum diameter position close to the feed inlet 304.

[0141] The distance from the center of the active feed wheel 319 to the minimum diameter position of the inner wall surface of the reinforcing member 302 is controlled to be [7.0mm, 15.0mm], so as to avoid the inability to straighten the positioning wire due to the distance being too close. At the same time, if the wire hardness is insufficient, it reduces the possibility of wire deformation between the two contact points due to the distance being too far.

[0142] In another embodiment, at least a portion of the inner wall surface of the reinforcing member 302 is formed with a cylindrical hole 316, wherein the cylindrical hole 316 extends axially along the feeding channel 303.

[0143] In this application, the location of the cylindrical hole 316 is the position where the inner wall surface of the reinforcing member 302 has the smallest diameter. The distance between the center of the active feed wheel 319 and the edge of the cylindrical hole 316 away from the feed inlet 304 is denoted as L2. Figure 18 As shown. The distance between the center of the active feed wheel 319 and the edge of the cylindrical hole 316 away from the feed inlet 304 is controlled to be [7.0mm, 11.02mm]. This avoids the wire from being too close to be unable to be straightened and positioned, and also avoids the wire from being too far apart to prevent deformation between the two contact points if the wire is not hard enough. By designing a suitable diameter for the cylindrical hole 316, the positioning of the wire is made more accurate, making it as centered as possible, thereby reducing the wire's conveying resistance and making the wire as straight as possible during conveying. This facilitates accurate measurement of the conveying resistance when the active feed wheel 319 performs closed-loop control, resulting in more precise control of the conveying speed. In addition, it also minimizes the contact between the wire and the guide component 301, reducing wear on the guide component 301 and improving the accuracy of conveying.

[0144] The inner wall surface of the reinforcing member 302 forms a funnel-shaped hole in the direction from the feed port 304 to the active feed wheel 319. The inner wall surface of the reinforcing member 302 is connected to the inner wall surface of the funnel-shaped hole section 317a. At least a portion of the inner wall surface of the reinforcing member 302 forms a cylindrical hole 316.

[0145] In one embodiment, the ratio of the diameter of the cylindrical hole 316 to the diameter of the guide channel section 317b on the guide member 301 is greater than or equal to 0.95 and less than or equal to 1.05. That is, the diameter of the cylindrical hole 316 can be smaller than the diameter of the guide channel section 317b, or it can be greater than or equal to the diameter of the guide channel section 317b. It should be noted that the diameter of the guide channel section 317b on the guide member 301 is the diameter of the guide channel section 317b at the entrance near the side of the flared hole section 317a, or it can be the average diameter of the guide channel section 317b from the entrance to the active feed wheel 319.

[0146] In another embodiment, the ratio of the diameter of the cylindrical hole 316 to the diameter of the guide channel section 317b on the guide member 301 is greater than or equal to 0.90 and less than 1.0, that is, the diameter of the cylindrical hole 316 is smaller than the diameter of the guide channel section 317b. The inner wall of the cylindrical hole 316 can accurately define the wire material at that position. At the same time, the active feed wheel 319 and the driven feed wheel 320 clamp the wire material, which can better position the wire material between the cylindrical hole 316 and the active feed wheel 319, making the wire material as centrally located as possible. This ensures that the wire material between the cylindrical hole 316 and the active feed wheel 319 is in a taut state, which can overcome the adverse effects of the wire material being in a bent state when released from the wire reel. This allows the wire material to be conveyed as taut as possible, which is beneficial to improving the meshing accuracy of the active feed wheel 319 and the driven feed wheel 320. This facilitates the accurate measurement of conveying resistance and conveying distance during closed-loop control, making the wire material conveying control more precise.

[0147] For example, the diameter of the cylindrical hole 316 is 0.2mm-0.6mm larger than the diameter of the wire. For instance, the diameter of the cylindrical hole 316 is 0.3mm larger than the diameter of the wire, or 0.5mm larger, or 0.6mm larger. By setting a smaller gap between the cylindrical hole 316 and the diameter of the wire, the position of the wire can be more precisely limited, thereby improving the positioning accuracy of the wire and improving the meshing control accuracy of the active feed wheel 319 and the driven feed wheel 320. In one embodiment, when the diameter of the wire is 1.75mm, the diameter of the cylindrical hole 316 is between 1.95mm and 2.35mm.

[0148] The diameter of the material guide channel section 317b is 0.1mm-0.5mm larger than the diameter of the cylindrical hole 316. For example, the diameter of the material guide channel section 317b is 0.1mm larger than the diameter of the cylindrical hole 316, or the diameter of the material guide channel section 317b is 0.35mm larger than the diameter of the cylindrical hole 316, or the diameter of the material guide channel section 317b is 0.5mm larger than the diameter of the cylindrical hole 316.

[0149] In one embodiment, the diameter of the cylindrical hole 316 along the radial direction of the feeding channel 303 is greater than or equal to 1.9 mm and less than or equal to 2.6 mm. It can be understood that the diameter of the cylindrical hole 316 is the aperture size of the cylindrical hole 316. The diameter of the cylindrical hole 316 is denoted as D1, such as... Figure 19As shown, for example, the diameter D1 of the cylindrical hole 316 can be 1.9mm, 1.95mm, 2.01mm, 2.16mm, 2.25mm, 2.42mm, or 2.6mm, and not all are listed here. Specifically, the diameter of the cylindrical hole 316 can be determined according to the diameter of the wire. Typically, the diameter of the wire is around 1.75mm, therefore the cylindrical hole 316 cannot be too small, otherwise it will easily over-compress the wire, leading to wire breakage or accelerated wear of the reinforcing member 302. If the diameter of the cylindrical hole 316 is greater than 2.6mm, the channel formed by the cylindrical hole 316 is too large, and the wire cannot be straightened, easily leading to deformation. By setting the diameter of the cylindrical hole 316 to be slightly larger than the diameter of the wire, both accurate positioning of the wire and prevention of wire compression can be achieved. In this application, by reasonably determining the diameter of the cylindrical hole 316, the phenomenon of wire breakage or deformation can be effectively reduced or avoided.

[0150] Along the axial direction of the inner wall surface of the reinforcing member 302, the length of the cylindrical hole 316 is greater than or equal to 0.2 mm and less than or equal to 1.6 mm. The length of the cylindrical hole 316 is denoted as L3. Figure 19 As shown, for example, the length L3 of the cylindrical hole 316 can be 0.2mm, 0.5mm, 0.92mm, 1.26mm, 1.35mm, or 1.6mm, and not all are listed here. By setting the cylindrical hole 316 to a certain length, the cylindrical hole 316 can have a better wire positioning effect. Since the friction between the cylindrical hole 316 segment and the wire is relatively large, the cylindrical hole 316 should not be too long. By controlling the length of the cylindrical hole 316, the material and volume of the reinforcing member 302 can also be saved.

[0151] The inner wall surface of the reinforcing member 302 includes a main arc surface 315, which is in contact with the inner wall surface of the flared hole section 317a. Along the axial direction of the feeding channel 303 away from the feed port 304, the diameter of the main arc surface 315 gradually decreases until it is equal to the diameter of the cylindrical hole 316.

[0152] The edge of the main arc surface 315 away from the feed inlet 304 is directly connected to the cylindrical hole 316. The main arc surface 315 can be a smooth curved surface. When the wire passes through the main arc surface 315, the friction between the main arc surface 315 and the wire can be reduced, thereby reducing the wear of the wire. For example, the guide 301 is a plastic component, and the reinforcing member 302 is a ceramic component. Ceramic has high hardness and a low coefficient of friction, making it very suitable for wire output. The reinforcing member 302 and the guide 301 can be connected by insert injection molding. In some embodiments, the molded reinforcing member 302 can be placed in an injection mold, and then the plastic material of the guide 301 can be poured into the injection mold, connecting the reinforcing member 302 and the guide 301 into one piece.

[0153] The guide member 301 has a first step 307 and / or a second step 308. For example, the guide member 301 has a first step 307 and a second step 308, with the second step 308 being further away from the feed inlet 304 than the first step 307. A mounting groove 306 is formed between the first step 307 and the second step 308.

[0154] Specifically, the first step 307 includes a first circumferential surface 309 and a first plane 310. The first circumferential surface 309 extends along the axial direction of the feeding channel 303 and encloses at least a portion of the feeding channel 303. The first plane 310 is perpendicular to the axial direction of the feeding channel 303 and fits against the top surface of the reinforcing member 302, so that the reinforcing member 302 is interference-fitted into the guide member 301, and the reinforcing member 302 is not prone to shaking after installation. The top surface of the reinforcing member 302 is the side of the reinforcing member 302 facing the feed inlet 304 along the axial direction of the feeding channel 303. By setting the first step 307, the minimum wall thickness requirement of the guide member 301 is met, avoiding the problem of the guide member 301 being too thin and difficult to manufacture, resulting in insufficient structural strength of the guide member 301, or avoiding the problem of the guide member 301 being too thick and affecting the conveying or retraction of the wire.

[0155] Along the axial direction of the feeding channel 303, the distance from the top surface of the guide member 301 to the first plane 310 is greater than or equal to 2.70 mm and less than or equal to 4.00 mm, wherein the top surface of the guide member 301 is the side of the guide member 301 furthest from the discharge port 305; the distance from the top surface of the guide member 301 to the first plane 310 is denoted as L4. Figure 14 As shown, for example, the distance L4 can be 2.70mm, 3.00mm, 3.24mm, 3.40mm, 3.67mm, 3.92mm or 4.00mm.

[0156] The second step 308 includes a connected second circumferential surface 311 and a second plane 312. The second circumferential surface 311 extends along the axial direction of the feeding channel 303 and encloses at least a portion of the feeding channel 303. The second plane 312 is perpendicular to the axial direction of the feeding channel 303 and fits against the bottom surface of the reinforcing member 302. The bottom surface of the reinforcing member 302 is the side facing the discharge port 305 along the axial direction of the feeding channel 303. The top and bottom surfaces of the reinforcing member 302 are interference-fitted with the guide member 301. Specifically, the top and bottom surfaces of the reinforcing member 302 are respectively fitted with the first plane 310 and the second plane 312, so that the reinforcing member 302 is interference-fitted into the guide member 301, and the reinforcing member 302 is less prone to shaking after installation.

[0157] Along the axial direction of the feeding channel 303, the second plane 312 is disposed opposite to the first plane 310, and a mounting groove 306 is formed between the second plane 312 and the first plane 310. The second circumferential surface 311 extends axially along the feeding channel 303 to the discharge port 305.

[0158] Along the radial direction of the feeding channel 303, the diameter of the first circumferential surface 309 is larger than the diameter of the second circumferential surface 311. For example, along the radial direction of the feeding channel 303, the diameter of the first circumferential surface 309 is greater than or equal to 4.88 mm and less than or equal to 7.32 mm. The diameter of the first circumferential surface 309 is denoted as D2. Figure 19 As shown, for example, the diameter D2 of the first circumferential surface 309 can be 4.88mm, 5.00mm, 5.23mm, 5.58mm, 5.88mm, 6.10mm, 6.54mm, 7.00mm or 7.32mm, and so on.

[0159] For example, along the radial direction of the feeding channel 303, the diameter of the second circumferential surface 311 is greater than or equal to 2.0 mm and less than or equal to 3.0 mm. The diameter of the second circumferential surface 311 is denoted as D3. For example, the diameter D3 of the second circumferential surface 311 can be 2.00 mm, 2.26 mm, 2.34 mm, 2.48 mm, 2.64 mm, 2.74 mm or 3.0 mm, and so on.

[0160] For example, the inner wall surface of the guide member 301 also includes a third circumferential surface 318. The third circumferential surface 318 extends axially along the feeding channel 303 and connects between the first plane 310 and the second plane 312. The third circumferential surface 318 is the inner wall surface of the mounting groove 306, and at least part of the third circumferential surface 318 abuts against the outer wall surface of the reinforcing member 302. It can be understood that the third circumferential surface 318 is a circumferential surface formed by connecting multiple groove wall surfaces of the mounting groove 306. The top and bottom surfaces of the reinforcing member 302 are interference-fitted with the guide member 301, and the reinforcing member 302 is not prone to shaking after installation.

[0161] The inner wall surface of the reinforcing member 302 includes an upper arc surface 313 and a lower arc surface 314. Along the axial direction of the feeding channel 303, the upper arc surface 313, the main arc surface 315, the circumferential surface forming the cylindrical hole 316, and the lower arc surface 314 are connected sequentially. The upper arc surface 313 connects to the top surface of the reinforcing member 302 at its edge near the feed inlet 304 along the axial direction of the feeding channel 303. The lower arc surface 314 connects to the bottom surface of the reinforcing member 302 at its edge away from the feed inlet 304 along the axial direction of the feeding channel 303.

[0162] For example, the diameter of the upper arcuate surface 313 at its edge away from the feed inlet 304 in the axial direction of the feeding channel 303 is smaller than the diameter of the first circumferential surface 309. And / or, the diameter of the lower arcuate surface 314 at its edge near the feed inlet 304 in the axial direction of the feeding channel 303 is smaller than the diameter of the second circumferential surface 311. Preferably, the diameter of the upper arcuate surface 313 at its edge away from the feed inlet 304 in the axial direction of the feeding channel 303 is smaller than the diameter of the first circumferential surface 309, and the diameter of the lower arcuate surface 314 at its edge near the feed inlet 304 in the axial direction of the feeding channel 303 is smaller than the diameter of the second circumferential surface 311.

[0163] The connection between the upper arc surface 313 and the top surface of the reinforcing member 302 is recessed relative to the connection between the first circumferential surface 309 and the first plane 310. In this way, at the connection between the reinforcing member 302 and the first step 307, the wire material mainly contacts the arc surface of the reinforcing member 302 with higher hardness rather than the first circumferential surface 309 with lower hardness, which can reduce the wear on the feed port 304.

[0164] Along the radial direction of the feeding channel 303, the diameter of the lower arc surface 314 near the edge of the feed inlet 304 in the axial direction of the feeding channel 303 is smaller than the inner diameter of the second circumferential surface 311. That is, the connection between the lower arc surface 314 and the bottom surface of the reinforcing member 302 is recessed relative to the connection between the second circumferential surface 311 and the second plane 312. In this way, the wire will not scrape against the connection between the second plane 312 and the second circumferential surface 311, ensuring that the wire mainly contacts the arc surface of the reinforcing member 302, reducing wear on the wire. In addition, it can effectively reduce or avoid excessive wear on the reinforcing member 302 caused by the extrusion force of the active feed wheel 319 due to wire deflection.

[0165] Along the axial direction of the feeding channel 303 away from the feed inlet 304, the diameter of the upper arc surface 313 gradually decreases until it is equal to the diameter of the main arc surface 315 near the edge of the feed inlet 304 along the axial direction of the feeding channel 303. This arrangement ensures that the wire material contacts the arc surface of the reinforcing member 302 rather than the guide member 301, reducing wear on the guide member 301 caused by the wire material.

[0166] Along the axial direction of the feeding channel 303 near the feed inlet 304, the diameter of the lower arc surface 314 gradually decreases until it is equal to the diameter of the cylindrical hole 316.

[0167] In summary, the inner wall surface that encloses the cylindrical hole 316 is the smallest diameter part of the inner wall surface of the reinforcing member 302, and this inner wall surface extends axially along the feeding channel 303. This design allows for more precise positioning of the wire, ensuring it is centered as much as possible, thereby reducing the conveying resistance and ensuring the wire is conveyed as taut as possible. This balances precise positioning of the wire and prevents it from being squeezed. Furthermore, by setting the inner wall surface of the cylindrical hole 316 as the smallest diameter part of the inner wall surface of the reinforcing member 302, and by rationally determining the diameter of the cylindrical hole 316, wire breakage or deformation can be effectively reduced or avoided.

[0168] The active feed roller 319 and the driven feed roller 320 are located on the side of the reinforcing member 302 facing the discharge port 305, that is, both the active feed roller 319 and the driven feed roller 320 are far away from the feed port 304 relative to the reinforcing member 302. The active feed roller 319 and the driven feed roller 320 are located on opposite sides of the wire material so that the wire material is clamped and conveyed or retracted by the active feed roller 319 and the driven feed roller 320.

[0169] Specifically, at least a portion of the active feed wheel 319 and at least a portion of the driven feed wheel 320 protrude from the second circumferential surface 311 and are located within the feed channel 303. The wire material located at the second circumferential surface 311 is clamped by the active feed wheel 319 and the driven feed wheel 320, and the wire material located at the reinforcing member 302 is clamped by the reinforcing member 302. Thus, the wire material between the active feed wheel 319 and the reinforcing member 302 is in a taut state.

[0170] For example, along the radial direction of the feeding channel 303, the distance between the center of the driving feeding wheel 319 and the center of the driven feeding wheel 320 is greater than or equal to 8.10 mm and less than or equal to 12.20 mm. This distance can be denoted as L5. Figure 18 As shown, for example, the distance L5 between the center of the active feed wheel 319 and the center of the driven feed wheel 320 is 8.14mm, 8.65mm, 9.38mm, 10.18mm, 10.50mm, 11.65mm or 12.20mm.

[0171] For example, along the radial direction of the feeding channel 303, the distance between the center of the driven feed wheel 320 and the central axis of the feeding channel 303 is greater than or equal to 6.0 mm and less than or equal to 6.3 mm. This distance is denoted as L6. Figure 15As shown, for example, the distance L6 between the center of the driven feed wheel 320 and the central axis of the feed channel 303 is 6.07mm, 6.14mm, 6.19mm, 6.24mm, 6.27mm or 6.30mm.

[0172] The material guide assembly 300 also has a transparent outer cover 324. The material guide assembly 300 is disposed inside the outer cover 324. An indicator 325 is also provided inside the outer cover 324. The indicator 325 is disposed opposite to the material tray. The indicator 325 and the material tray are disposed on opposite sides of the radial direction of the feed inlet 304. The indicator 325 has a lamp bead and a ring-shaped or surface-shaped light guide 326. The main light-emitting surface of the light guide 326 faces the axial direction of the feed inlet 304.

[0173] The feed inlet 304 of the guide component 301 is located outside the outer cover 324, facilitating the insertion of wire into the feeding channel 303 from the feed inlet 304. It should be noted that there are multiple trays, each corresponding to one guide component 301, and each tray corresponding to one indicator 325. In the relatively opposite arrangement of the trays and indicator 325, the indicator 325 uses light emitted from the light guide 326 to indicate status information such as wire insertion and feeding failure. Furthermore, the indicator 325 and the tray are located on opposite sides of the feed inlet 304, preventing the indicator 325 from being obstructed during wire handling.

[0174] For example, the material guiding assembly 300 has a mounting portion 327 with a mounting plane 328 facing the feed inlet 304. A material guide 301 and an indicator 325 are mounted on the mounting plane 328. The mounting plane 328 is parallel to the side of the base plate 101 facing the material guide 301. The material guide 301 is inclined on the mounting plane 328; specifically, a plane on the material guide 301 perpendicular to the axial direction of the feeding channel 303 intersects the mounting plane 328.

[0175] The projection distance of the line connecting the center of the light guide 326 and the center of the feed inlet 304 on the mounting plane 328 is greater than or equal to 20mm and less than or equal to 60mm. That is, the line length of the orthographic projection of the line connecting the center of the light guide 326 and the center of the feed inlet 304 on the base plate 101 is greater than or equal to 20mm and less than or equal to 60mm. In this way, the center distance between the center of the light guide 326 and the center of the feed inlet 304 is not too small, so that the status information such as the insertion of the wire into the feed inlet 304 or the conveying failure of the feed inlet 304 is not easily blocked by operation. At the same time, while ensuring that the status information is not blocked, the center distance between the center of the light guide 326 and the center of the feed inlet 304 is not too large, which would cause the material guiding assembly 300 to occupy too much space.

[0176] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0177] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0178] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0179] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0180] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A material guiding assembly, characterized in that, The material guiding assembly includes a material guiding component and a reinforcing component. The reinforcing component is installed on the material guiding component, and the material guiding component and the reinforcing component form a feeding channel. The feeding channel includes an inlet and an outlet. The hardness of the reinforcing component is greater than that of the material guiding component.

2. The material guiding assembly as described in claim 1, characterized in that, The material guiding assembly further includes an active feeding wheel, and the feeding channel includes a flared hole section and a material guiding channel section, wherein the flared hole section is located near the feed inlet, and the material guiding channel section is located near the active feeding wheel. The reinforcing member covers part of the flared hole section and part of the material guiding channel section, or the reinforcing member covers a section of the flared hole section near the material guiding channel section.

3. The material guiding assembly as described in claim 2, characterized in that, The inner wall surface of the guide member is formed with an installation groove for installing the reinforcing member. Along the axial direction of the feeding channel, the inner wall surface of the horn-shaped hole section gradually narrows from the feed inlet to the active feed wheel. The reinforcing member at least covers one end of the inner wall surface of the horn-shaped hole section near the section of the guide channel.

4. The material guiding assembly as described in claim 3, characterized in that, The reinforcing member is generally hollow cylindrical in shape. Along the radial direction of the reinforcing member, the mounting groove has at least three groove wall surfaces. The mounting groove has a connecting port that connects to the outside of the guide member. The connecting port is used for the reinforcing member to be inserted into the mounting groove. The outer peripheral surface of the reinforcing member is in close contact with at least two oppositely arranged groove wall surfaces.

5. The material guiding assembly as described in claim 4, characterized in that, The groove wall surface is also formed with a notch, and the outer peripheral surface of the reinforcing member is in close contact with the groove wall surface where the notch is located and the groove wall surface opposite to the notch; the notch is connected to the mounting groove, and the axial direction of the notch is staggered with the axial direction of the connecting opening, and the notch at least accommodates a portion of the outer peripheral surface of the reinforcing member.

6. The material guiding assembly as described in claim 5, characterized in that, The groove wall surface where the notch is located, and / or the groove wall surface opposite the notch, also has a protrusion formed, and along the insertion direction of the reinforcing member, the protrusion covers a portion of the groove wall surface between the notch and the communication opening.

7. The material guiding assembly as described in claim 2, characterized in that, The inner wall surface of the reinforcing member is formed into a funnel-shaped hole in the direction from the feed inlet to the active feed wheel. The inner wall surface of the reinforcing member is in contact with the inner wall surface of the funnel-shaped hole section. At least a portion of the inner wall surface of the reinforcing member forms a cylindrical hole. The ratio of the diameter of the cylindrical hole to the diameter of the guide channel section on the guide member is greater than or equal to 0.95 and less than or equal to 1.

05.

8. The material guiding assembly as described in claim 2, characterized in that, The inner wall surface of the reinforcing member is formed into a funnel-shaped hole in the direction from the feed inlet to the active feed wheel. The inner wall surface of the reinforcing member is in contact with the inner wall surface of the funnel-shaped hole section. At least a portion of the inner wall surface of the reinforcing member forms a cylindrical hole. The ratio of the diameter of the cylindrical hole to the diameter of the guide channel section on the guide member is greater than or equal to 0.9 and less than 1.

0.

9. The material guiding assembly as described in claim 7 or 8, characterized in that, The inner wall surface of the reinforcing member includes a main arc surface, which is connected to the inner wall surface of the horn-shaped hole section; along the axial direction of the feeding channel away from the feed inlet, the diameter of the main arc surface gradually decreases until it is equal to the diameter of the cylindrical hole.

10. The material guiding assembly as claimed in claim 9, characterized in that, The guide member has a first step, the first step includes a first circumferential surface and a first plane connected together, the first circumferential surface extends along the axial direction of the feeding channel, the first plane is perpendicular to the axial direction of the feeding channel, and the first plane is in contact with the top surface of the reinforcing member. And / or, the guide member further forms a second step, the second step being further away from the feed inlet relative to the first step, the second step including a connected second circumferential surface and a second plane, the second circumferential surface extending along the axial direction of the feeding channel, the second plane being perpendicular to the axial direction of the feeding channel, and the second plane being in contact with the bottom surface of the reinforcing member.

11. The material guiding assembly as claimed in claim 10, characterized in that, The inner wall surface of the guide component includes a third circumferential surface, which extends along the axial direction of the feeding channel and connects between the first plane and the second plane. The third circumferential surface is the inner wall surface of the mounting groove of the guide component. The third circumferential surface abuts against at least a portion of the outer wall surface of the reinforcing member. The top surface and bottom surface of the reinforcing member are interference-fitted with the guide component.

12. The material guiding assembly as claimed in claim 10, characterized in that, The inner wall surface of the reinforcing member includes an upper arc surface and a lower arc surface. The upper arc surface is connected to the top surface of the reinforcing member at the edge near the feed inlet in the axial direction of the feeding channel, and the lower arc surface is connected to the bottom surface of the reinforcing member at the edge away from the feed inlet in the axial direction of the feeding channel. The diameter of the upper arc surface at the edge of the feeding channel away from the feed inlet in the axial direction is smaller than the diameter of the first circumferential surface; and / or, the diameter of the lower arc surface at the edge of the feeding channel near the feed inlet in the axial direction is smaller than the diameter of the second circumferential surface; along the axial direction of the feeding channel, as the distance between the lower arc surface and the feed inlet decreases, the diameter of the lower arc surface gradually decreases until it is equal to the diameter of the cylindrical hole.

13. The material guiding assembly as described in claim 7 or 8, characterized in that, The diameter of the cylindrical hole is greater than or equal to 1.9 mm and less than or equal to 2.6 mm; the length of the cylindrical hole along the axial direction of the inner wall surface of the reinforcing member is greater than or equal to 0.2 mm and less than or equal to 1.6 mm.

14. The material guiding assembly as claimed in claim 10, characterized in that, The diameter of the first circumferential surface is greater than the diameter of the second circumferential surface; the diameter of the first circumferential surface is greater than or equal to 4.88 mm and less than or equal to 7.32 mm; the diameter of the second circumferential surface is greater than or equal to 2.0 mm and less than or equal to 3.0 mm.

15. The material guiding assembly as claimed in claim 2, characterized in that, At least a portion of the active feeding wheel protrudes from the inner wall of the guide member, and the active feeding wheel is used to drive the wire material to be conveyed to the discharge port.

16. The material guiding assembly as claimed in claim 15, characterized in that, The inner wall surface of the reinforcing member has at least a portion forming a cylindrical hole or the inner wall surface of the reinforcing member has a minimum diameter position; along the axial direction of the feeding channel, the distance between the center of the active feeding wheel and the edge of the cylindrical hole away from the feed inlet is greater than or equal to 7.0 mm and less than or equal to 11.02 mm, or, along the axial direction of the feeding channel, the distance between the center of the active feeding wheel and the minimum diameter position of the inner wall surface of the reinforcing member is greater than or equal to 7.0 mm and less than or equal to 15 mm.

17. The material guiding assembly as claimed in claim 1, characterized in that, The material guiding assembly also has a transparent outer cover, and the material guiding assembly is disposed inside the outer cover. An indicator is also provided inside the outer cover. The indicator is disposed opposite to the material tray. The indicator and the material tray are disposed on opposite sides of the radial direction of the feed inlet. The indicator has a lamp bead and a ring-shaped or surface-shaped light guide. The main light-emitting surface of the light guide faces the axial direction of the feed inlet.

18. The material guiding assembly as claimed in claim 17, characterized in that, The material guiding assembly has a mounting part with a mounting plane facing the feed inlet. The material guiding element and the indicator element are mounted on the mounting plane. The projection distance of the line connecting the center of the light guiding part and the center of the feed inlet on the mounting plane is greater than or equal to 20 mm and less than or equal to 60 mm.

19. The material guiding assembly as claimed in claim 1, characterized in that, The reinforcing component is a ceramic component, and the material guide component is made of plastic.

20. A silo, characterized in that, The hopper is used for a 3D printing feeding device, and the hopper includes a housing and a material guiding component as described in any one of claims 1-19, wherein the material guiding component is installed in the housing.

21. A 3D printing feeding device, characterized in that, The 3D printing feeding device is used in a 3D printing system. The 3D printing feeding device includes a material tray and a hopper as described in claim 20. The material tray is installed in the hopper and is used to carry filament.

22. A 3D printing system, characterized in that, Includes a 3D printer and a 3D printing feed device as claimed in claim 21, wherein the 3D printing feed device provides filament to the 3D printer.

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