Spray head device, printing head and 3D printing equipment

Abstract

The utility model provides a spray head device, a printing head and 3D printing equipment, the spray head device is provided with a feeding end and a discharging end, the spray head device comprises a heating assembly and a switching assembly, the heating assembly is provided with a defined first axis, and the heating assembly is provided with a plurality of first material channels; the switching assembly comprises a rotating part, and the rotating part is rotatably connected to the end, close to the discharging end, of the heating assembly around the first axis. And the rotating part is provided with a discharging port, and the rotating part is configured to rotate relative to the heating assembly, so that the discharging port selectively communicates with one of the first material channels. Thus, the nozzle device can heat the consumables in the multiple first material channels through the single heating assembly, the first material channels communicating with the discharging port can be switched through rotation of the rotating piece, and switching of the consumables is achieved.

Description

Technical Field

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

[0002] Most multi-color FDM (Fused Deposition Modeling) 3D printers are equipped with multiple nozzles, each of which is connected to an extrusion channel of a color of consumables, and each nozzle is provided with a heating structure, resulting in a larger print head and higher cost for the 3D printer. Utility Model Content

[0003] The present application provides a nozzle device, a print head and a 3D printing device to solve the problem that the print head of a 3D printer in the prior art is large in size and high in cost.

[0004] In a first aspect, the present application provides a nozzle device, the nozzle device having a feed end and a discharge end, the nozzle device including a heating component and a switching component, the heating component having a defined first axis, the heating component being provided with a plurality of first material channels; the switching component including a rotating member, the rotating member being rotatably connected to an end of the heating component close to the discharge end about the first axis; wherein a discharge port is provided on the rotating member, the rotating member being configured to rotate relative to the heating component so that the discharge port is selectively connected to one of the first material channels.

[0005] In a possible implementation, the heating component includes:

[0006] A heat conducting member, provided with a plurality of said first material channels;

[0007] The heating element is sleeved on the outer side of the heat-conducting element, and the heating element is thermally coupled with the heat-conducting element to transfer heat to the heat-conducting element.

[0008] In a possible implementation manner, a mounting groove is provided at one end of the heat conducting member close to the rotating member, and the first material channel is connected to the mounting groove;

[0009] A rotating protrusion is provided at one end of the rotating member close to the heat conducting member, the discharge port passes through the rotating protrusion, the rotating protrusion is rotatably arranged in the mounting groove, and the rotating protrusion abuts against the bottom wall of the mounting groove to enable the discharge port to dock with the first material channel.

[0010] In a possible implementation, the nozzle device further includes a detection member, and the detection member is configured to detect status information of the rotating member and / or the rotating protrusion to determine the position of the discharge port.

[0011] In a possible implementation manner, the nozzle device further includes a heat sink, and the heat sink is thermally coupled to the heat conductive member so that the heat conductive member transfers heat to the heat sink;

[0012] The heat dissipation element is provided with a plurality of second material channels, and each of the second material channels is connected to a corresponding first material channel.

[0013] In a possible implementation, the switching assembly further includes a rotating shaft and a driving member, the rotating shaft passes through the heat sink and the heat conductor, two ends of the rotating shaft are respectively connected to the driving member and the rotating member, and the driving member drives the rotating shaft to drive the rotating member to rotate.

[0014] In a possible implementation manner, the nozzle device further includes a connecting member, wherein the connecting member is located between the heat sink and the heat conductor, and the connecting member connects the heat sink and the heat conductor.

[0015] In a possible implementation manner, a connecting channel is provided on the connecting member, and the connecting channel is connected to the first channel and the second channel respectively.

[0016] In a possible embodiment, the heat sink and the heat conductor are spaced apart, and the connecting member includes a first section, a second section, and a third section connected in sequence, the first section is connected to the first material channel, the second section is located between the heat sink and the heat conductor, and the third section is arranged in the second material channel.

[0017] In a possible implementation manner, the outer diameter of the second section is smaller than the outer diameters of the first section and the third section.

[0018] In a second aspect, an embodiment of the present application further provides a print head, comprising an extrusion device and the above-mentioned nozzle device, wherein the nozzle device is connected to the extrusion device and is used to receive consumables extruded by the extrusion device.

[0019] In a third aspect, an embodiment of the present application further provides a 3D printing device, comprising a support frame, and the nozzle device or the print head as described above, wherein the print head is movably connected to the support frame.

[0020] The nozzle device of the present application, by providing multiple first material channels on the heating component, enables a single heating component to heat multiple first material channels, thereby avoiding the high cost of the entire nozzle device caused by providing a heating component for each color of consumables. In addition, the discharge port is provided on the rotating member, and the rotating member can rotate relative to the heating component to achieve the discharge port and different first material channels to receive consumables of different colors, thereby simplifying the structure of the nozzle device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the nozzle device of the present application in one embodiment.

[0022] Figure 2 for Figure 1 A schematic cross-sectional view of the nozzle device along the II-II direction in one embodiment.

[0023] Figure 3 for Figure 1 Schematic diagram of an explosion of the nozzle device in one embodiment.

[0024] Figure 4 for Figure 1 An exploded schematic diagram of the nozzle device in another perspective of one embodiment.

[0025] Figure 5 for Figure 1 A schematic top view of the rotating shaft of the nozzle device in one embodiment.

[0026] Figure 6 for Figure 1 A schematic diagram of the relative positions of the rotating shaft and the detection member of the nozzle device in one embodiment.

[0027] Figure 7 FIG. 1 is a schematic diagram of the structure of a print head of the present application in one embodiment.

[0028] Figure 8 This is a schematic diagram of the structure of a 3D printing device in one embodiment of the present application.

[0029] Description of main component symbols:

[0030] 3D printing equipment 300

[0031] Print head 200

[0032] Sprinkler device 100

[0033] Feed end Z1

[0034] Discharge end Z2

[0035] The first axis Z

[0036] First step surface P1

[0037] Second step surface P2

[0038] Heating element 1

[0039] Heat conducting parts 11

[0040] First channel 110

[0041] First District 1101

[0042] Second District 1102

[0043] Internal thread 1103

[0044] Mounting slot 111

[0045] Limiting part 112

[0046] First perforation 113

[0047] Heating element 12

[0048] Switch component 2

[0049] Rotating member 20

[0050] Discharge port 21

[0051] Rotating protrusion 22

[0052] Nozzle part 23

[0053] Heat sink 30

[0054] Main body 31

[0055] Second material channel 310

[0056] Third District 3101

[0057] Fourth District 3102

[0058] The second through hole 311

[0059] Heat dissipation unit 32

[0060] Cooling channel 33

[0061] Connector 40

[0062] First section 41

[0063] Second section 42

[0064] Third section 43

[0065] Connecting channel 44

[0066] External thread 45

[0067] Rotating shaft 50

[0068] Extension 51

[0069] Driving member 60

[0070] Lever 61

[0071] Extrusion device 70

[0072] Support frame 80

[0073] Detection 90

[0074] Signal transmitter 91

[0075] Signal receiving element 92

[0076] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0077] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0078] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0079] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0080] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0081] like Figure 1 to Figure 2 As shown, this embodiment provides a nozzle device 100, which has a feed end Z1 and a discharge end Z2. The feed end Z1 and the discharge end Z2 are opposite ends of the nozzle device 100. The consumables enter the nozzle device 100 from the side where the feed end Z1 is located, and the nozzle device 100 heats the consumables and then sends the consumables out from the side where the discharge end Z2 is located.

[0082] The nozzle device 100 includes a heating component 1 and a switching component 2 .

[0083] The heating assembly 1 has a first axis Z, and is provided with a plurality of first channels 110, which are respectively used to convey consumables of different colors or materials. The extension direction of the first channel 110 is parallel to the direction of the first axis Z, and the first channel 110 passes through the heating assembly 1.

[0084] The switching assembly 2 includes a rotating member 20, and a discharge port 21 is provided on the rotating member 20. The discharge port 21 is used to connect to one of the plurality of first material channels 110 to receive the consumables transported from the first material channel 110. The rotating member 20 is rotatably connected to one end of the heating assembly 1 close to the discharge end Z2 around the first axis Z, so that the discharge port 21 selectively connects to one of the first material channels 110, so that the discharge port 21 is connected to different first material channels 110 by driving the rotating member 20 to rotate, so as to realize the discharge of consumables of the desired color or material.

[0085] Thus, the nozzle device 100 of the present application, by opening multiple first material channels 110 on the heating component 1, enables a single heating component 1 to heat multiple first material channels 110, thereby avoiding the high cost of the entire nozzle device 100 caused by setting a heating component 1 for each color of consumables. In addition, the discharge port 21 is opened on the rotating member 20, and the rotating member 20 can rotate relative to the heating component 1, so that the discharge port 21 can receive consumables of different colors after cooperating with different first material channels 110, thereby simplifying the structure of the nozzle device 100.

[0086] Please combine again Figures 2 to 4 In one embodiment, the heating component 1 includes a heat conducting element 11 and a heating element 12 .

[0087] The heat conducting member 11 is a cylindrical structure, and the axis of the heat conducting member 11 coincides with the first axis Z. The heat conducting member 11 is provided with a plurality of first channels 110, and the first channels 110 extend inward from the end surface of one end of the heat conducting member 11 and penetrate the heat conducting member 11. The number of the first channels 110 is four or six, and the plurality of first channels 110 are arranged at equal intervals around the first axis Z. It is understandable that the number and arrangement of the first channels 110 can be adjusted according to actual design requirements.

[0088] The heat conducting member 11 can be made of a metal material having a heat conducting function, such as aluminum or copper.

[0089] The heating element 12 is a circular ring structure, and the heating element 12 is sleeved on the outside of the heat conductive element 11. The heating element 12 is thermally coupled with the heat conductive element 11 to transfer heat to the heat conductive element 11. Specifically, the inner circumference of the heating element 12 abuts against the outer circumference of the heat conductive element 11, so that after the heat conductive element 11 contacts the heating element 12, the heating element 12 heats the heat conductive element 11. The heating element 12 can realize its heating function by providing a heating coil or the like.

[0090] Please combine again Figures 2 to 4 In one embodiment, a mounting groove 111 is formed at one end of the heat conducting member 11 close to the rotating member 20. A limiting portion 112 is formed on the bottom wall of the mounting groove 111. The limiting portion 112 is located at the center of the mounting groove 111, and the axis of the limiting portion 112 coincides with the first axis Z.

[0091] The rotating member 20 is a disc-shaped structure, and a rotating protrusion 22 is convexly provided at one end of the rotating member 20 close to the heat-conducting member 11. The rotating protrusion 22 is located at the center of the rotating member 20, and the axis of the rotating protrusion 22 coincides with the first axis Z. The rotating protrusion 22 is a circular ring-shaped structure, and the rotating protrusion 22 is rotatably arranged in the installation groove 111, and is wrapped around the outer periphery of the limiting portion 112. The inner peripheral surface of the rotating protrusion 22 abuts against the outer peripheral surface of the limiting portion 112, and the outer peripheral surface of the rotating protrusion 22 abuts against the inner peripheral wall of the installation groove 111, so as to ensure that the rotating protrusion 22 does not deviate when rotating.

[0092] In particular, the height of the limiting portion 112 , the depth of the mounting groove 111 , and the height of the rotating protrusion 22 are kept consistent, ensuring that no gap exists between the rotating member 20 and the heat conducting member 11 when the rotating member 20 and the heat conducting member 11 are installed.

[0093] Furthermore, the discharge port 21 passes through the rotating protrusion 22 and the rotating part 20, and the first material channel 110 is connected to the installation groove 111, and the end face of the rotating protrusion 22 at one end away from the rotating part 20 abuts against the bottom wall of the installation groove 111, so that the discharge port 21 is connected to the first material channel 110, and there is no gap at the connection point between the discharge port 21 and the first material channel 110 to cause consumables to overflow.

[0094] In addition, a nozzle portion 23 is provided at one end of the rotating member 20 away from the heat conducting member 11 . The nozzle portion 23 is connected to the discharge port 21 , so that the consumables in the discharge port 21 can flow directly to the nozzle portion 23 and be guided to a desired position through the nozzle portion 23 .

[0095] Please combine again Figures 2 to 4 In one embodiment, the nozzle device 100 further includes a heat sink 30. The heat sink 30 is made of metal such as copper or aluminum. Along the direction of the first axis Z, the heat sink 30 is connected to an end of the heat conducting member 11 away from the rotating member 20, and is thermally coupled to the heat conducting member 11, so that the heat sink 30 receives part of the heat of the heat conducting member 11 and then dissipates the heat, thereby preventing excessive temperature from affecting the structure above the heat sink 30 or outside the region.

[0096] The heat sink 30 includes a main body 31 and a plurality of heat sinks 32. The main body 31 is a columnar structure, and the axis of the main body 31 coincides with the first axis Z. The main body 31 is provided with a plurality of second channels 310, and the plurality of second channels 310 are arranged at equal intervals around the axis of the main body 31. The extension direction of the second channels 310 is parallel to the direction of the first axis Z, and the second channels 310 pass through the main body 31.

[0097] The plurality of second channels 310 are arranged corresponding to the plurality of first channels 110, and each of the plurality of second channels 310 is respectively connected to each of the plurality of first channels 110, so that the consumables enter the first channel 110 from the second channel 310, and then enter the discharge port 21 from the first channel 110. In addition, each second channel 310 can be connected to the extrusion device 70 (specifically, as shown in FIG. 1 ) through a throat (not shown). Figure 7 As shown) so that the extrusion device 70 can transport the consumables into the second material channel 310 through the throat.

[0098] Along the direction of the first axis Z, a plurality of heat dissipation parts 32 are connected to the outside of the main body 31 at intervals, and the plurality of heat dissipation parts 32 are integrally formed with the main body 31. The heat dissipation parts 32 are sheet-like structures, and a heat dissipation channel 33 is formed between any two adjacent heat dissipation parts 32. When the main body 31 receives heat transferred from the heat-conducting member 11, the main body 31 transfers the heat to the heat dissipation parts 32, and when the cold air flows through the heat dissipation channel 33, it contacts the heat dissipation parts 32 and takes away the heat from the heat dissipation parts 32.

[0099] Please combine again Figures 2 to 4 In one embodiment, the heat sink 30 and the heat conductor 11 are spaced apart to prevent the heat conductor 11 from directly contacting the heat sink 30 and taking away a large amount of heat from the heat conductor 11, resulting in insufficient heating of the consumables in the first material channel 110 opened on the heat conductor 11. The nozzle device 100 also includes a connecting member 40. The extending direction of the connecting member 40 is parallel to the direction of the first axis Z, and is located between the heat sink 30 and the heat conductor 11. The connecting member 40 connects the heat sink 30 and the heat conductor 11 to improve the connection rigidity between the heat sink 30 and the heat conductor 11.

[0100] In addition, the connecting member 40 is provided with a connecting channel 44, and the extending direction of the connecting channel 44 is parallel to the direction of the first axis Z. The connecting channel 44 runs through the connecting member 40, so that when the connecting member 40 connects the heat sink 30 and the heat conductor 11, the opposite ends of the connecting channel 44 are connected to the first channel 110 and the second channel 310 respectively.

[0101] Specifically, along the extension direction of the connecting member 40, the connecting member 40 includes a first section 41, a second section 42, and a third section 43 connected in sequence. The first section 41, the second section 42, and the third section 43 are integrally formed, and the connecting channel 44 passes through the first section 41, the second section 42, and the third section 43 in sequence.

[0102] The first section 41, the second section 42, and the third section 43 are all cylindrical structures. The first section 41 is connected to the first material channel 110, the second section 42 is located between the heat sink 30 and the heat conductor 11, and the third section 43 is disposed in the second material channel 310, and the third section 43 can be clamped in the second material channel 310 by means of interference fit or the like.

[0103] The first section 41 is fully extended into the first material channel 110, the third section 43 is fully extended into the second material channel 310, and the extension length of the second section 42 is the same as the spacing between the heat sink 30 and the heat conductor 11, so that only the second section 42 is exposed to the air between the heat sink 30 and the heat conductor 11, avoiding that the section of the connector 40 exposed to the air is too long, resulting in excessive heat loss of the heat conductor 11 and affecting the heating of the consumables.

[0104] In particular, the outer diameter of the second section 42 is smaller than the outer diameters of the first section 41 and the third section 43, and the extension length of the second section 42 is smaller than the extension lengths of the first section 41 and the third section 43, further reducing the area of ​​the second section 42 exposed to the air, thereby preventing the heat of the heat conductor 11 from losing too quickly. In addition, the outer diameter of the second section 42 is smaller than the outer diameters of the first section 41 and the third section 43, which can reduce the transfer of heat from the heat conductor 11 to the heat sink 30, thereby maintaining the high temperature of the heat conductor 11.

[0105] Furthermore, the first channel 110 includes a first section 1101 and a second section 1102 which are connected in sequence. One end of the first section 1101 is connected to the mounting groove 111, and the other end of the first section 1101 is connected to the second section 1102. One end of the second section 1102 away from the first section 1101 passes through the top surface of the heat conducting member 11.

[0106] The inner diameter of the first section 1101 is smaller than the inner diameter of the second section 1102, so that a first step surface P1 is formed between the first section 1101 and the second section 1102. The first section 41 is completely located in the second section 1102, and the first section 41 can be clamped in the second section 1102 by interference fit or the like. The first section 41 is held against the first step surface P1, so that the connecting channel 44 is butted against the second section 1102, ensuring that there is no gap between the connecting channel 44 and the second section 1102.

[0107] In particular, the outer circumference of the first section 41 is provided with an external thread 45 , and the inner circumference of the second section 1102 is provided with an internal thread 1103 , so that the first section 41 is connected to the second section 1102 by threaded connection.

[0108] The second material channel 310 includes a third section 3101 and a fourth section 3102 which are connected in sequence. One end of the third section 3101 passes through the bottom end surface of the main body 31, and the other end of the third section 3101 is connected to the fourth section 3102. One end of the fourth section 3102 away from the third section 3101 passes through the top end surface of the main body 31 and is used to receive consumables.

[0109] The inner diameter of the third section 3101 is greater than the inner diameter of the fourth section 3102, so that a second step surface P2 is formed between the third section 3101 and the fourth section 3102. The third section 43 is completely located in the third section 3101, and the third section 43 abuts against the second step surface P2, so that the connecting channel 44 and the fourth section 3102 are connected to each other, ensuring that there is no gap between the connecting channel 44 and the fourth section 3102.

[0110] Please combine again Figures 2 to 4 , and see Figure 6 In one embodiment, the switching assembly 2 further includes a rotating shaft 50 and a driving member 60. The driving member 60 is located on a side of the heat sink 30 away from the heat conductor 11. The extending direction of the rotating shaft 50 is parallel to the direction of the first axis Z. The rotating shaft 50 penetrates the heat sink 30 and the heat conductor 11, and the rotating shaft 50 can rotate relative to the heat sink 30 and the heat conductor 11. One end of the rotating shaft 50 is transmission-connected to the driving member 60, and the other end of the rotating shaft 50 is connected to the rotating member 20. The driving member 60 is transmission-connected to the rotating shaft 50 to drive the rotating shaft 50 to rotate, and the rotating shaft 50 further drives the rotating member 20 connected thereto to rotate, so that the discharge port 21 is switched to dock with a different first material channel 110.

[0111] A first through hole 113 is opened at the center of the heat conducting member 11, and a second through hole 311 is opened at the center of the main body 31. The axial directions of the first through hole 113 and the second through hole 311 are parallel to the direction of the first axis Z. One end of the rotating shaft 50 is located on the side of the heat dissipating member 30 away from the heat conducting member 11, and the other end of the rotating shaft 50 passes through the second through hole 311 and the first through hole 113 in sequence and then is connected to the rotating member 20.

[0112] Furthermore, the driving member 60 includes but is not limited to an electric motor, a motor, or a lever 61 .

[0113] In some implementations, the driving member 60 is an electric motor, and the driving member 60 directly drives the rotating shaft 50 to rotate after being energized.

[0114] In some other embodiments, the driving member 60 is a lever 61, which can be rotated by colliding with the lever 61. Specifically, the lever 61 is used to collide with a support frame 80 to rotate. The support frame 80 is the main frame of the 3D printing device 300, and is used to install other components of the 3D printing device 300. The nozzle device 100 can move relative to the support frame 80, and when the nozzle device 100 moves close to the support frame 80, the nozzle device 100 carries the lever 61 close to the support frame 80 until the lever 61 collides with the support frame 80, and the support frame 80 provides a certain driving force to the lever 61, and the driving force can drive the lever 61 to rotate a certain angle, and then the lever 61 drives the rotating member 20 to rotate a certain angle.

[0115] It is worth noting that, in order to ensure that the lever 61 can collide with the support frame 80 smoothly every time it approaches the support frame 80, the rotating shaft 50 may be provided with a torsion spring (not shown in the figure), so that the lever 61 can be driven by the torsion spring to reset after the lever 61 collides. In addition, a ratchet anti-return mechanism (not shown in the figure) may be provided between the rotating shaft 50 and the rotating member 20 to prevent the lever 61 from driving the rotating member 20 to reverse during the resetting process.

[0116] Please combine again Figure 5 and Figure 6 , and see Figure 2 The nozzle device 100 further includes a detection member 90 , which is configured to detect status information of the rotating member 20 and / or the rotating protrusion 22 to determine the position of the discharge port 21 .

[0117] Specifically, an extension portion 51 is convexly provided on the outer circumference of the rotating shaft 50, and the extension portion 51 protrudes from the outer circumference of the rotating shaft 50 in a direction away from the axis of the rotating shaft 50. The number of the extension portions 51 corresponds to the number of the first material channels 110, and is set to four. The four extension portions 51 are arranged at equal intervals around the first axis Z, and the angle between any two adjacent extension portions 51 corresponding to the first axis Z is 90°. The four extension portions 51 are arranged in a one-to-one correspondence with the four first material channels 110.

[0118] The detection member 90 includes a signal transmitter 91 and a signal receiver 92. The signal transmitter 91 transmits a detection laser toward the signal receiver 92. The signal transmitter 91 and the signal receiver 92 are both located on at least part of the rotation path of the extension 51. The signal transmitter 91 and the signal receiver 92 are spaced apart along the direction of the first axis Z so that a space is formed between the two for the extension 51 to rotate. When any one of the extensions 51 rotates to pass through the space formed between the signal transmitter 91 and the signal receiver 92, the extension 51 blocks the detection laser emitted by the signal transmitter 91, so that the signal receiver 92 cannot receive the detection laser and feeds back a detection signal to the control element (not shown), and the control element then analyzes the current rotation angle of the rotating shaft 50.

[0119] It should be noted that the detection member 90 can be fixed on the mounting base of the driving member 60 to fix the detection member 90. Those skilled in the art can select the structure to which the detection member 90 is fixed according to actual design requirements.

[0120] In this way, the detection member 90 detects the rotation angle of the rotating shaft 50 to obtain the rotation angle of the rotating member 20 that rotates with the rotating shaft 50, and then obtains the current position of the nozzle part 23 on the rotating member 20, so as to determine the first material channel 110 to which the current nozzle part 23 is connected, so as to analyze the extension, type and other information of the consumables currently delivered from the nozzle part 23 according to different first material channels 110.

[0121] It is understandable that when other embodiments are adopted, the detection member 90 may also adopt other sensing elements such as Hall sensors that can detect the rotation angle.

[0122] like Figure 7 As shown, combined with Figure 2 The embodiment of the present application further provides a print head 200, comprising an extrusion device 70 and the nozzle device 100. The nozzle device 100 is connected to the extrusion device 70, and the nozzle device 100 is located below the extrusion device 70, and is used to receive the consumables extruded by the extrusion device 70.

[0123] The extrusion device 70 is provided with a plurality of channels and is used for extruding consumables of different colors or materials. The number of channels provided in the extrusion device 70 is the same as the number of the second material channels 310 , so that each channel provided in the extrusion device 70 can be connected to a second material channel 310 .

[0124] like Figure 8 As shown, combined with Figure 7 The embodiment of the present application further provides a 3D printing device 300, including a support frame 80 and the above-mentioned print head 200. The print head 200 is movably connected to the support frame 80, so that the print head 200 can move in space to adjust the position of the consumables ejected from the print head 200.

[0125] Furthermore, the 3D printing device 300 further includes a feeding assembly (not shown in the figure), which is used to deliver consumables to the channel opened by the extrusion device 70. The feeding assembly can be arranged at the proximal end or the distal end of the extrusion device 70 to achieve proximal or distal delivery of the consumables.

[0126] It is understandable that the 3D printing device 300 in the present application can be any one of a gantry 3D printer, a single cantilever 3D printer, a whole-frame 3D printer, a whole-enclosed 3D printer, an infinite Z-axis 3D printer or a delta 3D printer.

[0127] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A nozzle device having a feed end and a discharge end, characterized in that: include: A heating assembly having a defined first axis, wherein a plurality of first channels are provided on the heating assembly; A switching assembly, comprising a rotating member, wherein the rotating member is rotatably connected to an end of the heating assembly close to the discharge end around the first axis; Wherein, a discharge port is provided on the rotating member, and the rotating member is configured to rotate relative to the heating component so that the discharge port is selectively connected to one of the first material channels.

2. The nozzle device according to claim 1, characterized in that: The heating assembly comprises: A heat conducting member, provided with a plurality of said first material channels; The heating element is arranged on the outer side of the heat conducting element, and the heating element is thermally coupled with the heat conducting element to transfer heat to the heat conducting element.

3. The nozzle device according to claim 2, characterized in that: The heat conducting member is provided with a mounting groove at one end close to the rotating member, and the first material channel is connected to the mounting groove; A rotating protrusion is provided at one end of the rotating member close to the heat conducting member, the discharge port passes through the rotating protrusion, the rotating protrusion is rotatably arranged in the mounting groove, and the rotating protrusion abuts against the bottom wall of the mounting groove to enable the discharge port to dock with the first material channel.

4. The nozzle device according to claim 3, characterized in that: The nozzle device further comprises a detection member, and the detection member is configured to detect status information of the rotating member and / or the rotating protrusion to determine the position of the discharge port.

5. The nozzle device according to claim 2, characterized in that: The nozzle device further comprises a heat sink, which is thermally coupled to the heat conducting member so that the heat conducting member transfers heat to the heat sink; The heat dissipation element is provided with a plurality of second material channels, and each of the second material channels is connected to a corresponding first material channel.

6. The nozzle device according to claim 5, characterized in that: The switching assembly also includes a rotating shaft and a driving member. The rotating shaft passes through the heat sink and the heat conductor. Two ends of the rotating shaft are respectively connected to the driving member and the rotating member. The driving member drives the rotating shaft to drive the rotating member to rotate.

7. The nozzle device according to claim 5, characterized in that: The nozzle device further comprises a connecting member, wherein the connecting member is located between the heat sink and the heat conductor, and the connecting member connects the heat sink and the heat conductor.

8. The nozzle device according to claim 7, characterized in that: The connecting piece is provided with a connecting channel, and the connecting channel is connected with the first channel and the second channel respectively.

9. The nozzle device according to claim 7, characterized in that: The heat sink and the heat conductor are spaced apart, and the connecting member includes a first section, a second section, and a third section which are connected in sequence, the first section is connected to the first material channel, the second section is located between the heat sink and the heat conductor, and the third section is connected to the second material channel.

10. The nozzle device according to claim 9, characterized in that: An outer diameter of the second section is smaller than outer diameters of the first section and the third section.

11. A print head, characterized in that: It comprises an extrusion device and a nozzle device as described in any one of claims 1 to 10, wherein the nozzle device is connected to the extrusion device and is used to receive the consumables extruded by the extrusion device.

12. A 3D printing device, characterized in that: It comprises a support frame, and a nozzle device as described in any one of claims 1 to 10 or a print head as described in claim 11, wherein the print head is movably connected to the support frame.

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