Spray head device and 3D printing equipment

Abstract

The invention discloses a spray head device and 3D printing equipment. The spray head device comprises a throat pipe, a heat dissipation block, a spray head, a heating block and a heat insulation block. The throat pipe extends in the axial direction and is provided with an inner channel for consumables to pass through. The periphery of the throat pipe is sleeved with the heat dissipation block. The nozzle is arranged at the end, away from the heat dissipation block, of the throat pipe and used for spraying out consumables. The heating block is arranged on the periphery of the throat pipe in a sleeving mode, and a channel is formed in the heating block and used for installing the nozzle and the throat pipe; the heating block and the heat dissipation block are partially arranged at intervals in the axial direction of the throat pipe, and the heat dissipation block and the heating block are partially and oppositely arranged in the first direction perpendicular to the axial direction of the throat pipe; the heat insulation block is fixedly connected with the heat dissipation block and the heating block in the second direction perpendicular to the axial direction of the throat pipe. In this way, the structural stability and integration of the nozzle device can be improved.

Description

Technical Field

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

[0002] With the development of technology and the progress of the times, 3D printing technology has developed rapidly. The 3D printing device heats and ejects the printing consumables through the nozzle device, so as to process the consumables through technologies such as fused deposition modeling, and finally form a three-dimensional entity in a three-dimensional space, with very wide applications.

[0003] However, the structural stability of the nozzle device of the current 3D printing device is difficult to meet the requirements. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide a nozzle device and a 3D printing device, which can improve the structural stability and integration of the nozzle device.

[0005] In a first aspect, an embodiment of the present application provides a nozzle device, which includes a throat tube, a heat dissipation block, a nozzle, a heating block, and a heat insulation block. The throat tube extends axially and has an internal passage for the consumables to pass through; the heat dissipation block is sleeved on the outer periphery of the throat tube; the nozzle is arranged at one end of the throat tube away from the heat dissipation block for ejecting the consumables; the heating block is sleeved on the outer periphery of the throat tube, and a passage is formed inside the heating block for installing the nozzle and the throat tube; the heating block is partially spaced from the heat dissipation block along the axial direction of the throat tube, and the heat dissipation block and the heating block are partially opposite to each other in a first direction perpendicular to the axial direction of the throat tube; the heat insulation block is fixedly connected to the heat dissipation block and the heating block in a second direction perpendicular to the axial direction of the throat tube.

[0006] In a second aspect, an embodiment of the present application provides a 3D printing device, which includes the above nozzle device and a consumable conveying device for conveying the consumables into the throat tube and ejecting them through the nozzle.

[0007] The beneficial effects of the present application are as follows: Different from the prior art, by providing a nozzle device including a throat tube, a heat dissipation block, a nozzle, a heating block, and a heat insulation block, wherein the heating block is sleeved on the outer periphery of the throat tube near the nozzle end to heat the consumable in the throat tube channel at this position, so that the consumable becomes in a molten state for easy ejection by the nozzle, and the heat dissipation block is sleeved on the outer periphery of the throat tube for heat dissipation, thereby reducing the situation where too much consumable is heated to a molten state and blocking the nozzle; and by arranging the heating block at an interval with the heat dissipation block along the axial direction of the throat tube, the direct contact between the heating block and the heat dissipation block can be reduced, thereby reducing the heat loss of the heating block, effectively improving the heating effect of the heating block and the heat dissipation effect of the heat dissipation block, and thus improving the printing effect of the 3D printing device. By arranging the heat dissipation block and the heating block to be partially opposite to each other in a first direction perpendicular to the axial direction of the throat tube, it is beneficial to improve the space utilization rate between the two. On the basis of ensuring the overall size of the nozzle device, the sizes of the heat dissipation block and the heating block can be increased, thereby improving the heating effect of the heating block and the heat dissipation effect of the heat dissipation block, and being beneficial to improving the structural compactness of the nozzle device, and thus improving the integration of the nozzle device. In addition, a heat insulation block fixedly connected to the heat dissipation block and the heating block in a second direction perpendicular to the axial direction of the throat tube enables the two to be connected and fixed on the basis of reducing the direct contact between the heat dissipation block and the heating block. Different from the axial fixation in the related art that is prone to block the heat dissipation block or the heating block, the heat insulation block is used for fixed connection in the second direction perpendicular to the axial direction of the throat tube. On the one hand, the heat insulation block realizes the fixed connection between the heating block and the heat dissipation block. The heat insulation block can be in rigid contact with the heating block and the heat dissipation block respectively. At the same time, the fixed connection is realized through the second direction perpendicular to the axial direction of the throat tube, which can provide a stable rigid connection for the heat dissipation block and the heating block, thereby improving the working stability and reliability of the nozzle device. On the other hand, it is not easy to block the heat dissipation block or the heating block, which is convenient for observing them from the side. Furthermore, the disassembly and assembly efficiency of the heat insulation block can be improved. When disassembling the heat insulation block, the disassembly from the heat dissipation block and the heating block can be realized simultaneously, further improving the disassembly and assembly efficiency. At the same time, the space occupied by the heat dissipation block and the heating block in the axial direction can be reduced, and the influence on the heating effect of the heating block and the heat dissipation effect of the heat dissipation block can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic perspective view of an embodiment of a 3D printing device according to the present application;

[0009] Figure 2 is Figure 1 a schematic perspective view of the shown nozzle device;

[0010] Figure 3 is Figure 1 a schematic exploded view of the shown nozzle device;

[0011] Figure 4 is Figure 1Another three-dimensional structural schematic diagram of the shown spray head device;

[0012] Figure 5 is Figure 1 Another disassembled structural schematic diagram of the shown spray head device;

[0013] Figure 6 is Figure 1 Another disassembled structural schematic diagram of the shown spray head device;

[0014] Figure 7 is Figure 6 Three-dimensional structural schematic diagram of the shown fixing plate;

[0015] Figure 8 is Figure 6 Three-dimensional structural schematic diagram of the shown heat conducting block;

[0016] Figure 9 is Figure 6 Side view schematic diagram of the shown spray head device;

[0017] Figure 10 is Figure 6 Front view schematic diagram of the shown spray head device;

[0018] Figure 11 is Figure 6 Another front view schematic diagram of the shown spray head device;

[0019] Figure 12 is Figure 6 Partial structural schematic diagram of the shown tension adjustment mechanism.

[0020] Figure 13 is Figure 10 Schematic sectional view shown along the A-A cutting line in;

[0021] Figure 14 is Figure 11 Schematic sectional view shown along the B-B cutting line in;

[0022] Figure 15 is Figure 6 Three-dimensional structural schematic diagram of the shown throat tube;

[0023] Figure 16 is Figure 9 Schematic sectional view shown along the C-C cutting line in;

[0024] Figure 17 is Figure 10 Schematic sectional view shown along the D-D cutting line in. Detailed implementation manners

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0028] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] 3D printing devices usually convey consumables through a consumable conveying device to convey the consumables to a nozzle device for heating and ejection, so as to process the consumables through technologies such as fused deposition modeling to print a model. The consumables are the materials for 3D printing devices to print, generally in the form of coils wound around a material tray. By extruding and conveying the consumables into the nozzle device, the nozzle device then performs hot melting treatment on the input consumables and ejects them from the nozzle, so that the consumables are built into the required model.

[0030] During the process of a 3D printing device printing a model, the heating block in the nozzle device needs to heat some consumables to make them in a molten state, so as to facilitate the ejection of the consumables from the nozzle. In order to reduce the overflow of consumables or nozzle blockage caused by excessive consumables being heated to a molten state, a heat dissipation block needs to be provided to dissipate heat from the consumables inside the end of the throat tube far from the nozzle. And in order to ensure that the heat of the heating block will not be lost due to the heat dissipation block, it is usually necessary to reduce their direct contact to reduce heat transfer. However, this will cause the heating block and the heat dissipation block to be connected only through the throat tube for conveying consumables, and the structural stability cannot meet the requirements. When disassembling and assembling the nozzle and being interfered by external forces, the throat tube is prone to deformation, thus affecting the use. Based on this, the present application proposes the following embodiments to solve the above technical problems.

[0031] The following embodiments of the 3D printing device of the present application describe the exemplary structure of the 3D printing device.

[0032] As Figure 1 and Figure 2 shown, the 3D printing device 1 includes a device main body 10 and a nozzle device 20, and the nozzle device 20 is connected to the device main body 10. The device main body 10 includes a consumable conveying device 11, a loading platform 12, a motion system 13 and a controller 14, and the nozzle device 20 includes a nozzle 110.

[0033] The consumable conveying device 11 is used to convey consumables to convey the consumables to the nozzle device 20. The nozzle device 20 is used to heat the consumables into a molten state and use the nozzle 110 to eject the molten consumables to form filaments, and eject the filaments to a preset position on the loading platform 12, so as to facilitate building a preset model on the loading platform 12. The loading platform 12 is used to carry the filaments ejected by the nozzle 110 and is the place where the filaments are cooled and formed.

[0034] The motion system 13 is the basis for the 3D printing device 1 to perform three-dimensional manufacturing. The motion system 13 can drive the nozzle 110 to move on the X-axis, Y-axis, and Z-axis, so that the nozzle 110 extrudes the filaments at the corresponding positions of the preset model.

[0035] The controller 14 is used to control the operation of the consumable conveying device 11, the nozzle device 20 and the motion system 13, and is used to control the motion system 13 to move the nozzle 110 to a preset position to print a model.

[0036] As Figure 2 and Figure 3 shown, the nozzle device 20 includes a throat tube 100, a heat dissipation block 200, a nozzle 110, a heating block 300 and a heat insulation block 400.

[0037] The throat tube 100 extends along the axial direction F3 and has an internal passage for the consumable to pass through, for conveying the consumable to the nozzle 110. The heat dissipation block 200 is sleeved on the outer periphery of the throat tube 100. The nozzle 110 is arranged at one end of the throat tube 100 away from the heat dissipation block 200, for ejecting the consumable. The heating block 300 is sleeved on the outer periphery of the throat tube 100. A passage 301 is formed inside the heating block 300. The passage 301 is used for installing the nozzle 110 and the throat tube 100. The heating block 300 is used for heating the consumable inside the passage 301 at the connection position to make it in a molten state, so as to facilitate the ejection by the nozzle 110. The heating block 300 is partially spaced from the heat dissipation block 200 along the axial direction F3 of the throat tube 100, and the heat dissipation block 200 and the heating block 300 are partially opposite to each other in the first direction F1 perpendicular to the axial direction F3 of the throat tube 100. The heat insulation block 400 is fixedly connected to the heat dissipation block 200 and the heating block 300 in the second direction F2 perpendicular to the axial direction F3 of the throat tube 100.

[0038] Partially setting the heat dissipation block 200 and the heating block 300 opposite to each other in the first direction F1 perpendicular to the axial direction F3 of the throat tube 100 is beneficial to improving the space utilization rate between the two. On the basis of ensuring the overall size of the nozzle device 20, the sizes of the heat dissipation block 200 and the heating block 300 can be increased, so as to improve the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200, and is beneficial to improving the structural compactness of the nozzle device 20, thereby improving the integration of the nozzle device 20. In addition, the heat insulation block 400 fixedly connected to the heat dissipation block 200 and the heating block 300 in the second direction F2 perpendicular to the axial direction F3 of the throat tube 100 enables the two to be connected and fixed on the basis of reducing the direct contact between the heat dissipation block 200 and the heating block 300, which is different from the axial fixation in the related art and is easy to block the heat dissipation block 200 or the heating block 300. Adopting the heat insulation block 400 for fixed connection in the second direction F2 perpendicular to the axial direction F3 of the throat tube 100, on the one hand, realizes the fixed connection between the heat dissipation block 200 and the heating block 300 through the heat insulation block 400. The heat insulation block 400 can be in rigid contact with the heat dissipation block 200 and the heating block 300 respectively. At the same time, the fixed connection is realized through the second direction F2 perpendicular to the axial direction F3 of the throat tube 100, which can provide a stable rigid connection for the heat dissipation block 200 and the heating block 300, thereby improving the working stability and reliability of the nozzle device 20. On the other hand, it is not easy to block the heat dissipation block 200 or the heating block 300, which is convenient for observing them from the side, and further can improve the disassembly and assembly efficiency of the heat insulation block 400. When disassembling the heat insulation block 400, the disassembly from the heat dissipation block 200 and the heating block 300 can be realized simultaneously, further improving the disassembly and assembly efficiency. At the same time, the space occupied by the heating block 300 and the heat dissipation block 200 in the axial direction F3 can be reduced, and the influence on the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200 can be reduced.

[0039] Optionally, as Figure 3 shown, the heat sink 200 includes a heat dissipation main body 210 and an extension portion 220. The heat dissipation main body 210 is arranged at an interval from the heating block 300 along the axial direction F3 of the throat pipe 100. The extension portion 220 protrudes from the side of the heat dissipation main body 210 facing the heating block 300. The extension portion 220 and the heating block 300 are arranged opposite to each other in the first direction F1. The heat insulation block 400 is fixedly connected to the extension portion 220 and the heating block 300 respectively in the second direction F2. The number of the extension portions 220 can be one or more, for example, it can be one, two, three, four, etc. Of course, it can also be other numbers.

[0040] By providing the extension portion 220 for connection, the connection stability between the heat sink 200 and the heat insulation block 400 can be improved. Moreover, since the extension portion 220 protrudes from the heat dissipation main body 210, the heat dissipation size can be increased and the heat dissipation effect can be improved. Arranging the extension portion 220 to protrude from the side of the heat dissipation main body 210 facing the heating block 300 is also convenient for connecting with the heat insulation block 400, improving the assembly efficiency, and enabling the heat dissipation main body 210 to keep a sufficient interval from the heating block 300 without affecting each other's work. In addition, on the basis of ensuring that the size of the heat sink 200 remains unchanged, the extension portion 220 and the heating block 300 are arranged opposite to each other in the first direction F1, which can increase the size of the heating block 300 and improve the heating effect.

[0041] Optionally, as Figure 3 shown, a plurality of heat dissipation fins 211 are arranged on the heat dissipation main body 210, or a plurality of heat dissipation fins 211 are arranged on both the heat dissipation main body 210 and the extension portion 220. By providing a plurality of heat dissipation fins 211, the heat dissipation area of the heat sink 200 can be increased, thereby improving the heat dissipation effect.

[0042] The first direction F1 and the second direction F2 can be two parallel directions to each other, or two intersecting directions to each other.

[0043] According to one or more embodiments of the present application, optionally, as Figure 2 and Figure 3 shown, the first direction F1 is perpendicular to the axial direction F3 of the throat pipe 100, and the first direction F1 and the second direction F2 can intersect with each other. The heat insulation block 400 is located on the same side of the heat sink 200 and the heating block 300. The heat insulation block 400 is located on the same side of the heat sink 200 and the heating block 300, so that the heat insulation block 400 can simultaneously realize the connection with the heat sink 200 and the heating block 300, improving the disassembly and assembly efficiency.

[0044] Optionally, the number of the extensions 220 is at least two, two of the extensions 220 are opposite to each other along the first direction F1, the two extensions 220 are arranged on both sides of the heating block 300 and are spaced from the heating block 300. The heat insulation block 400 straddles the two extensions 220 and is fixedly connected to the two extensions 220, and a part of the outer peripheral wall of the heat insulation block 400 between the two extensions 220 is fixedly connected to the heating block 300.

[0045] Optionally, as Figure 2 and Figure 3 shown, an avoidance groove 401 is formed in a part of the heat insulation block 400 between the two extensions 220, the heating block 300 includes a protruding part 310 protruding from the outer peripheral side of the heat dissipation block 200 between the two extensions 220, and at least a part of the protruding part 310 is received in the avoidance groove 401. The avoidance groove 401 penetrates the heat insulation block 400 along the axial direction F3 of the nozzle 110 pipe, the protruding part 310 extends along the axial direction F3 of the nozzle 110 pipe, and penetrates through the avoidance groove 401. By providing the protruding part 310, the size of the heating block 300 can be larger, improving the heating effect, and the provision of the avoidance groove 401 can reduce the interference of the heat insulation block 400 on the heating block 300. In some embodiments, the avoidance groove 401 and the protruding part 310 can be snap-fitted and fixed, so as to further fix the heat insulation block 400 and the heating block 300, improving the connection stability and reliability of the nozzle device 20.

[0046] According to one or more embodiments of the present application, optionally, as Figure 4 shown, the first direction F1 and the second direction F2 can be parallel to each other, and at least a part of the heat insulation block 400 is located between the extension 220 and the heating block 300. By arranging at least a part of the heat insulation block 400 between the extension 220 and the heating block 300, the connection stability between the heat dissipation block 200 and the heating block 300 can be effectively improved, thereby improving the connection stability and reliability of the nozzle device 20.

[0047] Optionally, as Figure 5 shown, the heat insulation block 400 includes a relatively fixed first heat insulation part 410 and a second heat insulation part 420, the first heat insulation part 410 is fixedly connected to the heating block 300 in the second direction F2, and the second heat insulation part 420 is fixedly connected to the heat dissipation block 200 in the second direction F2. Specifically, the first heat insulation part 410 is fixedly connected to the outer peripheral wall of the heating block 300 in the second direction F2, and the second heat insulation part 420 is located on the side of the extension 220 facing the throat pipe 100 and is fixedly connected to the extension 220 in the second direction F2. By arranging the heat insulation block 400 to include the first heat insulation part 410 and the second heat insulation part 420, so as to realize the connection with the heating block 300 and the heat dissipation block 200 respectively, the heat transfer can be effectively reduced, and the heat insulation effect can be effectively improved.

[0048] Optionally, as shown in Figure 5 and Figure 6 shown, on one side of the first heat insulation part 410 facing the heating block 300, a plurality of first protrusions 411 spaced from each other are provided, and the plurality of first protrusions 411 abut against the heating block 300. On one side of the second heat insulation part 420 facing the heat dissipation block 200, a plurality of second protrusions 421 spaced from each other are provided, and the plurality of second protrusions 421 abut against the heat dissipation block 200. By providing the plurality of first protrusions 411 and the plurality of second protrusions 421, the contact area between the heat insulation block 400 and the heating block 300 and the heat dissipation block 200 can be effectively reduced, the heat loss caused by the heat conduction of the heating block 300 to the heat dissipation block 200 can be reduced, and at the same time, the possibility of poor heat dissipation caused by heat accumulation on the heat dissipation block 200 can be reduced, further improving the heat insulation effect.

[0049] Optionally, as shown in Figure 3 , Figure 5 and Figure 6 shown, the nozzle device 20 further includes a first locking assembly 700 and a second locking assembly 800. The first locking assembly 700 locks the heating block 300 and the heat insulation block 400 from the second direction F2, and the second locking assembly 800 locks the heat dissipation block 200 and the heat insulation block 400 from the second direction F2. The first locking assembly 700 and the second locking assembly 800 can be, for example, bolts, screws, rivets, etc. Of course, they can also be other connecting parts. The materials of the first locking assembly 700 and the second locking assembly 800 are high-temperature-resistant materials with low thermal conductivity, such as stainless steel or titanium alloy. By providing the first locking assembly 700 and the second locking assembly 800 to respectively realize the connection between the heat insulation block 400 and the heating block 300 and the heat dissipation block 200, the connection stability and reliability are improved on the basis of reducing heat transfer.

[0050] The connection manner between the nozzle 110 and the throat tube 100 can also be diverse. For example, they can be directly connected, or indirectly connected through other components.

[0051] According to one or more embodiments of the present application, optionally, as shown in Figure 3 and Figure 5 shown, the nozzle 110 is detachably connected to the heating block 300, one end of the throat tube 100 away from the heat dissipation block 200 is detachably connected to the heating block 300, and the nozzle 110 and the throat tube 100 are communicated through the channel 301 inside the heating block 300. The throat tube 100 and the nozzle 110 can be respectively connected to the heating block 300. For example, they can be threadedly connected, so that when one of them is damaged or fails, only it needs to be replaced separately without replacing other components, effectively reducing the maintenance cost.

[0052] According to one or more embodiments of the present application, optionally, as shown in Figure 6As shown, the nozzle 110 is fixedly connected to and communicates with one end of the throat pipe 100 away from the heat dissipation block 200. The nozzle 110 and the throat pipe 100 can be, for example, two components fixedly connected by riveting, welding, etc., or the nozzle 110 and the throat pipe 100 can be integrally connected. Fixing and connecting the nozzle 110 to one end of the throat pipe 100 away from the heat dissipation block 200 and communicating them can facilitate the transportation of the consumables in the throat pipe 100 to the nozzle 110, which is beneficial to reducing the loss of the consumables and improving the transportation efficiency of the consumables.

[0053] Optionally, as Figure 6 , Figure 7 and Figure 8 shown, the heating block 300 includes a heat conducting block 340, a heating sheet 350, and a fixing plate 360. The throat pipe 100 passes through the heat conducting block 340, and the heating sheet 350 is attached to the heat conducting block 340. The fixing plate 360 is bent to surround a part of the heat conducting block 340. The fixing plate 360 includes two elastic wall plates 364 arranged opposite to each other and a connecting wall plate 363 connected between the two elastic wall plates 364. The two elastic wall plates 364 elastically clamp both sides of the heat conducting block 340, and the heating sheet 350 is clamped between the connecting wall plate 363 and the heat conducting block 340. The heating sheet 350 is used to generate heat and transfer it to the heat conducting block 340, and the heat conducting block 340 is used to heat the consumables. A channel 301 is opened in the heat conducting block 340. The two elastic wall plates 364 can, for example, apply a certain clamping force to the heat conducting block 340, thereby improving the connection stability between the fixing plate 360 and the heat conducting block 340.

[0054] Optionally, as Figure 7 shown, the connecting wall plate 363 is provided with an avoidance hole 304 arranged opposite to the heating sheet 350. The connecting wall plate 363 is provided with an elastic support arm 361 extending in the direction of the avoidance hole 304. The elastic support arm 361 is suspended, and a part of the elastic support arm 361 is closer to the heating sheet 350 than the avoidance hole 304. The elastic support arm 361 elastically abuts against the heating sheet 350 and supports the heating sheet 350 to be attached to the heat conducting block 340. By providing the cooperation of the avoidance hole 304 and the elastic support arm 361, it is beneficial to achieve the attachment of the heating sheet 350 to the heat conducting block 340, thereby improving the heat transfer effect of the heat of the heating sheet 350 to the heat conducting block 340, and the setting of the avoidance hole 304 can reduce the contact between the fixing plate 360 and the heating sheet 350, thereby reducing heat loss.

[0055] Optionally, as Figure 7 and Figure 8As shown, on the side edges of the two elastic wall plates 364 away from the connecting wall plate 363, there are fastening portions 362 provided. On the opposite sides of the heat conducting block 340, there are fastening grooves 305 opened. The fastening portions 362 are embedded in the fastening grooves 305. By setting the cooperation between the fastening portions 362 and the fastening grooves 305, the connection method is simple, convenient for loading and unloading, and can improve the connection stability between the fixing plate 360 and the heat conducting block 340.

[0056] Optionally, as Figure 8 shown, the heat conducting block 340 is provided with a receiving groove 306. The heating sheet 350 is received in the receiving groove 306 and is attached to the bottom surface of the receiving groove 306. By setting the receiving groove 306, a better fit between the heating sheet 350 and the heat conducting block 340 can be achieved, thereby improving the heat conduction effect, and further improving the heating effect of the heating block 300 on the consumables, which is beneficial to improving the stability and reliability of the operation of the nozzle device 20.

[0057] Furthermore, as Figure 6 、 Figure 9 、 Figure 10 and Figure 11 shown, the nozzle device 20 further includes a tension adjustment mechanism 500. The tension adjustment mechanism 500 is movably connected to the heating block 300 and can move relative to the heating block 300 to drive the heating block 300 to switch between a first state and a second state by moving relative to the heating block 300. As Figure 10 shown, the heating block 300 clamps the throat tube 100 in the first state to be fixed to the throat tube 100, and as Figure 11 shown, in the second state, it releases the throat tube 100 to allow the throat tube 100 and the nozzle 110 to be separated from the heating block 300. By setting the tension adjustment mechanism 500, the loading and unloading of the throat tube 100 and the nozzle 110 can be realized only by switching the first state and the second state of the heating block 300, effectively improving the loading and unloading efficiency of the throat tube 100 and the nozzle 110.

[0058] Specifically, the tension adjustment mechanism 500 is set to adjust the radial dimension of the channel 301 to change between a first dimension and a second dimension by moving relative to the heating block 300. The heating block 300 is in the first state when the radial dimension of the channel 301 is the first dimension, and releases the throat tube 100 when the radial dimension of the channel 301 is the second dimension to allow the throat tube 100 and the nozzle 110 to be separated from the heating block 300. The first dimension is smaller than the second dimension.

[0059] Optionally, as Figure 8As shown, the heating block 300 includes a heating part 320 and two elastic limiting arms 330 connected to the heating part 320. Specifically, the heat conducting block 340 includes a heating part 320 and two elastic limiting arms 330 connected to the heating part 320. A channel 301 is formed in the heating part 320, and the heating part 320 has two end sides 370 with an unclosed connection in the direction around the channel 301. The two elastic limiting arms 330 are respectively connected to the two end sides 370 of the heating part 320, extend away from the heating part 320 and are oppositely arranged. The tightness adjusting mechanism 500 drives relative movement between the two elastic limiting arms 330 by moving relative to the heating block 300, so that the heating block 300 switches between a first state and a second state.

[0060] Optionally, as Figure 12 , Figure 13 and Figure 14 shown, the tightness adjusting mechanism 500 includes two clamping arms 510 arranged oppositely, and the two clamping arms 510 are relatively fixed. The two clamping arms 510 can move between a clamping position and a loosening position relative to the two elastic limiting arms 330, so that the heating block 300 switches between a first state and a second state, and the radial dimension of the channel 301 switches between a first dimension and a second dimension. As Figure 13 shown, in the clamping position, the two clamping arms 510 clamp on the outer sides of the two elastic limiting arms 330, and press the two elastic limiting arms 330 towards each other between the two clamping arms 510, so that the heating block 300 is in the first state, and the radial dimension of the channel 301 is the first dimension, thereby clamping the throat tube 100; as Figure 14 shown, in the loosening position, the two clamping arms 510 are disengaged from the two elastic limiting arms 330, so that the heating block 300 is in the second state, and the radial dimension of the channel 301 is the second dimension, thereby loosening the throat tube 100. The distance between the two elastic limiting arms 330 in the first state is less than that in the second state. By providing the two clamping arms 510, the clamping and loosening of the throat tube 100 are realized by switching the clamping position and the loosening position of the two clamping arms 510 relative to the two elastic limiting arms 330, thereby reducing the loading and unloading difficulty between the throat tube 100 and the nozzle 110 and improving the loading and unloading efficiency.

[0061] Optionally, as Figure 6 and Figure 12As shown, the tightening and loosening adjustment mechanism 500 includes a rotating shaft 520 and two rotating arms 530. The two rotating arms 530 are respectively connected to the two clamping arms 510, and the rotating shaft 520 is connected between the two rotating arms 530. The heating block 300 is provided with a rotating shaft hole 303 that penetrates through the two elastic limiting arms 330. The rotating shaft 520 is inserted into the rotating shaft hole 303, and the two rotating arms 530 are located outside the two elastic limiting arms 330. The two rotating arms 530 drive the two clamping arms 510 to rotate between the clamping position and the loosening position through the rotating shaft 520. By rotating to switch between the clamping position and the loosening position, the operation is convenient, the switching difficulty is effectively reduced, thereby reducing the loading and unloading difficulty between the throat tube 100 and the nozzle 110, and improving the loading and unloading efficiency.

[0062] In some embodiments, the minimum distance between the two clamping arms 510 is less than the distance between the opposite sides of the two elastic limiting arms 330, and the distance between the two rotating arms 530 is greater than the distance between the opposite sides of the two elastic limiting arms 330. That is, the rotating arms 530 do not apply a clamping force to the two elastic limiting arms 330, and only when the two clamping arms 510 rotate to the clamping position, a clamping force is applied to the two elastic limiting arms 330, which is convenient for the throat tube 100 and the nozzle 110 to be loaded and unloaded smoothly in the loosening position.

[0063] In some embodiments, the distance between the two rotating arms 530 gradually decreases in the direction of the two clamping arms 510. In some embodiments, the distance between the two clamping arms 510 gradually decreases in the direction away from the two rotating arms 530. In some embodiments, the distance between the two rotating arms 530 gradually decreases in the direction of the two clamping arms 510, and the distance between the two clamping arms 510 gradually decreases in the direction away from the two rotating arms 530. By setting the distance between the two clamping arms 510 to gradually decrease in the direction away from the two rotating arms 530, it is possible to gradually clamp the two elastic limiting arms 330 when the two clamping arms 510 are switched from the loosening position to the clamping position relative to the two elastic limiting arms 330, which is convenient for improving the reliability of the switching and reducing the possibility of structural damage caused by the switching.

[0064] Optionally, as Figure 6 and Figure 12 shown, the tightening and loosening adjustment mechanism 500 includes a handle 540. The handle 540 is fixedly connected to one side of the two clamping arms 510 and the two rotating arms 530, and extends beyond the clamping arms 510 along the direction in which the rotating arms 530 are away from the clamping arms 510. The handle 540 is used to drive the rotating arms 530 to rotate. The end of the handle 540 away from the rotating arms 530 is provided with anti-slip patterns 550. By providing the handle 540 and setting the anti-slip patterns 550 on the handle 540, it is convenient for the user to use the handle 540 to rotate the two clamping arms 510 and the two rotating arms 530, thereby reducing the loading and unloading difficulty between the throat tube 100 and the nozzle 110 and improving the loading and unloading efficiency.

[0065] Optionally, as Figure 15 and Figure 16 shown, the outer peripheral surface of the throat tube 100 includes an annular fitting surface 101 and an annular sunk surface 102 located within the heat dissipation block 200. The annular fitting surface 101 and the annular sunk surface 102 are arranged at intervals, and the radial dimension of the annular sunk surface 102 is smaller than that of the annular fitting surface 101. The annular fitting surface 101 is arranged in contact with the heat dissipation block 200, and the annular sunk surface 102 and the heat dissipation block 200 are opposite to each other and arranged at intervals. The nozzle device 20 includes a locking member 600. The locking member 600 passes through the heat dissipation block 200 and abuts against the sunk surface to tightly hold the throat tube 100. By providing the locking member 600, the throat tube 100 can be further fixed, effectively improving the connection stability and reliability of the nozzle 110 assembly. The annular sunk surface 102 for connecting with the locking member 600 and the annular fitting surface 101 for fitting with the heat dissipation member are respectively provided, so that when the locking member 600 presses the annular sunk surface 102 and causes partial deformation of the annular sunk surface 102, since the radial dimension of the annular sunk surface 102 is smaller than that of the annular fitting surface 101, it is not easy to get stuck when the throat tube 100 is loaded and unloaded, improving the loading and unloading efficiency of the throat tube 100. The annular sunk surface 102 arranged in an annular shape can make it not necessary to limit that the locking member 600 must abut against a specific position, effectively improving the freedom degree of installation of the throat tube 100 and the assembly efficiency.

[0066] Optionally, as Figure 2 and Figure 17 shown, the heat dissipation block 200 and the heating block 300 are partially arranged opposite to each other in the first direction F1 perpendicular to the axial direction F3 of the throat tube 100, which is beneficial to improving the space utilization rate between the two. On the basis of ensuring the overall size of the nozzle device 20, the sizes of the heat dissipation block 200 and the heating block 300 can be increased, thereby improving the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200, and being beneficial to improving the structural compactness of the nozzle device 20, thus improving the integration of the nozzle device 20.

[0067] In summary, by providing the nozzle device 20 including a throat tube 100, a heat dissipation block 200, a nozzle 110, a heating block 300, and a heat insulation block 400, wherein the heating block 300 is sleeved on the outer periphery of one end of the throat tube 100 close to the nozzle 110 to heat the consumable material in the channel 301, so that the consumable material becomes in a molten state for facilitating the nozzle 110 to eject the consumable material, and the heat dissipation block 200 is sleeved on the outer periphery of the throat tube 100 for heat dissipation, thereby reducing the possibility of the situation that too much consumable material is heated to the molten state and blocks the nozzle 110. And by partially spacing the heating block 300 along the axial direction F3 of the throat tube 100 from the heat dissipation block 200, the direct contact between the heating block 300 and the heat dissipation block 200 can be reduced, thereby reducing the heat loss of the heating block 300, effectively improving the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200, and thus improving the printing effect of the 3D printing device 1. Partially arranging the heat dissipation block 200 and the heating block 300 opposite to each other in the first direction F1 perpendicular to the axial direction F3 of the throat tube 100 is beneficial to improving the space utilization rate therebetween. On the basis of ensuring the overall size of the nozzle device 20, the sizes of the heat dissipation block 200 and the heating block 300 can be increased, thereby improving the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200, and being beneficial to improving the structural compactness of the nozzle device 20, and thus improving the integration of the nozzle device 20. In addition, by providing the heat insulation block 400 fixedly connected to the heat dissipation block 200 and the heating block 300 in the second direction F2 perpendicular to the axial direction F3 of the throat tube 100, the heat dissipation block 200 and the heating block 300 can be connected and fixed on the basis of reducing their direct contact. Different from the axial fixation in the related art which is likely to block the heat dissipation block 200 or the heating block 300, by using the heat insulation block 400 for fixed connection in the second direction F2 perpendicular to the axial direction F3 of the throat tube 100, on the one hand, it is not easy to block the heat dissipation block 200 or the heating block 300, facilitating the lateral observation thereof, and thus the disassembly and assembly efficiency of the heat insulation block 400 can be improved. On the other hand, when disassembling the heat insulation block 400, the disassembly from both the heat dissipation block 200 and the heating block 300 can be realized simultaneously, further improving the disassembly and assembly efficiency. At the same time, the space occupied by the heat dissipation block 200 and the heating block 300 in the axial direction F3 can be reduced, reducing the influence on the heating effect of the heating block 300 and the heat dissipation effect of the heat dissipation block 200, thereby improving the working stability and reliability of the nozzle device 20. Moreover, the heat insulation block 400 can provide a stable rigid connection for the heat dissipation block 200 and the heating block 300, improving the structural stability.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A spray head device, characterized in that, Comprising: A throat tube extending axially, which has an internal passage for a consumable to pass through; A heat dissipation block sleeved on the outer periphery of the throat tube; A nozzle arranged at one end of the throat tube away from the heat dissipation block for ejecting the consumable; A heating block sleeved on the outer periphery of the throat tube, a passage is formed inside the heating block, and the passage is used to install the nozzle and the throat tube; the heating block is partially spaced from the heat dissipation block along the axial direction of the throat tube, and the heat dissipation block and the heating block are partially opposite to each other in a first direction perpendicular to the axial direction of the throat tube; and, A heat insulation block fixedly connected to the heat dissipation block and the heating block in a second direction perpendicular to the axial direction of the throat tube.

2. The spray head device according to claim 1, characterized in that, The heat dissipation block includes a heat dissipation main body and an extension portion. The heat dissipation main body is spaced from the heating block along the axial direction of the throat tube. The extension portion protrudes from the side of the heat dissipation main body facing the heating block; the extension portion is opposite to the heating block in the first direction; the heat insulation block is fixedly connected to the extension portion and the heating block respectively in the second direction.

3. The spray head device according to claim 2, characterized in that, The first direction is perpendicular to the axial direction of the throat tube, and the first direction and the second direction intersect with each other. The heat insulation block is located on the same side of the heat dissipation block and the heating block.

4. The spray head device according to claim 3, characterized in that, The number of the extension portions is at least two, and two of the extension portions are opposite to each other in the first direction. The two extension portions are arranged on both sides of the heating block and are spaced from the heating block; the heat insulation block straddles the two extension portions and is fixedly connected to the two extension portions; a part of the outer peripheral wall of the heat insulation block located between the two extension portions is fixedly connected to the heating block.

5. The spray head device according to claim 2, characterized in that, The first direction and the second direction are parallel to each other; at least a part of the heat insulation block is located between the extension portion and the heating block.

6. The spray head device according to claim 5, characterized in that, The heat insulation block includes a relatively fixed first heat insulation portion and a second heat insulation portion. The first heat insulation portion is fixedly connected to the outer peripheral wall of the heating block in the second direction; the second heat insulation portion is located on the side of the extension portion facing the throat tube and is fixedly connected to the extension portion in the second direction.

7. The spray head device according to claim 2, characterized in that, A plurality of heat dissipation fins are arranged on the heat dissipation main body; or, a plurality of heat dissipation fins are arranged on both the heat dissipation main body and the extension portion.

8. The spray head device according to claim 1, characterized in that, The nozzle device further includes a first locking assembly and a second locking assembly. The first locking assembly locks the heating block and the heat insulation block from the second direction; the second locking assembly locks the heat dissipation block and the heat insulation block from the second direction.

9. The spray head device according to claim 1, characterized in that, The nozzle is detachably connected to the heating block, one end of the throat tube away from the heat dissipation block is detachably connected to the heating block, and the nozzle and the throat tube are communicated through the passage inside the heating block.

10. The spray head device according to claim 1, characterized in that, The nozzle is fixedly connected and communicated with one end of the throat tube away from the heat dissipation block.

11. The spray head device according to claim 10, characterized in that, The heating block includes a heat-conducting block, a heating sheet, and a fixing plate. The throat tube passes through the heat-conducting block, and the heating sheet is attached to the heat-conducting block. The fixing plate is bent to surround a part of the heat-conducting block. The fixing plate includes two elastic wall plates arranged opposite to each other and a connecting wall plate connected between the two elastic wall plates. The two elastic wall plates elastically clamp both sides of the heat-conducting block, and the heating sheet is clamped between the connecting wall plate and the heat-conducting block.

12. The spray head device according to claim 11, characterized in that, The connecting wall plate is provided with an avoidance hole arranged opposite to the heating sheet. The connecting wall plate is provided with an elastic support arm extending in the direction of the avoidance hole. The elastic support arm is suspended, and a part of the elastic support arm is closer to the heating sheet than the avoidance hole. The elastic support arm elastically abuts against the heating sheet and supports the heating sheet to be attached to the heat-conducting block.

13. The spray head device according to claim 12, characterized in that, One side edge of the two elastic wall plates away from the connecting wall plate is provided with a fastening portion. Fastening grooves are formed on opposite sides of the heat-conducting block, and the fastening portion is embedded in the fastening groove; and / or, the heat-conducting block is provided with a receiving groove, the heating sheet is received in the receiving groove and is attached to the bottom surface of the receiving groove.

14. The spray head device according to claim 10, characterized in that, The nozzle device further includes a tightening and loosening adjustment mechanism. The tightening and loosening adjustment mechanism is movably connected to the heating block and can move relative to the heating block to drive the heating block to switch between a first state and a second state by moving relative to the heating block. The heating block clamps the throat tube in the first state to be fixed to the throat tube; in the second state, the throat tube is loosened to allow the throat tube and the nozzle to separate from the heating block.

15. The spray head device according to claim 14, characterized in that, The tightening and loosening adjustment mechanism is configured to adjust the radial dimension of the channel to vary between a first dimension and a second dimension by moving relative to the heating block. The heating block is in the first state when the radial dimension of the channel is the first dimension, and loosens the throat tube when the radial dimension of the channel is the second dimension to allow the throat tube and the nozzle to separate from the heating block.

16. The spray head device according to claim 14 or 15, characterized in that, The heating block includes a heating portion and two elastic limiting arms connected to the heating portion. The channel is formed in the heating portion, and the heating portion has two end sides with an unclosed connection along the direction surrounding the channel. The two elastic limiting arms are respectively connected to the two end sides of the heating portion and extend away from the heating portion and are arranged opposite to each other. The tightening and loosening adjustment mechanism drives relative movement between the two elastic limiting arms by moving relative to the heating block, so that the heating block switches between the first state and the second state.

17. The spray head device according to claim 16, characterized in that, The tightening and loosening adjustment mechanism includes two clamping arms arranged oppositely, and the two clamping arms are relatively fixed; the two clamping arms can move between a clamping position and a loosening position relative to the two elastic limiting arms; in the clamping position, the two clamping arms are clamped outside the two elastic limiting arms, and press the two elastic limiting arms towards each other between the two clamping arms, so that the heating block is in the first state; in the loosening position, the two clamping arms are separated from the two elastic limiting arms, so that the heating block is in the second state; the distance between the two elastic limiting arms in the first state is smaller than the distance in the second state.

18. The spray head device according to claim 17, characterized in that, The tightening and loosening adjustment mechanism includes a rotating shaft and two rotating arms, and the two rotating arms are respectively connected to the two clamping arms; the rotating shaft is connected between the two rotating arms; the heating block is provided with a rotating shaft hole passing through the two elastic limiting arms, the rotating shaft is arranged in the rotating shaft hole, and the two rotating arms are located outside the two elastic limiting arms; the two rotating arms drive the two clamping arms to rotate between the clamping position and the loosening position through the rotating shaft.

19. The spray head device according to claim 1, characterized in that, The outer peripheral surface of the throat tube includes an annular fitting surface and an annular sunk groove surface located in the heat dissipation block, the annular fitting surface and the annular sunk groove surface are arranged at intervals, and the radial dimension of the annular sunk groove surface is smaller than the radial dimension of the annular fitting surface; the annular fitting surface is arranged in fit with the heat dissipation block, and the annular sunk groove surface and the heat dissipation block are opposite and arranged at intervals; the nozzle device includes a locking member, and the locking member passes through the heat dissipation block and abuts against the sunk groove surface to tightly hold the throat tube.

20. A 3D printing device, characterized in that, Comprising: The nozzle device according to any one of claims 1-19; A consumable conveying device for conveying a consumable into the throat tube and spraying it out through the nozzle.

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