A 3D printing nozzle and a 3D printing device

Abstract

The present application relates to a 3D printing nozzle and a 3D printing device, wherein a 3D printing nozzle comprises: a sliding block, a limiting assembly and a spraying assembly; the limiting assembly comprises a slide rail, a limiting member and two motion triggering members, the slide rail is connected to the sliding block, the limiting member is slidably arranged on the slide rail, an opening is provided on the limiting member, a position control slot group is provided on the side wall of the opening, and two motion triggering members are installed on opposite sides of the limiting member; the spraying assembly comprises a nozzle group having at least two nozzles, the nozzle group is elastically connected to the sliding block, and the nozzle group slides in the position control slot group; the nozzle group and the position control slot group are cooperatively arranged so that the motion triggering member triggers the limiting member to slide on the slide rail, so that the nozzle group slides in the position control slot group until the designated nozzle in the nozzle group slides to the bottom. In this way, compared with the dual-nozzle print head structure that uses a cylinder slide rod structure, the present invention makes the nozzle switching structure in the 3D printing device more miniaturized through the setting of the limit component, and its switching structure is set separately, thereby realizing the integration of the nozzle group and effectively reducing the subsequent maintenance cost.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and more specifically, to a 3D printing nozzle and a 3D printing device. Background Art

[0002] 3D printing technology is an emerging additive manufacturing technology. Different from traditional subtractive or equal material processing and manufacturing methods, it adopts the principle of layer-by-layer accumulation, laying materials in each layer according to a specific printing path to finally form a three-dimensional part. At present, the application of 3D printing technology to fiber-reinforced resin-based composite materials has become an emerging composite material manufacturing process. Compared with traditional forming processes, the 3D printing process is simple, the processing cost is low, and the material utilization rate is high, which reduces the manufacturing cost of composite material components. At the same time, it can realize the integrated forming of complex structural parts without the need for mold and composite material connection process, providing an effective technical approach for low-cost and rapid manufacturing of lightweight complex material structures.

[0003] The simplest process model for 3D printing of continuous carbon fiber composite materials consists of three parts, namely the material itself, the nozzle area, and slicing and control. The current research on continuous carbon fiber 3D printing is more focused on thermoplastic resin-based composite materials with carbon fiber staple fibers as modified materials or continuous carbon fiber reinforced. As for the printing nozzle, a dual nozzle structure is more often used, in which one nozzle delivers thermoplastic resin and the other nozzle delivers continuous carbon fiber wire. The thermoplastic resin is melted by heating, and the carbon fiber wire is mixed with the thermoplastic matrix material and extruded together. The 3D printing of carbon fiber composite materials is performed through a process similar to FDM. The switching of these two nozzles mostly uses a cylinder slide as a driving mechanism. If a cylinder slide is used as a driving mechanism, an air compressor needs to be added, which adds cost to the use of the 3D printer, and there are many parts and a complex structure, which is not conducive to the integration of the mechanical structure of the printing nozzle, and also increases the machine failure rate and subsequent maintenance costs. Summary of the invention

[0004] In order to overcome the problem described in the above background technology that the use of a cylinder slide as a driving mechanism requires the addition of an air compressor device, which increases the cost of using a 3D printer, and has a large number of parts and a complex structure, which is not conducive to the integration of the mechanical structure of the printing nozzle, and also increases the machine failure rate and subsequent maintenance costs, the present application provides a 3D printing nozzle and a 3D printing device.

[0005] In order to solve the above technical problems, the technical solution adopted in this application is:

[0006] A 3D printing nozzle, comprising: a sliding block, a limiting component and a spraying component;

[0007] The position limiting assembly comprises a slide rail, a position limiting member and two motion triggering members, the slide rail is connected to the sliding block, the position limiting member is slidably arranged on the slide rail, an opening is provided on the position limiting member, a position control groove group is provided on the side wall of the opening, and the two motion triggering members are installed on opposite sides of the position limiting member;

[0008] The spray assembly comprises a spray head group having at least two nozzles, the spray head group is elastically connected to the sliding block, and the spray head group slides in the position control groove group;

[0009] The nozzle group is cooperatively arranged with the position control slot group, so that the motion trigger member triggers the limit member to slide on the slide rail, and the nozzle group slides in the position control slot group until the designated nozzle in the nozzle group slides to the bottom.

[0010] In one embodiment, a connecting plate is provided on the sliding block, the slide rail is mounted on the connecting plate, and the nozzle group is elastically connected to the connecting plate.

[0011] In one embodiment, the sliding block is connected to an elastic member, and the elastic member is connected to the nozzle group;

[0012] The sliding block is connected with a lifting track for limiting the lateral deviation of the nozzles in the nozzle group, and a slide table is slidably arranged on the lifting track, and the nozzle group is slidably connected with the slide table.

[0013] In one embodiment, the elastic member is configured as a spring, the sliding block is connected to a spring retainer for fixing the height of each nozzle in the nozzle group, the spring retainer is connected to the spring, and the spring is connected to the nozzle group.

[0014] In one embodiment, a controlled frame is mounted on the elastic member, a sliding member is disposed at one end of the controlled frame, the sliding member is slidably disposed in the control slot group, and the controlled frame is connected to the nozzle group.

[0015] In one embodiment, the nozzle group includes three nozzle units, the three nozzle units are elastically connected in sequence, and the three nozzle units are slidably connected to the side walls of the position control slot group, and the top ends of the two nozzle units located on the outer side are elastically connected to the sliding block;

[0016] The control slot group includes a left low area, three flat areas and a right low area in sequence, and the left low area is connected to the flat area by an inclined plane offset upward and toward the middle, and the flat area is connected to the right low area by an inclined plane offset upward and toward the middle.

[0017] In one embodiment, the spray head unit comprises a heating block, a pneumatic joint, a heat sink and a nozzle, wherein the pneumatic joint is mounted on the heat sink, the heating block is mounted on the heat sink, and the nozzle is mounted on the heating block;

[0018] The three radiators are elastically connected in sequence, and the top ends of the two radiators located at the outer sides are elastically connected to the sliding block.

[0019] A 3D printing device, comprising the 3D printing nozzle according to any one of the above embodiments, further comprising: a frame, a lateral movement assembly for driving the sliding block to move lateraly, and two longitudinal movement assemblies for driving the lateral movement assembly to move longitudinally;

[0020] The longitudinal movement components are installed in parallel on the frame, the transverse movement components are connected to the two longitudinal movement components, and the sliding block is connected to the transverse movement components so that the transverse movement components drive the corresponding motion triggering parts to trigger the abutment with the corresponding longitudinal movement components.

[0021] In one embodiment, the longitudinal movement assembly includes a guide rail and a guide driver, and the transverse movement assembly is provided with two guide blocks, the guide blocks are slidably connected to the guide rails, the guide driver is installed on the frame, and the output end of the guide driver is connected to the guide blocks.

[0022] In one embodiment, the transverse movement assembly includes a sliding rail and a sliding driver, the sliding rail is connected to the two longitudinal movement assemblies, the sliding block is slidably connected to the sliding rail, the sliding driver is installed on the sliding rail, and the output end of the sliding driver is connected to the sliding block.

[0023] Compared with the prior art, the beneficial effect is: when it is necessary to adjust the designated nozzle in the nozzle group to the lowest position, the motion trigger member is triggered and abutted with the corresponding external component, so that the motion trigger member can push the limit member to slide on the slide rail. Because one end of the nozzle group is elastically fixed on the sliding block, and the other end of the nozzle group will naturally fall to a fixed position under the action of gravity, when the limit member slides, the nozzle group can slide in the control slot group until the designated nozzle in the nozzle group reaches the bottom, so that it can be sprayed and printed. In this way, compared with the dual-nozzle print head structure that uses a cylinder slide rod structure, the present invention makes the nozzle switching structure in the 3D printing device more miniaturized through the setting of the limit component, and its switching structure is set separately, which realizes the integration of the nozzle group and effectively reduces the subsequent maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the three-dimensional structure of a 3D printing device according to an embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the structure in which the limiting assembly and the spraying assembly of the embodiment of the present application are matched on the sliding block;

[0026] Figure 3 is a schematic diagram of a three-dimensional structure in which a position-limiting member according to an embodiment of the present application is matched with a slide rail;

[0027] Figure 4 is a schematic structural diagram of a position control groove group of a position limiting member according to an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of a three-dimensional structure in which nozzle No. 1 of an embodiment of the present application is located at the bottom;

[0029] Figure 6 It is a schematic diagram of a three-dimensional structure in which the second nozzle of the embodiment of the present application is located at the bottom;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure in which the nozzle No. 3 of the embodiment of the present application is located at the bottom.

[0031] 101, limit assembly; 102, longitudinal movement assembly; 103, transverse movement assembly;

[0032] 201, moving part; 202, connecting part; 203, spring retainer; 204, motion trigger; 205, limiter; 206, spring; 207, third controlled rod; 208, lifting track; 209, slide;

[0033] 301, pneumatic joint; 302, radiator; 303, heating block;

[0034] 401, slider; 402, slide rail;

[0035] 501, No. 1 nozzle; 502, No. 2 nozzle; 503, No. 3 nozzle;

[0036] 601, left low area; 602, first gentle area; 603, second gentle area; 604, third gentle area; 605, right low area;

[0037] 701. Controlled rod number one. DETAILED DESCRIPTION

[0038] The technical solution of the present application is further described in detail below through specific embodiments and in combination with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0039] Example 1

[0040] like Figures 1 to 3 As shown, in this embodiment, a 3D printing nozzle includes: a sliding block, a limiting component 101 and a spraying component; the limiting component 101 includes a slide rail 402, a limiting member 205 and two motion triggering members 204, the slide rail 402 is connected to the sliding block, the limiting member 205 is slidably set on the slide rail 402, the limiting member 205 is provided with an opening, and a control groove group is provided on the side wall of the opening, and two motion triggering members 204 are installed on opposite sides of the limiting member 205; the spraying component includes a nozzle group with at least two nozzles, the nozzle group is elastically connected to the sliding block, and the nozzle group slides in the control groove group; the nozzle group and the control groove group are cooperatively arranged so that the motion triggering member 204 triggers the limiting member 205 to slide on the slide rail 402, so that the nozzle group slides in the control groove group until the designated nozzle in the nozzle group slides to the bottom.

[0041] Specifically, Figure 1 In the embodiment, the slide rail slides left and right on the external component along with the sliding block, a slider 401 is provided on the bottom surface of the limiter 205, and the slider 401 is slidably provided on the slide rail 402. An opening is provided on one surface of the limiter 205, and a position control slot group is provided on the lower side wall of the opening. The number and shape of the position control slot group are set in accordance with the actual production requirements, so as to coordinate and adjust with the nozzle group so that the height of the nozzle required to be printed in the nozzle group can slide to the bottom. One end of the nozzle group is elastically connected to the sliding block, and the nozzle group is slidably connected to the side wall of the position control slot group. Among them, the motion trigger member 204 is set as an abutment rod, and the limiter 205 is set as a limit plate.

[0042] It is worth noting that when it is necessary to adjust the designated nozzle in the nozzle group to the lowest position, the motion trigger member 204 is triggered and abutted with the corresponding external component, so that the motion trigger member 204 can push the limit member 205 to slide on the slide rail 402. Because one end of the nozzle group is elastically fixed on the sliding block, and the other end of the nozzle group will naturally fall to a fixed position under the action of gravity, when the limit member 205 slides, the nozzle group can slide in the control slot group until the designated nozzle in the nozzle group reaches the bottom, so that it can be sprayed and printed. In this way, compared with the dual-nozzle print head structure that uses a cylinder slide rod structure, the present invention makes the nozzle switching structure in the 3D printing device more miniaturized through the setting of the limit component 101, and its switching structure is set separately, which realizes the integration of the nozzle group and effectively reduces the subsequent maintenance cost.

[0043] In order to facilitate the installation of the nozzle group, Figure 2 and Figure 3 As shown, in one embodiment, a connecting plate is provided on the sliding block, the slide rail 402 is installed on the connecting plate, and the nozzle group is elastically connected to the connecting plate.

[0044] Specifically, the connecting plate includes a moving part 201 and a connecting part 202 which are connected to each other, and the moving part 201 and the connecting part 202 are arranged in an L shape. The moving part 201 is slidably arranged on the external component through a sliding block. The nozzle group is elastically connected to the top of the front of the connecting part 202. The slide rail 402 is installed in front of the connecting part 202, and the slide rail 402 is arranged below the connection between the nozzle group and the connecting part. The limit member 205 slides in front of the slide rail 402 through the slider 401, and the nozzle group is arranged in front of the limit member 205, that is, the rear of the nozzle group slides in the control groove group.

[0045] In order to facilitate the nozzles in the nozzle group to slide in the control groove, Figure 3 As shown, in one embodiment, an elastic member is connected to the sliding block, and the elastic member is connected to the nozzle group; the sliding block is connected to a lifting track 208 for limiting the lateral displacement of the nozzles in the nozzle group, and a slide 209 is slidably arranged on the lifting track 208, and the nozzle group is slidably connected to the slide 209.

[0046] Specifically, one end of the elastic member is connected to the connecting portion 202, and the other end is connected to the nozzle group, so that the nozzle group is subjected to the elastic abutment of the elastic member in the position control slot group, so that the nozzle group can be kept in abutment with the side wall of the position control slot group. This is to facilitate the adjustment of the required nozzle to the lowest position. The nozzle group slides on the lifting track 208 through the slide 209, and can not only naturally fall to a fixed position by gravity, but also limit the lateral displacement of the nozzle group through the lifting track 208, so as to avoid the nozzle group from moving synchronously with the position control slot when the limiting member 205 is displaced, and avoid the position of the nozzle being fixed in the position control slot, thereby affecting the position adjustment of the nozzle, so as to facilitate the sliding of the nozzle group in the limiting member 205.

[0047] In order to facilitate the printing and spraying of the nozzle group, Figure 3 As shown, in one embodiment, the elastic member is configured as a spring 206, and a spring retainer 203 for fixing the height of each nozzle in the nozzle group is connected to the sliding block, the spring retainer 203 is connected to the spring 206, and the spring 206 is connected to the nozzle group.

[0048] Specifically, the spring retainer 203 is mounted on the top of the front of the connecting portion 202, and the top of the spring 206 is mounted on the spring retainer 203, so that the spring 206 and the stopper 205 are arranged parallel to each other, and the bottom of the spring 206 is connected to the nozzle group. When the designated nozzle reaches the bottom, the spring retainer 203 works, and the length of the spring is kept unchanged by the spring retainer 203. At this time, the stopper assembly can be removed, so that it is convenient for the external assembly to drive the nozzle group to print later, and the stopper assembly is prevented from affecting the displacement change of the nozzle group.

[0049] In order to facilitate the installation of the elastic member and the nozzle unit, Figure 3As shown, in one embodiment, a controlled frame is mounted on the elastic member, a sliding member is disposed at one end of the controlled frame, the sliding member is slidably disposed in the control position slot group, and the controlled frame is connected to the nozzle group.

[0050] Specifically, the top of the controlled frame is installed at the bottom of the spring 206, a sliding member is provided on the side of the controlled frame close to the limiter 205, and the bottom of the controlled frame is connected to the nozzle group, and the nozzle group is ensured to slide in the control slot group through the connection of the controlled frame. The sliding member is set as a slide rod.

[0051] Example 2

[0052] The existing 3D printing nozzles are relatively bulky due to the limitation of the dual-drive structure, which not only limits the printing speed but also affects the printing quality. In addition, dual-nozzle 3D printers limit the freedom of choosing printing materials. When printing the supporting part of the part, only the part matrix material can be used. There are no extra nozzles for printing water-soluble support materials that are easy to remove. This will affect the surface quality and printing accuracy of the supported part of the model. In order to solve this problem, Figures 3 to 7 As shown, on the basis of Example 1, in this embodiment, the nozzle group includes three nozzle units, the three nozzle units are elastically connected in sequence, and the three nozzle units are slidably connected to the side walls of the control slot group, and the tops of the two nozzle units located on the outside are elastically connected to the sliding block; the control slot group includes a left low area 601, three flat areas and a right low area 605 in sequence, and the left low area 601 is connected to the flat area by an inclined surface offset upward and toward the middle, and the flat area and the right low area 605 are connected by an inclined surface offset upward and toward the middle.

[0053] Specifically, the three nozzle units are arranged in parallel, and the three nozzle units are elastically connected in sequence through elastic members, and the elastic force of the elastic members is smaller than gravity, and the elastic members are arranged as springs. Two lifting rails 208 are connected in parallel on the connecting part 202, and the slide 209 slides on the lifting rails 208. The spring retainer 203, the spring, the controlled frame and the lifting rail 208 are all set in two. The two spring retainers 203 are respectively fixedly connected to a spring 206, and each spring 206 is fixedly connected to the top of a controlled frame. The bottom ends of the two controlled frames are respectively connected to the nozzle units located on the outside. The bottom ends of the two nozzle units located on the outside are slidably set on the two slides 209. When the motion trigger member 204 is triggered, the limiting member 205 is driven to slide. At this time, the two nozzle units located on the outside slide on the lifting rails 208 respectively through the slide 209, and the lifting rails 208 limit the lateral displacement of the two nozzle units located on the outside, so that the three nozzle units can slide in the control slot group, so that the nozzle unit required for spraying can be adjusted to the bottom. The position control slot group is arranged from left to right in sequence as a left low area 601, three flat areas and a right low area 605. The left low area 601 and the flat area, and the flat area and the right low area 605 are connected by inclined planes. The three flat areas are arranged evenly spaced in sequence, so that the three nozzle units can slide in the position control slot group. Among them, when the three nozzle units are respectively located in the flat areas, the nozzle unit located in the middle is only affected by the elastic force of the elastic parts of the nozzle units on both sides, and its gravity is greater than the elastic force on both sides. Therefore, it can be located at the bottom under the action of gravity. The present invention allows the number of 3D printing nozzles to be increased to three, and the switching structure between the three nozzles is miniaturized, which is convenient for the integration of the printing nozzles and reduces the later maintenance cost of the 3D printing device. Because the number of nozzles is increased to three, the freedom of selecting printing materials is improved, water-soluble support materials can be printed, and the surface quality and printing accuracy of the supported part of the model are improved.

[0054] In one embodiment, the connection surfaces among the left low area 601, the three flat areas and the right low area 605 are provided with chamfers to facilitate the sliding of the three spray head units.

[0055] In order to facilitate the printing of the nozzle unit, such as Figure 3 As shown, in one embodiment, the nozzle unit includes a heating block 303, a pneumatic joint 301, a radiator 302 and a nozzle, and the pneumatic joint 301 is installed on the radiator 302, the heating block 303 is installed on the radiator 302, and the nozzle is installed on the heating block 303; the three radiators 302 are elastically connected in sequence, and the top ends of the two radiators 302 located on the outside are elastically connected to the sliding block.

[0056] Specifically, three radiators 302 are arranged in parallel, and the three radiators 302 are elastically connected in turn by elastic members, and the bottom ends of the two radiators 302 located on the outside are installed on the corresponding slide 209. The pneumatic joint 301, the heating block 303 and the radiator 302 cooperate to enable the nozzle to operate normally and perform 3D printing. Among them, the way in which the pneumatic joint 301, the heating block 303, the radiator 302 and the nozzle cooperate to work is known to those skilled in the art and is achievable, and is not described in detail in this embodiment.

[0057] To facilitate printing of the nozzle group, in one embodiment, the printing materials of the three nozzles are sequentially set to thermoplastic resin, continuous carbon fiber and water-soluble support material.

[0058] Specifically, during printing, the freedom of selecting printing materials is improved, and water-soluble support materials can be printed, thereby improving the surface quality and printing accuracy of the supported parts of the model.

[0059] Example 3

[0060] This embodiment is similar to Embodiment 1, except that, in this embodiment, the nozzle group includes two nozzle units, the top ends of the two nozzle units are respectively connected to the bottom ends of the controlled frame, and the two nozzle units slide on the lifting track 208 through the slide 209 respectively; the control position slot group is sequentially arranged as a flat zone, a middle-low zone and a flat zone.

[0061] In this way, printing is performed by raising and lowering the two nozzles.

[0062] Example 4

[0063] This embodiment is similar to Embodiment 1, with the difference being that, in this embodiment, the nozzle group includes four nozzle units, the top ends of the four nozzle units are respectively connected to the bottom ends of the controlled frame, and the four nozzle units slide on the lifting track 208 through the slide 209 respectively; the control position slot group is arranged from left to right in sequence as a flat area, a left low area 601, four flat areas and a right low area 605.

[0064] In this way, printing is performed by raising and lowering the four nozzles.

[0065] Example 5

[0066] like Figures 1 to 3As shown, this embodiment provides a 3D printing device, including the 3D printing nozzle in any one of embodiments 1, 2, 3 or 4, and also includes: a frame, a transverse moving assembly 103 for driving the sliding block to move horizontally, and two longitudinal moving assemblies 102 for driving the transverse moving assembly 103 to move longitudinally; the longitudinal moving assemblies 102 are installed in parallel on the frame, the transverse moving assembly 103 is connected to the two longitudinal moving assemblies 102, and the sliding block is connected to the transverse moving assembly 103, so that the transverse moving assembly 103 drives the corresponding motion triggering member 204 to trigger the abutment with the corresponding longitudinal moving assembly 102. When it is necessary to adjust the specified nozzle in the nozzle group to the lowest point, the sliding block is driven to slide by the transverse moving assembly 103, thereby driving the motion triggering member 204 on the limit member 205 to abut against the corresponding longitudinal moving assembly 102.

[0067] Specifically, Figure 1 In the embodiment, a lifting printing plate is installed on the frame, two longitudinal moving components 102 are installed on the left and right sides of the frame, and the two ends of the transverse moving component 103 slide on one longitudinal moving component 102 respectively, so that the longitudinal moving component 102 can drive the transverse moving component 103 to slide forward and backward, and the sliding block is slidably arranged on the transverse moving component 103, so that the transverse moving component 103 can drive the sliding block to slide left and right, and the longitudinal moving component 102 and the transverse moving component 103 are arranged perpendicular to each other. The slide rail slides left and right on the transverse moving component 103 with the sliding block. The moving part 201 is slidably arranged above the transverse moving component 103 through the sliding block, so that the connecting part 202 and the transverse moving component 103 are arranged parallel to each other.

[0068] In order to facilitate the sliding of the transverse moving assembly 103 on the longitudinal moving assembly 102, as shown in FIG. Figure 1 As shown, in one embodiment, the longitudinal movement component 102 includes a guide rail and a guide driver, and the transverse movement component 103 is provided with two guide blocks, the guide blocks are slidably connected to the guide rails, the guide driver is installed on the frame, and the output end of the guide driver is connected to the guide blocks.

[0069] Specifically, the guide driver is mounted on the top surface of the frame, the guide rail is mounted on the top surface of one side of the frame, and two guide blocks are arranged at the bottom of the transverse movement assembly 103, each guide block slides on a guide rail, and the guide block can be driven to move forward and backward on the guide rail through the driving action of the guide driver. The guide driver is set as a motor, and the way in which the motor drives the guide block to slide on the guide rail is known to those skilled in the art and can be implemented, and will not be described in detail in this embodiment.

[0070] In order to facilitate the sliding block to slide on the transverse movement assembly 103, as shown in FIG. Figure 1As shown, in one embodiment, the transverse movement component 103 includes a sliding rail and a sliding driver, the sliding rail is connected to the two longitudinal movement components 102, the sliding block is slidably connected to the sliding rail, the sliding driver is installed on the sliding rail, and the output end of the sliding driver is connected to the sliding block.

[0071] Specifically, guide blocks are provided at both ends of the sliding rail, a sliding driver is installed at one end of the sliding rail, the sliding block is slidably provided on the sliding rail, and the sliding driver drives the sliding block to move left and right on the sliding rail. The sliding driver is provided as a motor, and the manner in which the motor drives the sliding block to slide on the sliding rail is known to those skilled in the art and can be implemented, and is not described in detail in this embodiment.

[0072] When this embodiment is combined with embodiment 2, Figures 4 to 7 As shown, the working principle of the switching of the three nozzles is as follows:

[0073] The nozzles can be set to No. 1 nozzle 501, No. 2 nozzle 502 and No. 3 nozzle 503 from left to right, the three smooth areas can be set to No. 1 smooth area 602, No. 2 smooth area 603 and No. 3 smooth area 604 from left to right, and the controlled rods can be set to No. 1 controlled rod 701 and No. 3 controlled rod 207 from left to right:

[0074] refer to Figure 5 When the motion triggering member 204 moves and collides with the longitudinal moving component 102 on the left, the motion triggering member 204 transmits power to the limiting member 205. Figure 3 At this time, the slider 401 installed with the stopper 205 is moved to the right along the slide rail 402 with the stopper 205 under the action of the force. At this time, the No. 1 controlled rod 701 of the No. 1 nozzle 501 is seated in the left low area 601 under the action of the force of the spring 206 and the movement of the stopper 205, and the No. 3 controlled rod 207 of the No. 3 nozzle 503 is seated in the second gentle area 603 under the action of the force of the spring 206 and the movement of the stopper 205. At this time, the No. 1 nozzle 501 is at the lowest position among the three printing nozzles. At this time, the stopper assembly 101 is removed, and the No. 1 controlled rod 701 will be seated and maintained at the height of the left low area 601 under the control of the spring retainer 203 and the action of the spring 206, and the No. 3 controlled rod 207 will be seated and maintained at the height of the second gentle area 603 under the action of the spring 206. At this time, the No. 1 nozzle 501 can be used for printing.

[0075] refer to Figure 6 When the limiting component 101 moves and collides with the longitudinal moving component 102 on the right, the motion triggering component 204 transmits power to the limiting component 205. Figure 3At this time, the slider 401 installed with the stopper 205 is moved to the left along the slide rail 402 by the force of the stopper 205. At this time, the first controlled rod 701 of the first nozzle 501 is seated in the first gentle zone 602 under the force of the spring 206 and the movement of the stopper 205, and the third controlled rod 207 of the third nozzle 503 is seated in the third gentle zone 604 under the force of the spring 206 and the movement of the stopper 205. At this time, the second nozzle 502 is at the lowest position among the three printing nozzles. At this time, the stopper assembly 101 is removed, and the first controlled rod 701 will be seated and maintained at the height of the first gentle zone 602 under the force of the spring 206, and the third controlled rod 207 will be seated and maintained at the height of the third gentle zone 604 under the force of the spring 206. At this time, the second nozzle 502 can be used for printing.

[0076] refer to Figure 7 When the limiting component 101 moves and collides with the longitudinal moving component 102 on the right, the motion triggering component 204 transmits power to the limiting component 205. Figure 3 At this time, the slider 401 installed with the stopper 205 is moved to the left along the slide rail 402 by the force with the stopper 205 for a certain distance. At this time, the first controlled rod 701 of the first nozzle 501 is seated in the second gentle zone 603 under the force of the spring 206 and the movement of the stopper 205, and the third controlled rod 207 of the third nozzle 503 is seated in the right low zone 605 under the force of the spring 206 and the movement of the stopper 205. At this time, the third nozzle 503 is at the lowest position among the three printing nozzles. At this time, the stopper assembly 101 is removed, and the first controlled rod 701 will be seated and maintained at the height of the second gentle zone 603 under the force of the spring 206, and the third controlled rod 207 will be seated and maintained at the height of the right low zone 605 under the force of the spring 206. At this time, the third nozzle 503 can be used for printing.

[0077] The drawings are only for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limitations on this patent. In addition, it should also be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device are only for illustrative purposes and should not constitute any limitation on this application.

[0078] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those generally understood by technicians in the technical field of this application; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The same or similar reference numerals in the drawings of the embodiments of this application correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short" and the like indicating the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the position relationship in the drawings are only used for exemplary description and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0079] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but within the error tolerance range. "Parallel" is not strictly parallel, but within the error tolerance range. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of the embodiments of the present application, the orientation or position relationship indicated by the technical terms "thickness", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0080] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A 3D printing nozzle, characterized in that: include: A sliding block, a limiting component (101) and a spraying component; The position limiting assembly (101) comprises a slide rail (402), a position limiting member (205) and two motion triggering members (204); the slide rail (402) is connected to the sliding block; the position limiting member (205) is provided with a slider (401); the slider (401) is slidably arranged on the slide rail (402); an opening is provided on the position limiting member (205); a position control groove group is provided on the side wall of the opening; and the two motion triggering members (204) are installed on opposite sides of the position limiting member (205); The spray assembly includes a spray head group having at least two nozzles; The sliding block is connected to a lifting track (208) for limiting the lateral deviation of the nozzles in the nozzle group, a slide table (209) is slidably arranged on the lifting track (208), and the nozzle group is slidably connected to the slide table (209); An elastic member is connected to the sliding block, a controlled frame is mounted on the elastic member, a sliding member is arranged at one end of the controlled frame, the sliding member is slidably arranged in the control slot group, and the controlled frame is connected to the nozzle group, the sliding member and the control slot group are cooperatively arranged so that the motion trigger member (204) triggers the limit member (205) to slide on the slide rail (402), so that the sliding member slides in the control slot group until the height of the nozzle required to be printed in the nozzle group slides to the bottom.

2. The 3D printing nozzle according to claim 1, characterized in that: The sliding block is provided with a connecting plate, the sliding rail (402) is mounted on the connecting plate, and the nozzle group is elastically connected to the connecting plate.

3. The 3D printing nozzle according to claim 1, characterized in that: The elastic member is configured as a spring (206); the sliding block is connected to a spring retainer (203) for fixing the height of each nozzle in the nozzle group; the spring retainer (203) is connected to the spring (206); and the spring (206) is connected to the nozzle group.

4. The 3D printing nozzle according to claim 1, characterized in that: The nozzle group includes three nozzle units, the three nozzle units are elastically connected in sequence, and the three nozzle units are slidably connected to the side walls of the position control slot group, and the top ends of the two nozzle units located on the outer side are elastically connected to the sliding block; The position control slot group includes a left low area (601), three flat areas and a right low area (605) in sequence, and the left low area (601) is connected to the flat area via an inclined plane offset upward and toward the middle, and the flat area is connected to the right low area (605) via an inclined plane offset upward and toward the middle.

5. The 3D printing nozzle according to claim 4, characterized in that: The spray head unit comprises a heating block (303), a pneumatic joint (301), a heat sink (302) and a nozzle, wherein the pneumatic joint (301) is mounted on the heat sink (302), the heating block (303) is mounted on the heat sink (302), and the nozzle is mounted on the heating block (303); The three radiators (302) are elastically connected in sequence, and the top ends of the two radiators (302) located on the outer sides are elastically connected to the sliding block.

6. A 3D printing device, comprising the 3D printing nozzle according to any one of claims 1 to 5, further comprising: A frame, a transverse movement component (103) for driving the sliding block to move transversely, and two longitudinal movement components (102) for driving the transverse movement component (103) to move longitudinally; The longitudinal movement components (102) are installed in parallel on the frame, the transverse movement components (103) are connected to the two longitudinal movement components (102), and the sliding block is connected to the transverse movement component (103) so that the transverse movement component (103) drives the corresponding motion triggering member (204) to trigger abutment with the corresponding longitudinal movement component (102).

7. The 3D printing device according to claim 6, characterized in that: The longitudinal movement component (102) comprises a guide rail and a guide driver. The transverse movement component (103) is provided with two guide blocks, the guide blocks are slidably connected to the guide rails. The guide driver is mounted on the frame, and the output end of the guide driver is connected to the guide blocks.

8. The 3D printing device according to claim 6, characterized in that: The transverse movement component (103) comprises a sliding rail and a sliding driver, the sliding rail is connected to the two longitudinal movement components (102), the sliding block is slidably connected to the sliding rail, the sliding driver is installed on the sliding rail, and the output end of the sliding driver is connected to the sliding block.

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