3D printing head mechanism

Abstract

The utility model relates to the technical field of 3D printers, and discloses a 3D printing head mechanism which comprises an assembly seat, an electromagnet is arranged on the assembly seat, and an assembly hole is formed in the electromagnet; the nozzle is arranged in the assembly hole in a penetrating manner, and the electromagnet adsorbs, fixes or releases the nozzle; the heat dissipation structure is arranged on the assembly base and dissipates heat of the nozzle; the heating structure is arranged on the assembly seat and is used for heating the nozzle; and the dismounting and mounting assembly is used for bearing and conveying the nozzles and drives the nozzles to enter or be separated from the assembling holes so as to assist the assembling assembly in replacing the nozzles. The nozzle has the technical effects that the nozzle does not need to be disassembled manually, and the safety and the convenience of disassembly, assembly and replacement operation of the nozzle are further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to 3D printer technical field, concretely relates to a 3D printing head mechanism. BACKGROUND

[0002] 3D printing is a new additive manufacturing technology, which is different from traditional subtractive or equal material processing manufacturing method. 3D printing is based on digital model file, uses powder metal or plastic and other adhesive materials, and forms a three-dimensional structure through layer-by-layer printing principle. Among them, FDM technology is one of the important technologies in the field of 3D printing.

[0003] The FDM printer mainly includes a printing head for printing materials. The printing head uses a hot melt material in the form of a filament as a printing material. The printing head includes a mounting seat and a nozzle. The nozzle is threadedly connected with the mounting seat. In the printing process, the nozzle is heated, and the solid filament-shaped thermoplastic material is fed into the nozzle and heated to a molten state in the nozzle. Under the control of a computer, the nozzle moves along a specific cross-sectional contour and a filling track and extrudes the molten printing material. The printing material solidifies when it is extruded and deposited, and a corresponding three-dimensional structure is obtained.

[0004] During use of the nozzle, the printing material is heated and melted to a semi-solid state in the nozzle. The temperature of the environment around the nozzle is lower than the temperature at which the printing material is heated and melted to be extruded. The printing material can easily solidify rapidly during the extrusion process, which can cause the nozzle to be blocked. In order to ensure the smoothness of printing, or to make the FDM printer suitable for printing various handicrafts, the nozzle needs to be frequently disassembled, cleaned or replaced. When disassembling the nozzle, the nozzle is in a high-temperature state due to the heating and melting of the printing material. The nozzle can be cooled to an appropriate temperature before disassembly. During the cooling process, the printing material can easily solidify in the nozzle. The solidified printing material can hinder the assembly and disassembly of the nozzle. Therefore, the nozzle usually needs to be disassembled at high temperature.

[0005] However, in the high-temperature state, the nozzle is difficult to disassemble from the mounting seat, which can easily cause burns and other safety accidents. The disassembly process of the nozzle has safety hazards and inconvenience. UTILITY MODEL CONTENTS

[0006] In order to solve the problems of the prior art, the utility model provides a 3D printing head mechanism. The nozzle is conveniently disassembled and assembled by an electromagnet and a disassembly and assembly component. The nozzle does not need to be manually disassembled, which is beneficial to improve the safety of use.

[0007] The technical effects achieved by the utility model are realized by the following technical aspects:

[0008] The utility model provides a 3D printing head mechanism, including assembly component, including assembly seat, be provided with electromagnet on the assembly seat, open assembly hole on the electromagnet, the nozzle is inserted in the assembly hole, the nozzle is fixed or released by the electromagnet, heat dissipation structure is located on the assembly seat, the heat dissipation structure radiates the heat of nozzle, heating structure is located on the assembly seat, the nozzle is heated by the heating structure, and dismounting component is used for carrying and conveying the nozzle, the dismounting component drives the nozzle to enter or separate the assembly hole, to assist the assembly component replacement nozzle.

[0009] In some implementations, the dismounting component includes a dismounting platform having a placement hole for insertion of the nozzle, the dismounting platform positions and locates the nozzle in the placement hole; and a lifting drive member in driving connection with the dismounting platform, the lifting drive member drives the dismounting platform.

[0010] In some implementations, the assembly seat is provided with a height detection member for detecting the distance between the assembly seat and the dismounting platform.

[0011] In some implementations, the heating structure includes a heating seat in detachable connection with the assembly seat, the heating seat has a heating hole and a heat conduction hole, the nozzle is inserted into the heat conduction hole; and a heating member inserted into the heating hole, the heating member is detachably connected with the heating seat in the heating hole.

[0012] In some implementations, a step is provided on the outer wall of the nozzle, the step cooperates with the heating seat to limit the installation depth of the nozzle inserted into the heat conduction hole.

[0013] In some implementations, the heating seat has a mounting hole, and a temperature detection member is inserted into the mounting hole.

[0014] In some implementations, the heat dissipation structure includes a heat dissipation seat in detachable connection with the assembly seat, the heat dissipation seat has a heat dissipation hole, the nozzle sequentially penetrates the heat dissipation hole and the heating hole; a connecting member between the heat dissipation seat and the heating seat; and a heat dissipation fin on the heat dissipation seat.

[0015] In some implementations, the heating seat has a connecting hole, the connecting member includes a connecting column, the connecting column is provided on the heat dissipation seat and is clamped with the heating seat in the connecting hole.

[0016] In some implementations, one side of the heat dissipation seat is provided with an assembly plate, the assembly plate abuts against the electromagnet on the heat dissipation seat, and the assembly plate is detachably connected with the heat dissipation seat.

[0017] In some implementations, one side of the assembly seat is provided with a disassembly area for disassembling the nozzle, the disassembly assembly is arranged in the disassembly area, and the assembly seat is drivingly connected with an assembly driving assembly for driving the assembly seat to enter or leave the disassembly area.

[0018] In summary, the utility model has at least the following advantages:

[0019] The 3D printing head mechanism provided by the utility model, the nozzle is fixed in the assembly hole by electromagnetic attraction, the printing material is put into the nozzle, the heating structure heats the nozzle to melt the printing material in the nozzle, the heat dissipation structure dissipates heat from the nozzle to form a temperature gradient required for melting the printing material in the nozzle, and the nozzle extrudes the printing material to realize 3D printing.

[0020] When the nozzle needs to be replaced, the disassembly assembly moves to one side of the assembly seat, the electromagnet is briefly powered on and demagnetized, the attraction of the electromagnet to the nozzle disappears and the nozzle is released, the disassembly assembly supports the nozzle and drives the nozzle to separate from the assembly hole, and the nozzle can be disassembled without human contact in a high-temperature environment. When a new nozzle is installed, the disassembly assembly conveys the new nozzle to one side of the assembly seat and drives the new nozzle to penetrate into the assembly hole, the electromagnet attracts the nozzle, and the nozzle is quickly installed. By controlling the on-off of the current of the electromagnet and the support of the disassembly assembly to the disassembled nozzle and the conveying of the to-be-installed nozzle, the 3D printing head mechanism replaces the traditional manual disassembly and installation of the nozzle, can improve the safety of nozzle disassembly and replacement operation, and the nozzle disassembly process is accurate and fast, which is beneficial to solving the problem of high-temperature operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of a 3D printing head mechanism according to an embodiment of the utility model.

[0022] Figure 2 FIG. 4 is a structural schematic view of an electromagnet according to an embodiment of the utility model.

[0023] Figure 3 FIG. 6 is a partial structural schematic view of a disassembly assembly according to an embodiment of the utility model.

[0024] Figure 4 FIG. 8 is a structural schematic view of a height detection member according to an embodiment of the utility model.

[0025] Figure 5 FIG. 10 is a whole structural schematic view of a 3D printing head mechanism according to an embodiment of the utility model.

[0026] Figure 6 FIG. 12 is a structural schematic view of a heating structure and a heat dissipation structure according to an embodiment of the utility model.

[0027] Figure 7 Structure diagram of the heat seat of the embodiment of the utility model.

[0028] Figure 8 Structure diagram of the heat seat of the embodiment of the utility model.

[0029] Figure 9 Structure diagram of the connecting piece of the embodiment of the utility model.

[0030] Markings in the drawing:

[0031] 1, assembly component; 11, assembly seat; 12, electromagnet; 121, assembly hole; 15, height detection piece; 16, assembly plate; 161, alignment hole; 17, assembly drive assembly; 171, X-axis drive piece; 172, Y-axis drive piece; 173, transmission plate;

[0032] 2, nozzle; 21, step;

[0033] 3, heat dissipation structure; 31, heat seat; 311, heat dissipation hole; 32, connecting piece; 33, heat dissipation fin; 34, terminal board;

[0034] 4, heating structure; 41, heat seat; 411, heating hole; 412, heat conduction hole; 413, protruding ring; 414, mounting hole; 415, connecting hole; 42, heating piece; 43, temperature detection piece;

[0035] 5, disassembly assembly; 51, disassembly platform; 511, installation hole; 52, lifting drive piece;

[0036] 6, disassembly area. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely below by combining the drawings in the embodiment of the utility model. The described embodiment is a part of the embodiments of the utility model, rather than all the embodiments.

[0038] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0039] Example 1:

[0040] Please refer to the drawings Figure 1 and Figure 2The 3D printing head mechanism can be suitable for various 3D printing devices which need to replace nozzles under high temperature conditions, the dismounting operation of the nozzle 2 is quick and safe, and high-temperature contactless dismounting of the nozzle 2 can be realized.

[0041] The 3D printing head mechanism comprises an assembly component 1, the assembly component 1 comprises an assembly seat 11, the assembly seat 11 is provided with an electromagnet 12, specifically, the electromagnet 12 preferably but not limitedly uses a low-voltage direct-current loss electromagnet 12, the magnetic force of the electromagnet 12 is controlled by controlling the power-on and power-off of the electromagnet 12, and the safety in use is beneficial to be ensured. The assembly hole 121 is formed through the electromagnet 12, the nozzle 2 is arranged in the assembly hole 121, and the nozzle 2 is adsorbed and fixed or released by controlling the power-on and power-off of the electromagnet 12. In some specific embodiments, the nozzle 2 is a straight pipe, the hole diameter of the assembly hole 121 is greater than the pipe diameter of the nozzle 2, the nozzle 2 is beneficial to be smoothly dismounted at the assembly hole 121, and meanwhile, the nozzle 2 is specifically a metal nozzle 2, so that the electromagnet 12 has strong adsorption force on the nozzle 2.

[0042] The assembly seat 11 is provided with a heat dissipation structure 3 and a heating structure 4, specifically, the heat dissipation structure 3 and the heating structure 4 are located outside the nozzle 2, the heating structure 4 heats the nozzle 2 to make the nozzle 2 in a high-temperature state, and then heats the printing material in the nozzle 2, and the heat dissipation structure 3 can dissipate heat when the nozzle 2 is overheated, so that the temperature gradient required for the printing material to melt is formed in the nozzle 2, and the occurrence of overheating is reduced.

[0043] One side of the assembly seat 11 is provided with a dismounting assembly 5, the dismounting assembly 5 bears and conveys the nozzle 2, and the dismounting assembly 5 can drive the nozzle 2 to enter or separate from the assembly hole 121, so as to assist the assembly component 1 in replacing the nozzle 2.

[0044] When the 3D printing head mechanism performs 3D printing, the solid filament printing material is put into the nozzle 2, the heating structure 4 heats the printing material, the heat dissipation structure 3 dissipates heat of the nozzle 2, the molten printing material is extruded from the nozzle 2, the assembly seat 11 drives the nozzle 2 to move up and down along the Z-axis direction, the printing material is accumulated layer by layer, each layer of material is quickly cooled and solidified to form a cross section, the nozzle 2 is lowered by a single-layer height and performs single-layer printing, and a three-dimensional structure is formed.

[0045] When the nozzle 2 needs to be disassembled and cleaned for long-term use, or the 3D printing head mechanism needs to be replaced with different size and diameter of filament printing material and different caliber of nozzle 2 according to different molding requirements to ensure the precision of 3D printing, the disassembly assembly 5 moves to one side of the assembly seat 11, the electromagnet 12 is temporarily powered on, the electromagnet 12 is demagnetized, the nozzle 2 loses the attraction force and is supported by the disassembly assembly 5 and separated from the assembly hole 121. The outer wall of the conventional nozzle is provided with threads, and the mounting seat is threadedly connected with the nozzle. Compared with the conventional nozzle, the risk of high-temperature scalding caused by manual disassembly of the nozzle 2 under high temperature can be reduced, the nozzle 2 can be disassembled without contact under high temperature, and the operator does not need to wear gloves for disassembly operation, so that the nozzle 2 is simple and convenient to disassemble.

[0046] When the nozzle 2 is replaced and installed, the assembly assembly 1 carries the nozzle 2 to be installed and transmits the nozzle 2 to one side of the assembly seat 11, the assembly assembly 1 drives the nozzle 2 to be installed to penetrate into the assembly hole 121, the electromagnet 12 adsorbs and fixes the nozzle 2, and the nozzle 2 is automatically assembled.

[0047] Embodiment 2:

[0048] The difference between this embodiment and embodiment 1 is that the assembly assembly 1 and the disassembly assembly 5 of the utility model are further optimized in structure in this embodiment, please see Figures 3 to 5 .

[0049] Please see Figure 3 , the disassembly assembly 5 of this embodiment comprises a disassembly platform 51, the disassembly platform 51 is provided with a mounting hole 511 for inserting the nozzle 2, and the disassembly platform 51 is arranged and positioned in the mounting hole 414. The disassembly platform 51 is drivingly connected with a lifting driving part 52, specifically, the lifting driving part 52 preferably but not limited to adopts a lifting linear module, the slider of the lifting linear module is drivingly connected with the disassembly platform 51, and the disassembly platform 51 can be driven to move up and down along the Z-axis direction to approach or move away from the assembly seat 11.

[0050] Please see Figure 4 , in the preferred embodiment, the assembly seat 11 is provided with a height detection part 15, specifically, the height detection part 15 preferably but not limited to adopts a displacement sensor, the height detection part 15 can be used for height compensation when the nozzle 2 is printing, and can be used for detecting the movement height of the disassembly platform 51 when the nozzle 2 is disassembled, the movement distance of the disassembly platform 51 is detected to position the disassembly platform 51 to an appropriate height, so that the nozzle 2 disassembly program is automatically completed.

[0051] When the nozzle 2 is disassembled, the lifting driving member 52 drives the disassembling platform 51 to ascend to the bottom of the assembly seat 11, the disassembling platform 51 moves to the state that the nozzle 2 is inserted into the placement hole 511, the electromagnet 12 is connected to the rated direct current voltage to achieve demagnetization effect, the nozzle 2 loses the adsorption effect of the electromagnet 12 and is inserted and placed in the placement hole 511, the lifting driving member 52 drives the disassembling platform 51 to descend to be away from the assembly seat 11, and the nozzle 2 is disassembled.

[0052] When the nozzle 2 is assembled, the disassembling platform 51 bears the nozzle 2 to be assembled, the nozzle 2 to be assembled is placed in the placement hole 511, the lifting driving member 52 drives the disassembling platform 51 to move to the bottom of the assembly seat 11 again, in the ascending process of the disassembling platform 51, the nozzle 2 penetrates into the assembly hole 121, the lifting driving member 52 stops running, the electromagnet 12 adsorbs the nozzle 2, and the nozzle 2 is assembled, which is convenient to operate.

[0053] Please refer to Figure 5 In the preferred embodiment, one side of the assembly seat 11 is provided with a disassembling area 6 for disassembling the nozzle 2, the disassembling assembly 5 is arranged in the disassembling area 6, and the assembly seat 11 is drivingly connected with an assembly driving assembly 17 for driving the assembly seat 11 to enter or leave the disassembling area 6.

[0054] In some specific embodiments, the assembly driving assembly 17 comprises an X-axis driving member 171, which is drivingly connected with the assembly seat 11. Specifically, the X-axis driving member 171 preferably but not limitedly adopts an X-axis linear module, the slider of the X-axis linear module is drivingly connected with the assembly seat 11, and the X-axis driving member 171 drives the assembly seat 11 to move along the X-axis direction. One side of the X-axis driving member 171 is provided with a transmission plate 173, the transmission plate 173 is drivingly connected with a Y-axis driving member 172. Specifically, the Y-axis driving member 172 preferably but not limitedly adopts a Y-axis linear module, and the Y-axis linear module can be provided with two Y-axis linear modules to be respectively drivingly connected with two ends of the transmission plate 173. The Y-axis driving member 172 drives the transmission plate 173 to move along the Y-axis direction, and then the transmission plate 173 drives the X-axis driving member 171 and the assembly seat 11 to move and adjust.

[0055] When the nozzle 2 needs to be disassembled and assembled, the assembly driving assembly 17 drives the assembly seat 11 to move into the disassembly and assembly area 6 and above the disassembly and assembly platform 51 which is in the disassembly and assembly area 6 and performs lifting movement, which is conducive to the quick and accurate alignment of the disassembly and assembly platform 51 and the assembly hole 121 of the electromagnet 12, and at the same time, the flexible movement of the assembly driving assembly 17 drives the assembly seat 11, so that the nozzle 2 can be flexibly printed along the set trajectory. Further, a blockage detection system can be provided at the assembly assembly 1, and when the nozzle 2 is found to be blocked by printing material, the nozzle 2 can be automatically replaced by controlling the movement of the assembly driving assembly 17 and the disassembly and assembly assembly 5, and the replaced nozzle 2 can be printed continuously at the breakpoint, which is convenient to operate, so as to solve the problem that the nozzle 2 stops running and affects the printing progress due to long-time non-intervention when the nozzle 2 is blocked. The way of detecting the blockage of the nozzle 2 by the blockage detection system is known to those skilled in the art and can be realized, and is not described in detail in this embodiment.

[0056] In some specific embodiments, the plurality of installation holes 511 are spaced apart and distributed on the disassembly and assembly platform 51 along the X-axis direction, the disassembly and assembly platform 51 can carry a plurality of nozzles 2, which is conducive to the installation of new nozzles 2 after the disassembly of the nozzles 2 to be cleaned, and is conducive to saving the nozzle replacement time, thereby improving the 3D printing efficiency.

[0057] Embodiment 3:

[0058] The difference between this embodiment and the above-mentioned embodiments is that the heat dissipation structure 3 and the heating structure 4 of the present utility model are further optimized in structure, please refer to Figures 6 to 9 .

[0059] Please refer to Figure 6 and Figure 7 , the heating structure 4 of the present embodiment comprises a heating seat 41, which is arranged on the assembly seat 11 and detachably connected with the assembly seat 11, and the heating seat 41 is provided with a heating hole 411 and a heat conduction hole 412, wherein the nozzle 2 is arranged in the heat conduction hole 412, and in some specific embodiments, the heat conduction hole 412 is matched with the nozzle 2, and the inner wall of the heat conduction hole 412 is in close contact with the nozzle 2, which can increase the contact area between the nozzle 2 and the heating seat 41, thereby improving the heat conduction efficiency and reducing the heat loss.

[0060] A heating element 42 is arranged in the heating hole 411 of the heating seat 41, and specifically, the heating element 42 is preferably but not limited to a heating rod, which generates heat to heat the heating seat 41, and the heating seat 41 conducts heat to the nozzle 2. The heating element 42 is detachably connected with the heating seat 41 in the heating hole 411, and specifically, the heating element 42 can be fixed in the heating hole 411 by screws, which is conducive to the maintenance and replacement of the heating element 42.

[0061] In some specific embodiments, the bottom of the heating seat 41 is provided with a protruding ring 413 at the opening of the heat-conducting hole 412. The protruding ring 413 can be a circular ring protruding outward from the surface of the heating seat 41. The outer wall of the nozzle 2 is provided with a step 21. When the nozzle 2 is fixed in the heat-conducting hole 412, the protruding ring 413 cooperates with the step 21 to limit the depth of the nozzle 2 penetrating into the heat-conducting hole 412, so that the nozzle 2 is positioned to the correct installation position. The step 21 is arranged to achieve accurate and rapid positioning of the nozzle 2 during installation.

[0062] In other specific embodiments, the heating seat 41 is provided with a mounting hole 414. The heating seat 41 is provided with a temperature detection member 43 in the mounting hole 414. Specifically, the temperature detection member 43 preferably but not limited to a temperature sensor. The temperature detection member 43 detects the temperature at the heating seat 41, so as to control the temperature at the heating seat 41.

[0063] Please refer to Figure 8 In preferred embodiments, the heat dissipation structure 3 includes a heat dissipation seat 31 located between the heating seat 41 and the electromagnet 12 and detachably connected with the assembly seat 11. Specifically, the heating seat 41 can be detachably connected with the assembly seat 11 through bolts, which is convenient to disassemble and assemble. The heat dissipation seat 31 is provided with a heat dissipation hole 311. Specifically, the heat dissipation hole 311 can be matched with the nozzle 2, that is, the inner wall of the heat dissipation hole 311 is in close contact with the outer wall of the nozzle 2, so as to ensure the contact area between the heat dissipation seat 31 and the nozzle 2, and achieve good heat dissipation result.

[0064] Please refer to Figures 6 to 8 The nozzle 2 penetrates through the assembly hole 121, the heat dissipation hole 311 and the heating hole 411 to achieve assembly and fixation. Compared with the conventional nozzle, the outer wall of the nozzle 2 is not threaded, which can smoothly pass through the heat dissipation hole 311 and the heating hole 411 during disassembly and assembly, which is conducive to the close cooperation of the nozzle 2, the heat dissipation seat 31 and the heating seat 41, so as to achieve accurate control of the temperature of the nozzle 2. The inside of the nozzle 2 forms a suitable temperature gradient, that is, the temperature in the nozzle 2 can reach a set value to melt the printing material, reduce the repeated melting and solidification of the printing material when the nozzle 2 is printing and stopping printing, and cause the printing material to solidify and block the nozzle 2, so as to ensure the smooth extrusion of the nozzle 2 and improve the printing precision and the forming quality of the finished product. At the same time, the nozzle 2 is independent of the heating structure 4 and the heat dissipation structure 3, and during the disassembly and assembly of the nozzle 2, the installation and disassembly of the circuit are not involved, which can reduce the line failure rate caused by repeated disassembly and assembly of the nozzle 2.

[0065] The heat dissipation seat 31 is provided with heat dissipation fins 33. Specifically, the heat dissipation fins 33 can be provided with a plurality of heat dissipation fins 33. The heat dissipation seat 31 increases the heat dissipation effect through the heat dissipation fins 33, and reduces the safety problem caused by overheating.

[0066] Please refer to Figure 9A connecting piece 32 is arranged between the heat dissipation base 31 and the heating base 41, in some specific embodiments, a connecting hole 415 is formed in the heating base 41, the connecting piece 32 comprises a connecting column arranged on the heat dissipation base 31 and clamped with the heating base 41 in the connecting hole 415, the heat dissipation base 31 is clamped with the heating base 41 through the connecting column, and the structure is simple and easy to assemble, and daily maintenance is facilitated.

[0067] In preferred embodiments, the heat dissipation base 31 is provided with an assembly plate 16 on one side, specifically, the assembly plate 16 is located on the side of the heat dissipation base 31 away from the heating base 41, the assembly plate 16 abuts against the electromagnet 12 on the heat dissipation base 31, the electromagnet 12 and the heat dissipation base 31 are kept in the state of mutual abutment, the electromagnet 12 and the heat dissipation base 31 are compact in structure, the end of the nozzle 2 is sequentially inserted into the assembly hole 121 through the heat-conducting hole 412 and the heat dissipation hole 311, and installation and positioning are convenient.

[0068] Please refer to Figure 8 In other specific embodiments, the heat dissipation base 31 is provided with a terminal plate 34, the terminal plate 34 is detachably connected with the heat dissipation base 31, the heating piece 42, the temperature detection piece 43 and the output line of the electromagnet 12 can be concentratedly connected to the terminal plate 34, when the nozzle 2 is disassembled, the cable does not need to be disassembled, and the safety and convenience of disassembly and assembly are improved.

[0069] In the utility model, unless another definite provision and limitation, the terms "installation", "connection", "connection", "fixing" and the like terms should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or be integrated, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.

[0070] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, or is the orientation or position relation commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0071] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0072] In the utility model, unless otherwise explicitly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature therebetween. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0073] Although the description of the utility model is combined with the above specific embodiments, it is obvious that persons skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A 3D printing head mechanism, characterized by, The assembly component (1) comprises an assembly seat (11) provided with an electromagnet (12) having an assembly hole (121) formed therein; The nozzle (2) is arranged in the assembly hole (121), and the electromagnet (12) is used for adsorbing and fixing or releasing the nozzle (2); The heat dissipation structure (3) is arranged on the assembly seat (11) and is used for dissipating heat of the nozzle (2); The heating structure (4) is arranged on the assembly seat (11) and is used for heating the nozzle (2); and The disassembly and assembly component (5) is used for carrying and conveying the nozzle (2), and is used for driving the nozzle (2) to enter or leave the assembly hole (121) to assist the assembly component (1) in replacing the nozzle (2). The disassembly and assembly component (5) comprises The disassembly and assembly platform (51) is provided with a placement hole (511) for inserting the nozzle (2), and is used for placing and positioning the nozzle (2) in the placement hole (511); and 2. The 3D printing head mechanism of claim 1, wherein, The lifting driving member (52) is in transmission connection with the disassembly and assembly platform (51), and is used for driving the disassembly and assembly platform (51). The assembly seat (11) is provided with a height detection member (15) used for detecting a distance between the assembly seat (11) and the disassembly and assembly platform (51). The heating structure (4) comprises 3. The 3D printing head mechanism of claim 2, wherein, The heating seat (41) is detachably connected with the assembly seat (11), and is provided with a heating hole (411) and a heat conduction hole (412), and the nozzle (2) is arranged in the heat conduction hole (412); and 4. The 3D printing head mechanism of claim 1, wherein, The heating member (42) is arranged in the heating hole (411) and is detachably connected with the heating seat (41) in the heating hole (411). The nozzle (2) is provided with a step (21) on an outer wall, and the step (21) is used for limiting an installation depth of the nozzle (2) penetrating into the heat conduction hole (412) in cooperation with the heating seat (41). The heating seat (41) is provided with a mounting hole (414), and a temperature detection member (43) is arranged in the mounting hole (414).

5. The 3D printing head mechanism of claim 4, wherein, The heat dissipation structure (3) comprises 6. The 3D printing head mechanism of claim 4, wherein, The heat dissipation seat (31) is detachably connected with the assembly seat (11), and is provided with a heat dissipation hole (311), and the nozzle (2) sequentially penetrates through the heat dissipation hole (311) and the heating hole (411); 7. The 3D printing head mechanism of claim 4, wherein, The connecting member (32) is arranged between the heat dissipation seat (31) and the heating seat (41); and The heat dissipation fin (33) is arranged on the heat dissipation seat (31). The heating seat (41) is provided with a connecting hole (415), and the connecting member (32) comprises a connecting column arranged on the heat dissipation seat (31) and in the connecting hole (415) and in clamping connection with the heating seat (41). ​ ​ 8. The 3D printing head mechanism of claim 7, wherein, ​ 9. The 3D printing head mechanism of claim 7, wherein, One side of the heat sink (31) is provided with an assembly plate (16) which abuts against the electromagnet (12) on the heat sink (31), and the assembly plate (16) is detachably connected with the heat sink (31).

10. The 3D printing head mechanism of claim 1, wherein, One side of the assembly seat (11) is provided with a dismounting area (6) for dismounting the nozzle (2), the dismounting assembly (5) is arranged in the dismounting area (6), and the assembly seat (11) is drivingly connected with an assembly driving assembly (17) for driving the assembly seat (11) to enter or leave the dismounting area (6).

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