3D special printing equipment

Abstract

The invention provides 3D special printing equipment which comprises a workbench, a supporting and placing plate, a mounting assembly, a connecting assembly, material scrolls, a printing head and a spray head. According to the 3D special printing equipment provided by the invention, the mounting assembly is arranged, so that the number of the placed material scrolls can be flexibly increased, and a movable assembly slides in the assembly, so that the material scrolls can be more stably placed; the overall length of the mounting assembly is flexibly changed to adapt to increase of scroll supporting pieces, the material scroll is placed in the assembling body and the movable assembling body, infection of water molecules and dust in air to the material scroll is greatly reduced, the material scroll is placed more safely and stably, meanwhile, through splicing and assembling of the scroll supporting pieces, the material scroll supporting pieces can be assembled more stably, and the material scroll supporting pieces can be assembled more stably. The material wire disc can be independently replaced conveniently, quick mounting and dismounting of the mounting assembly are achieved through clamping connection of the clamping connection piece and the mounting plate, the mounting assembly can be operated at will conveniently, and the mounting convenience of the mounting assembly is improved.

Description

Technical Field

[0001] The present invention relates to the field related to 3D printing, and in particular to a 3D special printing device. Background Art

[0002] 3D special printing is a rapid prototyping technology that uses digital model files as the basis and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. It is usually used to make models in mold manufacturing, industrial design and other fields. Recently, it has been widely used in the direct manufacturing of products and has applications in jewelry, construction, automobiles, aerospace, and medical industries.

[0003] For example, the Chinese patent with patent number CN201310717099.2 discloses a 3D printing device, which keeps the softened printing material warm by intermittent operation of the heating element or continuous operation at a lower temperature, so that the softened printing material will not harden in the feed pipe due to the drop in temperature and block the feed pipe, thus achieving an anti-blocking effect;

[0004] For example, the Chinese patent with patent number CN201910360464.6 discloses "A 3D special printing device and printing method". The material is heated and melted by a heating mechanism, and the heating power is controlled according to the printing speed under the action of a temperature controller. At the same time, the flow control valve controls the speed at which the material enters the printing nozzle from the discharge pipe. By controlling the heating rate and feeding speed, the on-demand supply of molten 3D printing material is achieved. There is no need for a two-stage insulation device, which avoids the problem of clogging of the feed port and nozzle of the discharge pipe and reduces the waste of heating energy.

[0005] The current 3D printing equipment melts the low-melting-point filamentary material into liquid through the extrusion head of the heater, and extrude the molten thermoplastic material filament through the nozzle. During this printing process, the filament reel is exposed, and the more sensitive consumables are easily affected by water molecules and dust in the environment, causing damage and deterioration of the consumables, affecting their use. When printing with multiple consumables, a wire rack is generally used to place and support the multiple consumables in order. After a certain consumable is used up first, it needs to be taken out and replaced separately. The taking-out process is more troublesome. When the number of consumables required increases, the placement of multiple sets of filament reels requires flexible replacement of wire racks of different sizes, which is troublesome to operate. When replacing or adding wire racks, it is necessary to re-drill holes and install bolts, which is more troublesome. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a 3D special printing device.

[0007] Based on this, the present invention proposes a 3D special printing device, including a workbench, a support placement plate, a mounting component, a connecting component, a material filament reel, a print head, and a nozzle;

[0008] A supporting plate is installed on the top of the workbench;

[0009] One end of the mounting assembly is locked and fixed to the connecting assembly, and the connecting assembly is installed on the frame of the 3D special printing device;

[0010] The material filament reel is movably installed inside the mounting assembly, and one end of the material filament reel is connected to the print head, and a nozzle is installed at the bottom end of the print head;

[0011] The mounting assembly comprises an assembly, a positioning plate, a positioning rail, a movable assembly, a left support bracket, a wire reel support, a right support bracket, a movable limiting rod, a cover plate, a wire outlet structure, and an adjusting cover plate; the left end of the assembly is bolted to a connecting assembly, the left end of the positioning plate is fixed to the assembly, the bottom end of the positioning rail is fixed to the assembly, the left end of the movable assembly is clamped with the assembly, the left support bracket is respectively connected to the positioning plate and the positioning rail, the left end of the wire reel support is threadedly connected to the left support bracket, the right support bracket is placed inside the movable assembly, the inside of the right support bracket is movable with a movable limiting rod, the left end of the movable limiting rod is threadedly connected to the wire reel support, the bottom of the cover plate is installed with a wire outlet structure, the left end of the adjusting cover plate slides inside the cover plate, and the cover plate and the adjusting cover plate are respectively embedded downwardly in the top of the assembly and the movable assembly.

[0012] Optionally, the wire reel support includes a support rod, a fixed ring, a movable ring, a threaded connection groove, a guide rod, a threaded positioning block, and an auxiliary rod. A fixed ring is fixed to the left end surface of the support rod, the inner side of the movable ring is threadedly connected to the support rod, a threaded connection groove is provided at the right end of the support rod, the right end of the guide rod is fixed to the support rod, the threaded positioning block is movable on the outside of the guide rod, and an auxiliary rod is fixed to the top end thereof.

[0013] Optionally, the movable assembly includes an outer cover, a sliding plate, and a rubber clip strip, the sliding plate is fixed to the left end of the outer cover, the rubber clip strip is fixed to the top of the sliding plate, the top of the rubber clip strip is clipped to the assembly, and an adjustment cover is embedded in the top of the outer cover.

[0014] Optionally, the connecting assembly includes a support frame, a connecting plate, a clamping member, a motor, a screw, a slide seat, and a mounting plate. The right end of the support frame is fixed with a connecting plate, the left end of the clamping member is fixed to the connecting plate, the motor is installed at the left end of the support frame, and the right end of the motor is connected to the screw through a coupling, the inner side of the slide seat is threadedly connected to the screw, and it slides on the left end of the clamping member, the right end of the mounting plate is fixed to the left end of the assembly by bolts, and the left end of the motor is clamped to the clamping member.

[0015] Optionally, the clamping component includes a base, a connecting rod, a limiting rod, a spring, and a movable clamping block. A connecting rod is fixed to the left end of the base, the left end of the connecting rod is fixed to the connecting plate, a limiting rod is fixed inside the right end of the base, the bottom end of the spring is fixed to the base, and the movable clamping block is elastically connected to the base by a spring.

[0016] Optionally, a positioning groove is provided at the right end of the left supporting bracket, and a threaded positioning block is threadedly connected to the positioning groove to facilitate threaded installation of the wire reel support on the left supporting bracket.

[0017] Optionally, the distribution spacing of the multiple groups of wire outlet structures and rubber clamping strips is the same as the length of the wire reel support. When the number of wire reel support members is increased, the outer cover can be moved outward so that the moving distance of the outer cover is affected by the rubber clamping strips to form a fixed-space movement, and the moving spacing of the wire outlet structures and rubber clamping strips is the same as the length of the wire reel support, so that after the movement, the wire outlet structure in the middle of the adjustment cover plate still coincides with the wire outlet structure on the cover plate.

[0018] Optionally, a card slot with a "T"-shaped cross-section is provided inside the left end of the mounting plate to facilitate snap-in connection with the connector, thereby achieving a quick and stable connection and facilitating quick installation of the mounting assembly on the 3D special printing device through the connecting assembly.

[0019] Optionally, the slide seat has a "cross" shape and contacts with multiple groups of movable snap-in blocks, so that the slide seat can be moved and embedded in the interior of the snap-in component, and through the continuous movement of the slide seat, the group of movable snap-in blocks are pushed to move outward synchronously and snap into the "T"-shaped slot of the mounting plate to form a snap connection.

[0020] Optionally, a positioning plate and a positioning rail are also fixed inside the outer cover to facilitate the positioning of the right support bracket.

[0021] Optionally, the wire-out structure 310 includes a receiving plate 3101, a guide seat 3102, a servo motor 3103, a conveying wheel 1 3104, a swing block 3105, a tension spring 3106, and a conveying wheel 2 3107. The receiving plate 3101 is installed at the bottom of the cover plate 39, and a guide seat 3102 is provided on the top of the receiving plate 3101. The receiving plate 3101 is bolted to the rear end of the servo motor 3103, and the output end of the servo motor 3103 is transmission-connected to the conveying wheel 1 3104. The swing block 3105 is rotationally connected to the upper right end of the receiving plate 3101, the left end of the tension spring 3106 is fixed to the receiving plate 3101, and the right end of the tension spring 3106 is fixed to the swing block 3105. The swing block 3105 is rotationally connected to the middle part of the conveying wheel 2 3107.

[0022] The present invention has the following advantages: The present invention provides a 3D special printing device through improvement, which has the following improvements compared with the same type of devices:

[0023] Advantage 1: The present invention provides a 3D special printing equipment. By setting up an installation component, the number of material wire reels can be flexibly increased, and the overall length of the installation component can be flexibly changed by sliding the movable assembly inside the assembly to adapt to the increase of wire reel supports. By placing the material wire reel inside the assembly and the movable assembly, the contamination of the material wire reel by water molecules and dust in the air is greatly reduced, making the placement of the material wire reel safer and more stable. At the same time, through the splicing and assembly of the wire reel supports, the material wire reel can be easily replaced individually, with strong flexibility.

[0024] Advantage 2: The present invention provides a 3D special printing device, which facilitates the maintenance and installation of the installation component by setting a connecting component. By fixing the support frame bolts on the frame of the 3D printing device and using the clamping parts and the mounting plate to clamp the installation component, the installation component can be quickly installed and disassembled, which facilitates arbitrary operation of the installation component and improves the convenience of installing the installation component on the frame of the 3D printing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the installation assembly of the present invention;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the installation assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the movable assembly and the adjustment cover plate of the present invention;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the wire disc support member of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the wire disc support member of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the enlarged structure of the connection assembly details of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the clamping member of the present invention;

[0034] Fig.10 It is a schematic diagram of the internal structure of the wire-out structure of the present invention.

[0035] Explanation of the reference numerals: workbench 1, support plate 2, mounting assembly 3, connection assembly 4, material filament reel 5, print head 6, nozzle 7, assembly 31, positioning plate 32, positioning track 33, movable assembly 34, left support bracket 35, filament reel support 36, right support bracket 37, movable limit rod 38, cover plate 39, wire outlet structure 310, adjustment cover plate 311, support rod 361, fixing ring 362, movable ring 363, threaded connection groove 364, guide rod 365, threaded positioning block -366, auxiliary rod-367, outer cover-341, sliding plate-342, rubber clamping strip-343, support frame-41, connecting plate-42, clamping piece-43, motor-44, screw rod-45, slide seat-46, mounting plate-47, base-431, connecting rod-432, limiting rod-433, spring-434, movable clamping block-435, receiving plate-3101, guide seat-3102, servo motor-3103, conveying wheel one-3104, swing block-3105, tension spring-3106, conveying wheel two-3107. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Please refer to Figure 1-Figure 4, the present embodiment provides a 3D special printing device, including a workbench 1, a support and placement plate 2, a mounting component 3, a connecting component 4, a material wire reel 5, a print head 6, and a nozzle 7; a support and placement plate 2 is installed on the top of the workbench 1; one end of the mounting component 3 is locked and fixed with the connecting component 4, and the connecting component 4 is installed on the frame of the 3D special printing device; the material wire reel 5 is movably installed inside the mounting component 3, and one end of it is connected to the print head 6, and the bottom end of the print head 6 is installed with the nozzle 7; the mounting component 3 includes an assembly 31, a positioning plate 32, a positioning rail 33, a movable assembly 34, a left support bracket 35, a wire reel support 36, a right support bracket 37, a movable limiting rod 38, a cover plate 39, a wire outlet structure 310, and an adjustment cover plate 311; the left end of the assembly 31 is bolted with the connecting component 4, the left end of the positioning plate 32 is fixed to the assembly 31, and the bottom of the positioning rail 33 is fixed to the bottom of the positioning rail 33. The left end of the movable assembly 34 is fixed to the assembly 31, the left end of the movable assembly 34 is clamped with the assembly 31, the left support bracket 35 is connected to the positioning plate 32 and the positioning rail 33 respectively, the left end of the wire reel support 36 is threadedly connected to the left support bracket 35, the right support bracket 37 is placed inside the movable assembly 34, and the inside of the right support bracket 37 is movable with a movable limiting rod 38, the left end of the movable limiting rod 38 is threadedly connected to the wire reel support 36, the bottom of the cover plate 39 is installed with a wire outlet structure 310, the left end of the adjustment cover plate 311 slides inside the cover plate 39, the cover plate 39 and the adjustment cover plate 311 are respectively embedded downwardly in the top of the assembly 31 and the movable assembly 34, a linear module can be added to the print head 6, and the print head 6 is driven to move by the linear module, and a mechanical arm can also be added to the print head 6, and the print head 6 is driven to move to a suitable position by the mechanical arm, which will not be repeated here.

[0038] In some embodiments, the movable assembly 34 includes an outer cover 341, a sliding plate 342, and a rubber snap-in strip 343. The left end of the outer cover 341 is fixed with a sliding plate 342, and the top of the sliding plate 342 is fixed with a rubber snap-in strip 343. The top of the rubber snap-in strip 343 is snap-fitted with the assembly 31. The top of the outer cover 341 is embedded with an adjustment cover 311. The inner part of the outer cover 341 is also fixed with a positioning plate 32 and a positioning track 33, which is convenient for positioning the right support 37. Desiccant can be placed inside the movable assembly 34 and the assembly 31 to dry the internal air and avoid moisture. The print head 6 is a common 3D printing nozzle, which uses the printer nozzle to spray a very thin layer of liquid plastic material on the mold tray, and the coating is then placed under ultraviolet light for treatment. After that, the mold tray drops a very small distance for the next layer to be stacked up.

[0039] In some embodiments, a positioning groove is provided at the right end of the left support bracket 35, and a threaded positioning block 366 is threadedly connected to the positioning groove to facilitate threaded installation of the wire reel support 36 on the left support bracket 35. The distribution spacing of multiple groups of wire outlet structures 310 and rubber clamping strips 343 is the same as the length of the wire reel support 36. When the number of wire reel supports 36 is increased, the outer cover 341 can be moved outward so that the moving distance of the outer cover 341 is affected by the rubber clamping strip 343 to form a fixed spacing movement, and the moving spacing of the wire outlet structure 310 and the rubber clamping strip 343 is the same as the length of the wire reel support 36, so that after the movement, the wire outlet structure 310 in the middle of the adjustment cover 311 still overlaps with the wire outlet structure 310 on the cover 39.

[0040] Please refer to Figure 5-Figure 6 The present embodiment provides a 3D special printing device, the wire reel support 36 includes a support rod 361, a fixed ring 362, a movable ring 363, a threaded connection groove 364, a guide rod 365, a threaded positioning block 366, and an auxiliary rod 367. The left end surface of the support rod 361 is fixed with a fixed ring 362, the inner side of the movable ring 363 is threadedly connected to the support rod 361, the right end of the support rod 361 is provided with a threaded connection groove 364, the right end of the guide rod 365 is fixed to the support rod 361, the threaded positioning block 366 is movable on the outside of the guide rod 365, and the top end thereof is fixed with an auxiliary rod 367.

[0041] In some embodiments, multiple groups of wire reel supports 36 are provided, wherein the wire reel supports 36 are connected to each other through threaded positioning blocks 366, and the first and last groups of wire reel supports 36 are threadedly connected to the left support bracket 35 and the movable limiting rod 38 respectively. By rotating the movable limiting rod 38, its thread is embedded in the threaded connection groove 364 at the right end of the wire reel support 36.

[0042] Please refer to Figure 7-Figure 8 The present embodiment provides a 3D special printing device, wherein the connecting assembly 4 comprises a supporting frame 41, a connecting plate 42, a clamping member 43, a motor 44, a screw 45, a slide 46, and a mounting plate 47. The right end of the supporting frame 41 is fixed with the connecting plate 42, the left end of the clamping member 43 is fixed with the connecting plate 42, the motor 44 is mounted on the left end of the supporting frame 41, and the right end thereof is connected to the screw 45 by a coupling for transmission, the inner side of the slide 46 is threadedly connected with the screw 45, and it slides on the left end of the clamping member 43, the right end of the mounting plate 47 is fixed to the left end of the assembly 31 by bolts, and the left end thereof is clamped with the clamping member 43.

[0043] In some embodiments, a card slot with a "T"-shaped cross-section is provided inside the left end of the mounting plate 47, which is convenient for forming a card connection with the card connector 43 to achieve a quick and stable connection, and facilitate the rapid installation of the mounting component 3 on the 3D special printing device through the connecting component 4. The slide 46 has a "cross" shape and contacts with multiple groups of movable card blocks 435, which facilitates the movement of the slide 46 into the interior of the card connector 43, and through the continuous movement of the slide 46, the group of movable card blocks 435 are pushed to move outward synchronously and snap into the "T"-shaped card slot of the mounting plate 47 to form a card connection.

[0044] Please refer to Fig. 9 The present embodiment provides a 3D special printing device, wherein the clamping member 43 comprises a base 431, a connecting rod 432, a limiting rod 433, a spring 434, and a movable clamping block 435. The left end of the base 431 is fixed with the connecting rod 432, the left end of the connecting rod 432 is fixed to the connecting plate 42, the right end of the base 431 is internally fixed with the limiting rod 433, the bottom end of the spring 434 is fixed to the base 431, and the movable clamping block 435 is elastically connected to the base 431 by the spring 434.

[0045] In some embodiments, a slide groove is provided inside the base 431, and a movable snap-in block 435 slides in the slide groove, and the inner side of the movable snap-in block 435 is inclined. The movable snap-in block 435 contacts the inclined edge of the right end of the slide seat 46, and the slide seat 46 continuously moves inward to push the movable snap-in block 435 to move outward. When the movable snap-in block 435 is not affected by the slide groove 46, it is reset under the elastic action of the spring 434, and can be detached from the "T"-shaped slot, thereby completing the separation of the mounting plate 47.

[0046] Please refer to Fig.10 , this embodiment provides a 3D special printing device, the wire outlet structure 310 includes a receiving plate 3101, a guide seat 3102, a servo motor 3103, a conveying wheel 1 3104, a swing block 3105, a tension spring 3106, and a conveying wheel 2 3107, the receiving plate 3101 is installed at the bottom of the cover plate 39, the top of the receiving plate 3101 is provided with a guide seat 3102, the receiving plate 3101 is bolted to the rear end of the servo motor 3103, the output end of the servo motor 3103 is transmission-connected to the conveying wheel 1 3104, the swing block 3105 is rotationally connected to the upper right end of the receiving plate 3101, the left end of the tension spring 3106 is fixed to the receiving plate 3101, the right end of the tension spring 3106 is fixed to the swing block 3105, and the swing block 3105 is rotationally connected to the middle part of the conveying wheel 2 3107.

[0047] In some embodiments, the bottom end of the guide seat 3102 gradually tilts outward to expand, so that the filamentary consumables in the material filament reel 5 can pass upward through the guide seat 3102, and a rubber ring can be provided on the inner side of the guide seat 3102 to play a buffering and protective role to avoid friction between the consumable wire and the guide seat 3102, which may cause cutting and breaking. In addition, an arc groove is provided inside the positioning plate 32, and a rubber pad is provided in the groove. By embedding the left support bracket 35 into the arc groove and strengthening the connection with the rubber pad, the left support bracket 35 can be stably placed without The material wire is susceptible to shaking, and the left and right sides of the material wire are in contact with the conveying wheel 1 3104 and the conveying wheel 2 3107 respectively. The surfaces of the conveying wheel 1 3104 and the conveying wheel 2 3107 are provided with anti-slip grooves. The servo motor 3103 drives the conveying wheel 1 3104 to transmit, so that friction is formed between the conveying wheel 1 3104 and the material wire to push the material wire out, and during the material wire conveying process, the tension spring 3016 on the swing block 3105 will be deformed to absorb the polarization force on the conveying wheel 2 3107, so that the material wire can be conveyed smoothly.

[0048] The present invention provides a 3D special printing device through improvement, and its working principle is as follows;

[0049] The support frame 41 is bolted to the frame of the 3D special printing device, and the mounting assembly 3 with the material wire disc 5 placed thereon is embedded into the interior of the connecting plate 42 through the mounting plate 47, and the motor 44 is started to drive the screw rod 45 to rotate, so that the slide 46 moves outward, squeezes the movable clamping block 435 to move outward, and pulls the spring 434, and the movable clamping block 435 moves outward and is clamped into the "T"-shaped clamping groove of the mounting plate 47 to achieve clamping, thereby completing the stable placement of the mounting assembly 3 and installing it on the frame of the 3D special printing device;

[0050] One end of the material filament reel 5 is connected to the inside of the print head 6, and the filamentary consumables introduced from the material filament reel 5 are heated into liquid through the heating and melting chamber inside the print head 6, and are ejected through the nozzle 7 under a certain pressure, and solidified on the support plate 2. Through the setting of the program in the 3D printing device, the print head 6 is moved, and the liquid consumables are stacked and welded layer by layer to form a complete 3D printed object;

[0051] When the material wire reel 5 needs to be replaced, the cover plate 39 and the adjustment cover plate 311 are removed, and the integrated left support bracket 35, the wire reel support member 36, the right support bracket 37, and the movable limit rod 38 are taken out;

[0052] The auxiliary rod 367 in the wire reel support 36 corresponding to the material wire reel 5 to be replaced is rotated to recover and reset the threaded positioning block 366, and another group of threaded positioning blocks 366 embedded in the threaded connection groove 364 of the group of wire reel support 36 is unscrewed, so that the group of wire reel support 36 and the corresponding placed material wire reel 5 can be directly removed, and the placed material wire reel 5 can be taken out and replaced by rotating the movable ring 363, and the above operation is reversed to install and reset the wire reel support 36 and the replaced material wire reel 5, and when it is placed in the assembly 31 and the movable assembly 34, it can be positioned by the positioning plates 32 on the left and right sides and the positioning track 33 at the bottom, and one end of the filamentary consumables in the material wire reel 5 is passed upward through the wire outlet structure 310 to be connected to the print head 6;

[0053] When the number of material wire reels 5 needs to be increased, the placement of the material wire reels 5 can be achieved by increasing the number of wire reel supports 36, and according to the increased number of wire reel supports 36, the movable assembly 34 is moved outward to engage the corresponding point distance, thereby extending the overall length of the installation component 3 for ease of use.

[0054] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A 3D special printing device, characterized in that: It comprises a workbench (1), a supporting plate (2), a mounting assembly (3), a connecting assembly (4), a material filament reel (5), a printing head (6), and a nozzle (7); A supporting plate (2) is installed on the top of the workbench (1); One end of the mounting assembly (3) is locked and fixed to the connecting assembly (4), and the connecting assembly (4) is installed on a frame of the 3D special printing device; The material filament reel (5) is movably mounted inside the mounting assembly (3), and one end of the material filament reel is connected to the printing head (6), and a nozzle (7) is mounted at the bottom end of the printing head (6); The installation component (3) comprises an assembly (31), a positioning plate (32), a positioning rail (33), a movable assembly (34), a left support bracket (35), a wire reel support (36), a right support bracket (37), a movable limiting rod (38), a cover plate (39), a wire outlet structure (310), and an adjustment cover plate (311); the left end of the assembly (31) is bolted with a connecting component (4), the left end of the positioning plate (32) is fixed to the assembly (31), the bottom end of the positioning rail (33) is fixed to the assembly (31), the left end of the movable assembly (34) is clamped with the assembly (31), and the left support bracket (35) is respectively clamped with the positioning plate (32) and the bottom end of the positioning rail (33) is fixed to the assembly (31), The positioning plate (32) and the positioning rail (33) are connected, the left end of the wire reel support (36) is threadedly connected to the left support bracket (35), the right support bracket (37) is placed inside the movable assembly (34), and the inside of the right support bracket (37) is movable with a movable limiting rod (38), the left end of the movable limiting rod (38) is threadedly connected to the wire reel support (36), the bottom of the cover plate (39) is installed on the wire outlet structure (310), the left end of the adjustment cover plate (311) slides inside the cover plate (39), and the cover plate (39) and the adjustment cover plate (311) are respectively embedded downward into the top of the assembly (31) and the movable assembly (34).

2. A 3D special printing device according to claim 1, characterized in that: The wire reel support (36) comprises a support rod (361), a fixed ring (362), a movable ring (363), a threaded connection groove (364), a guide rod (365), a threaded positioning block (366), and an auxiliary rod (367). The left end surface of the support rod (361) is fixed with a fixed ring (362), the inner side of the movable ring (363) is threadedly connected to the support rod (361), the right end of the support rod (361) is provided with a threaded connection groove (364), the right end of the guide rod (365) is fixed to the support rod (361), the threaded positioning block (366) is movable on the outside of the guide rod (365), and the top end thereof is fixed with an auxiliary rod (367).

3. A 3D special printing device according to claim 1, characterized in that: The movable assembly (34) comprises an outer cover (341), a sliding plate (342), and a rubber snap-fit ​​strip (343); the sliding plate (342) is fixed to the left end of the outer cover (341); the rubber snap-fit ​​strip (343) is fixed to the top end of the sliding plate (342); the top end of the rubber snap-fit ​​strip (343) is snap-fitted to the assembly (31); and the top end of the outer cover (341) is embedded with an adjustment cover (311).

4. A 3D special printing device according to claim 1, characterized in that: The connecting assembly (4) comprises a support frame (41), a connecting plate (42), a clamping member (43), a motor (44), a screw (45), a slide seat (46), and a mounting plate (47). The right end of the support frame (41) is fixed with the connecting plate (42), the left end of the clamping member (43) is fixed to the connecting plate (42), the motor (44) is mounted on the left end of the support frame (41), and the right end of the motor (44) is connected to the screw (45) by a coupling, the inner side of the slide seat (46) is threadedly connected to the screw (45), and the slide seat (46) slides on the left end of the clamping member (43), the right end of the mounting plate (47) is fixed to the left end of the assembly (31) by bolts, and the left end of the motor (44) is clamped to the clamping member (43).

5. A 3D special printing device according to claim 4, characterized in that: The clamping member (43) comprises a base (431), a connecting rod (432), a limiting rod (433), a spring (434), and a movable clamping block (435); the left end of the base (431) is fixed with a connecting rod (432); the left end of the connecting rod (432) is fixed to the connecting plate (42); the right end of the base (431) is internally fixed with a limiting rod (433); the bottom end of the spring (434) is fixed to the base (431); and the movable clamping block (435) is elastically connected to the base (431) by the spring (434).

6. The 3D special printing equipment according to claim 1, characterized in that: The right end of the left support bracket (35) is provided with a positioning groove, and a threaded positioning block (366) is threadedly connected in the positioning groove.

7. The 3D special printing equipment according to claim 1, characterized in that: The distribution spacing of the multiple groups of wire outlet structures (310) and rubber clamping strips (343) is the same as the length of the wire reel support (36).

8. The 3D special printing equipment according to claim 4, characterized in that: A slot with a T-shaped cross section is provided inside the left end of the mounting plate (47).

9. The 3D special printing device according to claim 4, characterized in that: The sliding seat (46) has a "cross" shape and is in contact with multiple groups of movable clamping blocks (435).

10. The 3D special printing equipment according to claim 1, characterized in that: The wire-exiting structure (310) comprises a receiving plate (3101), a guide seat (3102), a servo motor (3103), a first conveying wheel (3104), a swing block (3105), a tension spring (3106), and a second conveying wheel (3107); the receiving plate (3101) is mounted on the bottom of the cover plate (39); the top of the receiving plate (3101) is provided with a guide seat (3102); the receiving plate (3101) and the servo motor (3103) are connected to each other. 03), the output end of the servo motor (3103) is transmission-connected to the conveying wheel one (3104), the swing block (3105) is rotationally connected to the upper right end of the receiving plate (3101), the left end of the tension spring (3106) is fixed to the receiving plate (3101), the right end of the tension spring (3106) is fixed to the swing block (3105), and the swing block (3105) is rotationally connected to the middle part of the conveying wheel two (3107).

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