3D printing mechanism

Abstract

The utility model relates to a 3D printing mechanism. The 3D printing mechanism comprises a printing assembly, a heat dissipation piece, a heating piece and at least two throat pipes. Wherein the printing assembly comprises a nozzle and a printing head, and the heat dissipation piece is provided with a plurality of first through holes used for guiding consumables in. The heating piece is connected with the heat dissipation piece, the heating piece is provided with a plurality of second through holes, the second through holes and the first through holes are arranged in a one-to-one correspondence mode, the heating piece is rotatably arranged on the printing head, the printing head is provided with a discharging port corresponding to the nozzle, and the nozzle is fixed to the printing head and communicated with the discharging port. And the plurality of throat pipes are used for communicating the first through hole with the second through hole. Wherein the plurality of second through holes are arranged in a circumferential array, and the heat dissipation piece and the heating piece rotate relative to the printing head so as to communicate one of the plurality of second through holes with the nozzle. At the moment, the 3D printing mechanism can achieve printing of various consumables, so that the flexibility of the 3D printing mechanism can be improved, and then the application field of the 3D printing mechanism is widened.

Description

Technical Field

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

[0002] In traditional 3D printing technology, each different consumable requires a separate print head or nozzle. Therefore, when printing multiple materials, it is necessary to replace different print heads to achieve printing. At this time, it is often necessary to stop the machine for maintenance, which increases the downtime of the production line and affects the printing efficiency. Therefore, how to achieve multi-material printing without replacing the print head to improve printing efficiency is a technical problem that needs to be solved urgently. Utility Model Content

[0003] The present application provides a 3D printing mechanism to solve the technical problem of how to achieve multi-material printing to improve printing efficiency without replacing the print head.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: a 3D printing mechanism, the 3D printing mechanism comprising: a printing component, including a nozzle and a print head; a heat sink, provided with a plurality of first through holes for introducing consumables; a heating element, connected to the heat sink, the heating element provided with a plurality of second through holes, the second through holes being arranged one-to-one with the first through holes, the heating element being rotatably arranged on the print head, the print head being provided with a discharge port corresponding to the nozzle, the nozzle being fixed to the print head and connected with the discharge port; a plurality of throats, used to connect the first through hole with the second through hole; wherein the plurality of second through holes are arranged in a circular array, the heat sink and the heating element are rotated relative to the print head to connect one of the plurality of second through holes with the nozzle.

[0005] According to one embodiment of the present application, the 3D printing mechanism further includes: a rotating component connected to the heat sink and the heating element, and used to drive the heat sink and the heating element to rotate relative to the print head.

[0006] According to one embodiment of the present application, the rotating component includes: a rotating shaft, which passes through the heating element and the heat sink, and the rotating shaft is connected to the print head and drives the heating element and the heat sink to rotate relative to the print head; wherein the rotating shaft is located at the center of the circular array.

[0007] According to one embodiment of the present application, the rotating assembly further includes: a first bearing, which is sleeved outside one end of the rotating shaft and located inside the heat sink; and a second bearing, which is sleeved outside the other end of the rotating shaft and located inside the heating element.

[0008] According to an embodiment of the present application, a diameter of a middle portion of the rotating shaft between the first bearing and the second bearing is smaller than a diameter of a side away from the first bearing and a diameter of a side away from the second bearing.

[0009] According to one embodiment of the present application, the axial direction of the first through hole and the axial direction of the second through hole are arranged parallel to the axial direction of the throat pipe and the axial direction of the discharge port.

[0010] According to one embodiment of the present application, the heating element includes: a heat-conducting block provided with the first through hole; and a heating ring sleeved outside the heat-conducting block and used to heat the heat-conducting block.

[0011] According to one embodiment of the present application, the heat conductive block includes an extension portion and a bending portion, the bending portion is connected to one end of the extension portion close to the heat sink, and the bending portion extends toward an end away from the rotating shaft, and the 3D printing mechanism also includes a locking member, which passes through the bending portion and is connected to the heat sink.

[0012] According to one embodiment of the present application, the heating element further includes: a first heat-conductive sleeve, disposed in the first through hole and sleeved outside the throat; a second heat-conductive sleeve, disposed in the second through hole and sleeved outside the throat.

[0013] According to one embodiment of the present application, the 3D printing mechanism also includes: a plurality of connecting tubes connected to the periphery of the second through hole for introducing the consumables; a plurality of pipe joints, some of which are inserted into the second through hole and the other part is fitted with the connecting tubes.

[0014] The beneficial effects of the present application are as follows: the 3D printing mechanism of the present application includes a heat sink, a heating element, at least two throats and a printing assembly. Among them, the heat sink is provided with a plurality of first through holes for introducing consumables. The heating element is connected to the heat sink, and the heating element is provided with a plurality of second through holes, and the second through holes are arranged one by one with the first through holes. At least two throats are used to connect the first through hole and the second through hole. The printing assembly includes a nozzle and a print head, and the heating element can be rotatably arranged on the print head, and the print head is provided with a discharge port corresponding to the nozzle, and the nozzle is fixed to the print head and communicated with the discharge port. Among them, the plurality of second through holes are arranged in a circular array, and the heat sink and the heating element rotate relative to the print head to connect the plurality of second through holes with the nozzle in sequence. In the 3D printing process, the heat sink and the heating element can be controlled to rotate relative to the print head to switch different throats to communicate with the nozzle on the print head. If the consumables need to be switched, the heat sink and the heating element can be rotated relative to the print head to connect a certain consumable required by the user with the nozzle to realize the printing of the consumable. Therefore, the present application can use different types of consumables without stopping to replace the print head, realize multi-material printing, and better improve the flexibility of the 3D printing mechanism. At the same time, since there is no need to stop to replace the print head during use, the entire printing process can save time and human resources, so as to better improve printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a front structural schematic diagram of an embodiment of a 3D printing mechanism of the present application;

[0017] Figure 2 It is a schematic diagram of a top view of a 3D printing mechanism according to an embodiment of the present application;

[0018] Figure 3 It is a cross-sectional structural diagram of an embodiment of a 3D printing mechanism of the present application. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In traditional 3D printing technology, each different consumable requires a separate print head or nozzle, which limits the efficiency and flexibility of multi-material printing. At the same time, replacing different print heads usually requires downtime maintenance, which often increases the downtime of the production line.

[0024] In view of this, an embodiment of the present application provides a 3D printing mechanism 10. Figures 1 to 3 , Figure 1 It is a front structural schematic diagram of the 3D printing mechanism of the present application; Figure 2 It is a top view structural schematic diagram of the 3D printing mechanism of the present application; Figure 3It is a cross-sectional structural diagram of an embodiment of a 3D printing mechanism of the present application.

[0025] The 3D printing mechanism 10 includes a printing assembly 13, a heat sink 122, a heating element 123, and a plurality of throats 11. The printing assembly 13 includes a nozzle 131 and a print head 132. The heat sink 122 is provided with a plurality of first through holes 1211 for introducing consumables 20. The heating element 123 is connected to the heat sink 122. The heating element 123 is provided with a plurality of second through holes 1212. The second through holes 1212 are arranged one-to-one with the first through holes 1211. The heating element 123 can be rotatably arranged on the print head 132, and the print head 132 is provided with a discharge port (not shown in the figure) corresponding to the nozzle 131. The nozzle 131 is fixed to the print head 132 and communicated with the discharge port. The plurality of throats 11 are used to connect the first through hole 1211 and the second through hole 1212. At least two throats 11 are used to connect the first through hole 1211 and the second through hole 1212. The temperature control assembly 12 can be rotatably disposed on the print head 132. The print head 132 is provided with a discharge port (not shown in the figure) corresponding to the nozzle 131. The nozzle 131 is fixed to the print head 132 and communicated with the discharge port. Among them, the plurality of second through holes 1212 are arranged in a circular array. The heat sink 122 and the heating element 123 rotate relative to the print head 132 to connect one of the plurality of second through holes 1212 with the nozzle 131.

[0026] As can be seen from the above structure, the 3D printing mechanism 10 in the present application can realize the printing of multiple consumables 20, thereby improving the flexibility of the 3D printing mechanism 10 and then broadening the application field of the 3D printing mechanism 10. Specifically, a plurality of first through holes 1211 are provided on the heat sink 122, and a plurality of second through holes 1212 are provided on the heating element 123. The first through holes 1211 correspond to the second through holes 1212, and the throat 11 communicates with the first through holes 1211 and the second through holes 1212. At this time, when the consumable 20 is printed, the heating element 123 can heat the consumable 20 to melt the consumable 20, thereby facilitating the extrusion of the consumable 20. The setting of the heat sink 122 can prevent the consumables 20 around the heating element 123 from being affected by heat transfer. Therefore, the setting of the heating element 123 and the heat sink 122 can well control the temperature of the consumables 20 in the throat 11. It can not only heat and melt the consumables 20 in the throat 11 through the heating element 123 to facilitate the extrusion of the consumables 20, but also dissipate the heat of the consumables 20 through the heat sink 122 to reduce the influence of heat transfer on the consumables. At this time, the 3D printing mechanism 10 can be smoother when performing printing operations.

[0027] Optionally, in some other embodiments, the throat 11 can be arranged in a one-to-one correspondence with the first through hole 1211 and the second through hole 1212, or the throat 11 and the first through hole 1211 and the second through hole 1212 can also be in other corresponding ways, such as sharing, etc., which is not limited here.

[0028] Furthermore, the heat sink 122 and the heater 123 can be rotatably disposed on the print head 132. During the 3D printing process, the heat sink 122 and the heater 123 can be controlled to rotate relative to the print head to switch different throats 11 to communicate with the nozzle 131 on the print head 132. If it is necessary to switch the consumable 20, the heat sink 122 and the heater 123 can be rotated relative to the print head 132 to make a certain consumable 20 required by the user communicate with the nozzle 131 to achieve printing of the consumable. Therefore, the present application can use different types of consumables 20 without stopping to replace the print head 132, realize multi-material printing, and better improve the flexibility of the 3D printing mechanism 10. At the same time, since there is no need to stop to replace the print head 132 during use, the entire printing process can save time and human resources to better improve printing efficiency.

[0029] In addition, since the 3D printing mechanism 10 shares a heat sink 122 and a heating element 123 in the process of printing multiple consumables 20, the equipment cost of the 3D printing mechanism 10 can be effectively reduced, and the maintenance cost of the 3D printing mechanism 10 can also be reduced. The nozzle 131 is fixed on the print head 132, and the stability of the nozzle 131 during the printing process can be well guaranteed, thereby ensuring the printing accuracy.

[0030] It should be noted that the number of the first through holes 1211 may be 2, or the number of the first through holes 1211 may be 5, or the number of the first through holes 1211 may be 9, which is not limited here. The number of the second through holes 1212 and the number of the first through holes 1211 are set in a one-to-one correspondence. The number of consumables 20 may be less than or equal to the number of the first through holes 1211, and the number of throats 11 and the number of consumables 20 are set in a one-to-one correspondence. In addition, the diameter of the throat 11 is larger than the diameter of the consumable 20, and the diameter of the throat 11 is 0.1mm-0.3mm larger than the diameter of the consumable 20. At this time, it is not only convenient to introduce the consumable 20, but also the amount of the consumable 20 introduced can be well controlled to avoid excessive introduction of the consumable 20, which can not be completely used up later and cause waste of the consumable 20. At the same time, when the diameter of the throat 11 is too large, the diameters of the first through hole 1211 and the second through hole 1212 will also increase accordingly, and the number of the first through hole 1211 and the second through hole 1212 that can be opened on the heat sink 122 and the heating element 123 will be reduced, thereby reducing the types of consumables 20. Therefore, when the diameter of the throat 11 is 0.1mm-0.3mm larger than the diameter of the consumable 20, it is not only convenient to introduce the consumable 20, but also the 3D printing mechanism 10 can adapt to more consumables 20 of different sizes, thereby ensuring the flexibility of the 3D printing mechanism 10.

[0031] Specifically, during the printing process using the 3D printing mechanism 10, since the throat 11 is at least partially located in the corresponding first through hole 1211, the heating element 123 can heat the throat 11, and then according to the heat transfer, can heat the consumable 20, so that the consumable 20 softens and flows in the throat 11, so that the consumable 20 can be easily extruded from the nozzle 131. In addition, the heating element 123 can also make each throat 11 evenly heated to ensure the smooth flow of the consumable 20 in each throat 11, so that when the user needs to perform multi-material printing, each consumable 20 can be smoothly extruded to achieve printing. And the heating element 123 embeds the throat 11 through the first through hole 1211 thereon, which can facilitate the improvement of the stability of the throat 11 and the loading and unloading of the throat 11.

[0032] The heat sink 122 includes a main body 1221 having a second through hole 1212 and a plurality of fins 1222 disposed on the periphery of the main body 1221 and spaced apart along the axis of the second through hole 1212. The heating element 123 is disposed between the printing assembly 13 and the heat sink 122. The heat sink 122 can dissipate heat from the throat 11 and the consumables 20 in the throat 11.

[0033] Furthermore, during the printing process of the 3D printing mechanism 10, the end of the throat 11 away from the print head 132 is the upper side of the throat 11, and the end of the throat 11 close to the print head 132 is the lower side of the throat 11. When the temperature of the consumable 20 above the throat 11 is too high, the consumable 20 is likely to melt, thereby causing blockage of the consumable 20 above the throat 11. This will affect the circulation of the consumable 20 in the throat 11, thereby reducing the efficiency of extruding the consumable 20 from the nozzle 131, or the consumable 20 cannot be extruded from the nozzle 131, affecting the printing efficiency. Therefore, the heat sink 122 can well reduce the temperature of the consumable 20 above the throat 11 to avoid excessively high temperature in the consumable 20 above the throat 11, thereby ensuring that the consumable 20 can be smoothly extruded from the nozzle 131. Furthermore, the heating element 123 is arranged between the printing assembly 13 and the heat sink 122. The temperature of the consumable 20 near the printing assembly 13 is relatively high, that is, the temperature of the consumable 20 below the throat 11 is relatively high, which can facilitate the consumable 20 to be extruded from the nozzle 131. The temperature of the consumable 20 located far from the printing assembly 13 is relatively low, that is, the temperature of the consumable 20 located above the throat 11 is relatively low, thereby avoiding the phenomenon that the consumable 20 blocks the throat 11 due to the high temperature of the consumable 20 in the throat 11 located far from the printing assembly 13 due to the heat transfer at the heating element 123. Therefore, the heat sink 122 and the heating element 123 can balance the temperature of the consumable 20 in the throat 11 to ensure the efficiency of the consumable 20 extrusion, thereby ensuring the efficiency of 3D printing. In addition, the heat sink 122 and the heating element 123 can provide heat dissipation and heating functions for multiple throats 11, and can also well reduce costs and space occupation.

[0034] Optionally, the heat sink 122 includes a main body 1221 having a second through hole 1212 and a plurality of fins 1222 disposed on the periphery of the main body 1221 and spaced apart along the axis of the second through hole 1212. The heating element 123 is disposed between the printing assembly 13 and the heat sink 122.

[0035] The arrangement of multiple fins 1222 can improve the heat dissipation efficiency. At this time, heat can be transferred to the air through the multiple fins 1222, thereby effectively reducing the temperature of the consumables 20 in the throat 11. Therefore, the overall structure of the heat sink 122 has the advantages of high heat dissipation efficiency and stable structure.

[0036] It should be noted that the axial direction of the first through hole 1211 and the axial direction of the second through hole 1212 are arranged parallel to the axial direction of the throat 11. At this time, when the throat 11 is inserted into the first through hole 1211 and the second through hole 1212 in sequence, it can be smoother and smoother, so that the user can save more effort during the operation. In addition, the first through hole 1211 and the second through hole 1212 can also play a certain limiting role on the throat 11, so as to avoid that in the later use process, as the heat sink 122 and the heating element 123 rotate, the position of the throat 11 is offset, causing the throat 11 to be unable to communicate with the nozzle 131, affecting the printing efficiency. Therefore, the axial direction of the first through hole 1211 and the second through hole 1212 is arranged parallel to the axial direction of the throat 11, which can not only make the insertion process of the throat 11 smoother, but also can use the self structure of the first through hole 1211 and the second through hole 1212 to play a good limiting role on the throat 11, while not affecting the printing efficiency, reducing the number of structural parts and reducing costs.

[0037] Optionally, the axial direction of the discharge port is arranged parallel to the axial direction of the first through hole 1211 , the axial direction of the second through hole 1212 and the axial direction of the throat pipe 11 , so that the consumables in the throat pipe 11 can flow out of the discharge port more smoothly.

[0038] In one embodiment of the present application, the 3D printing mechanism 10 further includes a rotating assembly 140. The rotating assembly 140 is connected to the heat sink 122 and the heater 123, and is used to drive the heat sink 122 and the heater 123 to rotate relative to the print head 132. By setting the rotating assembly 140, the process of rotating the heat sink 122 and the heater 123 relative to the print head 132 can be made more labor-saving.

[0039] Specifically, the rotating assembly 140 includes a rotating shaft 124. The rotating shaft 124 is provided through the heating element 123 and the heat sink 122. The rotating shaft 124 is connected to the print head 132 and drives the heating element 123 to rotate relative to the print head 132. Specifically, when the user needs to replace the consumables 20 to realize multi-material printing during the 3D printing process, the rotation of the rotating shaft 124 can drive the heat sink 122 and the heating element 123 to rotate. At this time, under the rotation of the heat sink 122 and the heating element 123, the multiple throats 11 and the consumables 20 in the throats 11 will also rotate accordingly, and then the user can stop the rotation when the consumables 20 required by the user are connected to the nozzle 131 according to their own needs, and then printing can be carried out. The setting of this structure enables the user to use different types of consumables 20 without stopping to replace the print head 132 during the use of the 3D printing mechanism 10, and realize multi-material printing, thereby better improving the flexibility of 3D printing.

[0040] Furthermore, the rotating assembly 140 also includes a first bearing 125 and a second bearing 126. The first bearing 125 is sleeved outside one end of the rotating shaft 124 and is located in the heat sink 122. The second bearing 126 is sleeved outside the other end of the rotating shaft 124 and is located in the heating element 123. The provision of the first bearing 125 can reduce the friction between the heat sink 122 and the rotating shaft 124. The provision of the second bearing 126 can reduce the friction between the heating element 123 and the rotating shaft 124, thereby making the rotation of the entire rotating shaft 124 more labor-saving. At the same time, since the rotating shaft 124 is sequentially arranged in the main body 1221 of the heat conductive block 1231 and the heat sink 122, the position where the rotating shaft 124 contacts the heat sink 122 and the heat conductive block 1231 will bear a large supporting force, and the first bearing 125 and the second bearing 126 can prevent the position where the rotating shaft 124 contacts the heat sink 122 and the heat conductive block 1231 from being damaged due to the supporting force, thereby well extending the service life of the structure. In addition, the first bearing 125 can play a certain supporting role for the heat sink 122, and the second bearing 126 can play a certain supporting role for the heat conductive block 1231, thereby well ensuring the stability of the heat sink 122 and the heat conductive block 1231 structure during the rotation of the rotating shaft 124.

[0041] Optionally, the diameter of the middle portion between the first bearing 125 and the second bearing 126 is smaller than the diameter of the side away from the first bearing 125 and the side away from the second bearing 126. In this case, the heat dissipation efficiency of the heat sink 122 can be increased, thereby effectively reducing heat transfer, so as to ensure the smoothness of the extrusion of the consumable 20 during the printing operation to a greater extent, thereby improving the overall printing efficiency.

[0042] Optionally, the heating element 123 includes a heat-conducting block 1231 and a heating ring 1232. The heat-conducting block 1231 is provided with a first through hole 1211. The heating ring 1232 is sleeved outside the heat-conducting block 1231 and is used to heat the heat-conducting block 1231. Specifically, during the 3D printing process, the heating ring 1232 is heated. At this time, the temperature of the heat-conducting block 1231 will increase when the heating ring 1232 is heated, and then the heat-conducting block 1231 can transfer the temperature to the throat 11, and then transfer it from the throat 11 to the consumable 20, so that the consumable 20 can soften. In the embodiment of the present application, the heat conducting block 1231 only has the function of heat transfer, and it cannot directly heat. At this time, it can avoid that the temperature of the consumable 20 in the throat 11 rises quickly due to direct heating by the heat conducting block 1231, causing the consumable 20 to melt in a short time, thereby causing the consumable 20 to be blocked at the connection between the throat 11 and the nozzle 131, affecting the printing process. Therefore, by indirectly heating through the heating ring 1232 and cooperating with the heat conducting block 1231 to conduct heat, it can not only heat the consumable 20, but also avoid the consumable 20 melting due to the high temperature of the consumable 20, causing the consumable 20 to be blocked in the throat 11, thereby better ensuring the efficiency of 3D printing.

[0043] It should be noted that the heating ring 1232 is usually fixed to the outer wall of the heat conductive block 1231 by a heat conductive tape. In this case, the heat conductive tape can also well improve the heat conductive effect of the entire heat conductive block 1231. The heat conductive block 1231 is usually made of aluminum, copper, graphite, silicon carbide and other materials, which are not limited here. The heating ring 1232 can be a ceramic heating ring 1232, or a heating ring 1232 made of other materials, which are not limited here.

[0044] Further, in order to realize the connection between the heat sink 122 and the heater 123, in one embodiment of the present application, the heat conducting block 1231 includes an extension portion 1233 and a bending portion 1234. The bending portion 1234 is connected to one end of the extension portion 1233 close to the heat sink 122, and the bending portion 1234 extends toward one end away from the rotating shaft 124. The 3D printing mechanism 10 also includes a locking member 16. The locking member 16 passes through the bending portion 1234 and is connected to the heat sink 122. Through the setting of the locking member 16, the connection between the heat sink 122 and the heater 123 can be made more secure, and when the user needs to replace the consumables 20 to realize multi-material printing, the heat sink 122 and the heater 123 can rotate synchronously during the process of the rotating shaft 124 driving the heat sink 122 and the heater 123 to rotate, thereby avoiding the situation where the throat 11 is damaged due to the asynchronous rotation of the two, causing the consumables 20 to overflow and the consumables 20 to be wasted. Therefore, the setting of the locking member 16 can not only fasten the heat sink 122 and the heating member 123 , but also enable the heat sink 122 and the heating member 123 to rotate synchronously.

[0045] In one embodiment of the present application, the heating element 123 further includes a first heat-conducting sleeve 1235 and a second heat-conducting sleeve 1236. The first heat-conducting sleeve 1235 is disposed in the first through hole 1211 and is sleeved outside the throat 11. The second heat-conducting sleeve 1236 is disposed in the second through hole 1212 and is sleeved outside the throat 11. Specifically, since the thermal conductivity of the throat 11 is generally low, the first heat-conducting sleeve 1235 is provided to promote the heat conduction efficiency of the heat-conducting block 1231 to the throat 11, so that the consumables 20 located in the throat 11 can be quickly heated to improve the heating efficiency of the heating element 123. In order to accelerate the heat dissipation efficiency of the heat dissipating element 122, the second heat-conducting sleeve 1236 is provided to quickly conduct away the heat at the throat 11 to avoid the consumables 20 in the throat 11 from being too high in temperature and causing the consumables 20 to melt, thereby causing the consumables 20 to be blocked in the throat 11. Therefore, the arrangement of the first heat-conducting sleeve 1235 and the second heat-conducting sleeve 1236 can not only improve the heating efficiency of the heating element 123 , but also improve the heat dissipation efficiency of the heat dissipation element 122 , thereby better ensuring the uniformity of the temperature of the consumables 20 in the throat 11 .

[0046] Furthermore, in order to allow the consumables 20 to be smoothly introduced into the throat 11, in one embodiment of the present application, the 3D printing mechanism 10 further includes a plurality of Teflon tubes 14 and a plurality of pipe joints 15. The plurality of Teflon tubes 14 are connected to the periphery of the second through hole 1212 for introducing the consumables 20. Parts of the plurality of pipe joints 15 are inserted into the second through hole 1212, and the other parts are arranged in close contact with the Teflon tubes 14. Specifically, when the consumable 20 is introduced, it is usually introduced from the second through hole 1212 on the end of the heat sink 122 away from the heating element 123. However, due to the limited inner diameter of the second through hole 1212, the second through hole 1212 is set on the main body of the heat sink 122. When the consumable 20 is directly introduced through the through hole 121, it does not conform to the ergonomic design and easily causes waste of the consumable 20. Therefore, the Teflon tube 14 is connected to the periphery of the second through hole 1212. At this time, the consumable 20 is introduced from the entrance of the Teflon tube 14. At this time, the user has a certain operating space in the process of introducing the consumable 20, which makes the entire introduction process more labor-saving, and at the same time, it can also well avoid waste in the process of introducing the consumable 20. The setting of the pipe joint 15 can make the Teflon tube 14 more stable when the consumable 20 is introduced from the entrance of the Teflon tube 14.

[0047] It should be noted that the number of Teflon tubes 14 is set corresponding to the number of through holes 121, and the number of pipe joints 15 is also set corresponding to the number of through holes 121. At this time, multiple consumables 20 can be introduced at the same time to improve the introduction efficiency.

[0048] In one embodiment of the present application, the 3D printing mechanism 10 also includes a power source (not shown in the figure). The power source is used to drive the heater 123 and the heat sink 122 to rotate. Specifically, when the user needs to replace the consumables 20 to achieve multi-material printing, the power source is started, and then the heater 123 and the heat sink 122 can be driven to rotate until a certain consumable 20 required by the user is connected to the nozzle 131, and printing can be performed at this time. Through the setting of the power source, the user can save more effort during the operation. Furthermore, in the process of using the 3D printing mechanism 10, the user can also use different types of consumables 20 without stopping to replace the print head 132, so as to achieve multi-material printing, so as to better improve the flexibility of 3D printing. At the same time, since there is no need to stop to replace the print head 132 during use, the entire printing process can save time and human resources well, so as to better improve printing efficiency.

[0049] It should be noted that, in the embodiments of the present application, the power source may be an engine, or the power source may also be an external power source, or may be some other structure, which is not limited here.

[0050] Of course, in some other embodiments, when the user needs to replace the consumable 20 to achieve multi-material printing, the user can also manually apply a certain external force to the heat sink 122 and the heating element 123 to rotate the heat sink 122 and the heating element 123 to a certain consumable 20 required by the user to communicate with the nozzle 131. In this case, no additional power source is required, and the cost is lower.

[0051] It should be noted that the terms "horizontal", "vertical" and the like do not mean that the components are absolutely horizontal or vertical, but can be slightly tilted; the terms "parallel", "vertical" and the like do not mean that the components are absolutely parallel or vertical, but can form a certain angle deviation. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In addition, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed when used, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0052] It is to be understood that the meaning of "plurality" herein is at least two, such as two, three, etc., unless there is a special limitation. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. The term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0053] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A 3D printing mechanism, characterized in that: The 3D printing mechanism comprises: Printing components, including nozzles and print heads; The heat sink is provided with a plurality of first through holes for introducing consumables; A heating element connected to the heat sink, the heating element being provided with a plurality of second through holes, the second through holes being provided in one-to-one correspondence with the first through holes, the heating element being rotatably provided on the print head, the print head being provided with a discharge port corresponding to the nozzle, the nozzle being fixed to the print head and being communicated with the discharge port; A plurality of throats, used for connecting the first through hole with the second through hole; The plurality of second through holes are arranged in a circular array, and the heat sink and the heating element rotate relative to the print head to connect one of the plurality of second through holes with the nozzle.

2. The 3D printing mechanism according to claim 1, characterized in that: The 3D printing mechanism also includes: The rotating assembly is connected to the heat sink and the heating element, and is used to drive the heat sink and the heating element to rotate relative to the print head.

3. The 3D printing mechanism according to claim 2, characterized in that: The rotating assembly comprises: A rotating shaft, passing through the heating element and the heat sink, the rotating shaft is connected to the print head and drives the heating element and the heat sink to rotate relative to the print head; Wherein, the rotation axis is located at the center of the circular array.

4. The 3D printing mechanism according to claim 3, characterized in that: The rotating assembly further comprises: A first bearing is sleeved outside one end of the rotating shaft and is located inside the heat sink; The second bearing is sleeved outside the other end of the rotating shaft and is located inside the heating element.

5. The 3D printing mechanism according to claim 4, characterized in that: The diameter of the middle portion of the rotating shaft between the first bearing and the second bearing is smaller than the diameter of the side away from the first bearing and the side away from the second bearing.

6. The 3D printing mechanism according to any one of claims 1 to 5, characterized in that: The axial direction of the first through hole and the axial direction of the second through hole are arranged in parallel with the axial direction of the throat pipe and the axial direction of the discharge port.

7. The 3D printing mechanism according to claim 3, characterized in that: The heating element comprises: A heat conducting block, provided with the first through hole; The heating ring is sleeved outside the heat-conducting block and is used to heat the heat-conducting block.

8. The 3D printing mechanism according to claim 7, characterized in that: The heat conductive block includes an extension portion and a bending portion, the bending portion is connected to one end of the extension portion close to the heat sink, and the bending portion extends toward an end away from the rotating shaft, and the 3D printing mechanism also includes a locking member, which passes through the bending portion and is connected to the heat sink.

9. The 3D printing mechanism according to claim 1, characterized in that: The heating element further comprises: A first heat-conducting sleeve is disposed in the first through hole and sleeved outside the throat; The second heat-conducting sleeve is disposed in the second through hole and sleeved outside the throat.

10. The 3D printing mechanism according to claim 1, characterized in that: The 3D printing mechanism also includes: A plurality of connecting tubes connected to the periphery of the second through hole and used for introducing the consumables; A plurality of pipe joints, some of which are inserted into the second through hole, and the other parts are fitted with the connecting pipe.

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