Extrusion device

Abstract

The extrusion device comprises a nozzle, a heating assembly, a heat dissipation assembly and a throat pipe assembly, and the nozzle is fixedly arranged on the heating assembly; the heat dissipation assembly and the heating assembly are arranged at intervals and are relatively fixed; the throat pipe assembly comprises a throat pipe and an elastic piece, the elastic piece is connected with the throat pipe, and the throat pipe is provided with a first end and a second end opposite to each other in the extending direction of the throat pipe. The first end is inserted into the nozzle and communicated with the nozzle, at least part, close to the first end, of the throat pipe is located in the heating assembly, the second end is inserted into the heat dissipation assembly, and the throat pipe is elastically connected with the heat dissipation assembly in the extending direction through an elastic piece. By means of the mode, the throat pipe can be reliably and accurately positioned and installed.

Description

Technical Field

[0001] The present application relates to the field of 3D printing equipment, and in particular to an extrusion device. Background Art

[0002] 3D printing equipment, also known as three-dimensional printing equipment, can generally be based on digital model files, use plastic and other consumables, and print layer by layer to produce three-dimensional objects corresponding to the digital model.

[0003] 3D printing equipment generally has a pipe for conveying consumables. The installation and positioning of the pipe is crucial, but the pipe and other parts used to position the pipe often have manufacturing errors, so the pipe may be squeezed and damaged, wrinkled or have burrs during the assembly process; it may also cause a gap between the pipe and other parts during the assembly process, making it impossible to reliably position the pipe or even cause it to shake. Utility Model Content

[0004] The present application provides an extrusion device that can position and install the throat pipe reliably and accurately.

[0005] To this end, a technical solution adopted in the present application is: the extrusion device includes a nozzle, a heating component, a heat dissipation component and a throat component, the nozzle is fixedly arranged on the heating component, wherein the heating component is sleeved on the outer periphery of the nozzle; the heat dissipation component and the heating component are arranged at intervals and relatively fixed; the throat component includes a throat and an elastic member, the elastic member connects the throat, and the throat has a first end and a second end opposite to each other in its extension direction. The first end is inserted into the nozzle and communicated with the nozzle, and at least a part of the throat close to the first end is located inside the heating component, the second end is inserted into the heat dissipation component, and the throat is elastically connected to the heat dissipation component in the extension direction through the elastic member; and a material guide pipe component is provided with a material guide channel, and the heat dissipation component is arranged in the guide pipe component so that the material guide channel is connected to the throat.

[0006] The beneficial effects of the present application are as follows: different from the related art, in the extension direction of the throat, the throat is elastically abutted against the heat dissipation component through an elastic member, and the elastic member can be elastically deformed after abutting against the heat dissipation component, thereby generating an elastic effect to limit the heating component and the heat dissipation component from approaching each other, thereby achieving the effect of assembly positioning. During the assembly process, the first end of the throat needs to be assembled with the nozzle and the heating component, and the second end of the throat needs to be assembled with the heat dissipation component, and the second end is elastically fixed by the heat dissipation component through the elastic member. The elastic member can adaptively undergo elastic deformation during the assembly process to compensate for the manufacturing error of the throat or the heat dissipation component, thereby making the throat neither easily squeezed nor easily shaken. That is to say, during the assembly process, the elastic member can abut against the heat dissipation component and undergo elastic deformation, and the deformation amount of the elastic deformation of the elastic member can adaptively change, so that the relative position of the heating component and the heat dissipation component can be fine-tuned, which is beneficial for the throat to ignore the manufacturing error during the assembly process so as to reasonably assemble and connect with the heating component and the heat dissipation component respectively, thereby reducing the production difficulty and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of an exploded structure of an embodiment of an extrusion device of the present application;

[0008] Figure 2 is a front view of an embodiment of the extrusion device of the present application;

[0009] Figure 3 is a cross-sectional schematic diagram of an embodiment of an extrusion device of the present application;

[0010] Figure 4 It is a schematic diagram of the assembly structure of the nozzle and the heating component involved in the embodiment of the extrusion device of the present application;

[0011] Figure 5 It is a schematic diagram of the exploded structure after the nozzle and the heating assembly involved in the embodiment of the extrusion device of the present application are assembled;

[0012] Figure 6 It is a schematic diagram of the structure of the throat involved in the embodiment of the extrusion device of the present application;

[0013] Figure 7 yes Figure 6 A schematic cross-sectional view along the cutting plane A1-A2;

[0014] Figure 8 It is a schematic diagram of the assembly principle of the throat involved in the extrusion device embodiment of the present application.

[0015] Description of reference numerals:

[0016] 1. Extrusion device;

[0017] 110 nozzle; 111 nozzle channel; 120 insertion slot; 121 support table;

[0018] 150 heating assembly; 151 heating block; 152 heating sheet; 153 fixing block; 154 silicone sleeve;

[0019] 200 throat assembly; 210 throat; 211 consumables channel; 212 first pipe section; 213 second pipe section; 214 stepped surface; 220 elastic member;

[0020] 300 heat dissipation assembly; 301 annular support surface; 302 first accommodating channel; 303 second accommodating channel; 330 heat dissipation sleeve; 340 inclined surface positioning member; 350 connecting member;

[0021] 400 material guide tube assembly; 401 material guide channel. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0023] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0024] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0025] 3D printing equipment generally includes an extruder and a hot bed. Among them, the hot bed mainly plays a bearing role. The extruder can heat the solid consumables to a molten state, and further extrude and coat them on the hot bed for shaping to form a processing layer. After completing the shaping of at least one layer of the processing layer, the molten consumables can be coated on the shaped processing layer, and when the molten consumables are shaped, they can be firmly connected to the previous processing layer. Repeat the above steps, and the production of three-dimensional objects can be completed by printing layer by layer.

[0026] The extrusion device can be further described in the following embodiments. The following consumable material output device embodiment of the present application describes an exemplary structure of the extrusion device.

[0027] See also Figure 1 , Figure 2 and Figure 3 According to one or more embodiments of the present application, the extrusion device 1 includes a nozzle 110, a heating assembly 150 and a throat assembly 200. The nozzle 110 is fixedly arranged on the heating assembly 150. The throat assembly 200 may include a throat 210. A consumable channel 211 may be provided inside the throat 210. The nozzle 110 is provided with a nozzle channel 111. The consumable channel 211 may be connected to the nozzle channel 111. In this case, the consumable can enter the nozzle channel 111 through the consumable channel 211 of the throat 210, and be heated by the heating assembly 150 in the nozzle channel 111 to be converted from a solid state to a molten state. In some embodiments, the heating assembly 150 is sleeved on the periphery of the nozzle 110, and part of the throat 210 is located inside the heating assembly 150.

[0028] See also Figure 4 and Figure 5 According to one or more embodiments of the present application, the heating assembly 150 may include a heating block 151 and a heating plate 152. The heating plate 152 may be disposed on the side of the heating block 151 to generate heat. The heating plate 152 generates heat after being energized, and the heating block 151 may serve as a substrate and a heat transfer medium for the heating plate 152. The heating block 151 may be disposed on the nozzle 110 to transfer heat to the nozzle 110. Furthermore, the heating block 151 may be sleeved on the nozzle 110 to facilitate uniform transfer of heat to the nozzle 110. In addition, the heating block 151 may be provided with an internal thread, and the nozzle 110 may be provided with an external thread that matches the internal thread of the heating block 151, and the nozzle 110 and the heating block 151 may be fixed to each other by a threaded connection.

[0029] In addition, the heating assembly 150 may further include a fixing block 153 and a silicone sleeve 154. The fixing block 153 may be used to fix the heating sheet 152 on the heating block 151. The silicone sleeve 154 may be sleeved on the outside of the fixing block 153 to limit the heat loss to the environment, thereby reducing heat loss. At the same time, the silicone sleeve 154 may also serve as a decoration and provide protection for the user, reducing the risk of the user being burned by accidental touch.

[0030] See also Figure 1 , Figure 2 and Figure 3According to one or more embodiments of the present application, the extrusion device 1 may further include a heat dissipation component 300. The heat dissipation component 300 is spaced apart from and fixedly connected to the heating component 150. The heat dissipation component 300 is disposed on a side of the heating component 150 away from the outlet of the nozzle 110. The heat dissipation component 300 is fixedly connected to the heating component 150, for example, by bolts. The throat assembly 200 can dissipate heat through the heat dissipation component 300, so that most or all of the consumables inside the throat 210 are in a solid state, which is conducive to recycling the consumables or squeezing the consumables into the nozzle 110.

[0031] See also Figure 2 and Figure 3 According to one or more embodiments of the present application, the extrusion device 1 further includes a material guide tube assembly 400. The material guide tube assembly 400 may be provided with a material guide channel 401. The heat dissipation assembly 300 is disposed on the material guide tube assembly 400 and enables the material guide channel 401 to be connected to the throat 210, so that the consumables inside the material guide channel 401 can be transported to the nozzle 110 via the throat 210. For example, the material guide channel 401 may be connected to the consumable channel 211 of the throat 210, so that the consumables inside the material guide channel 401 can be transported to the nozzle 110 via the throat 210.

[0032] In addition, the outside of the material guide tube assembly 400 may have an external thread. The heat dissipation assembly 300 may be provided with an internal thread corresponding to the external thread. The heat dissipation assembly 300 may be fixed to the material guide tube assembly 400 by a threaded connection. When the heat dissipation assembly 300 and the material guide channel 401 are threadedly connected, the material guide channel 401 may be connected to the consumable channel 211.

[0033] According to one or more embodiments of the present application, the heat dissipation assembly 300 may be spaced apart from the heating assembly 150. Specifically, the heat dissipation assembly 300 may be spaced apart from the nozzle 110 and the heating assembly 150. In this case, by increasing the distance between the heat dissipation assembly 300 and the heating assembly 150, the difficulty of transferring the heat generated by the heating assembly 150 to the heat dissipation assembly 300 is increased, which is conducive to the heat dissipation assembly 300 and the heating assembly 150 being independent of each other and working normally.

[0034] According to one or more embodiments of the present application, the heat dissipation assembly 300 can be relatively fixed to the nozzle 110 and the heating assembly 150. In some embodiments, the heating assembly 150 can be fixedly disposed on the heat dissipation assembly 300 so that the two remain relatively fixed. In other embodiments, the heating assembly 150 can be fixedly disposed on other structures outside the heat dissipation assembly 300 and relatively fixed to the heat dissipation assembly 300.

[0035] According to one or more embodiments of the present application, the extrusion device 1 further includes a connector 350. The connector 350 is located in the interval between the heating component 150 and the heat dissipation component 300, and one end of the connector 350 is connected to the heating component 150, and the other end of the connector 350 is connected to the heat dissipation component 300, so that the heating component 150 is fixed to the heat dissipation component 300 through the connector 350. For example, the connector 350 can be a screw with low thermal conductivity (such as a plastic screw), which can be inserted into the heating component 150, and after passing through the interval between the heating component 150 and the heat dissipation component 300, it is locked in the corresponding threaded hole of the heat dissipation component 300.

[0036] The connecting member 350 may be a columnar structure, which is helpful to reduce the heat transfer of the connecting member 350. The number of the connecting members 350 may be 2, 3, 4 or more. However, it should be noted that the more the number of the connecting members 350, the greater the risk of the heat of the heating element being transferred to the heating component 150 through the connecting member 350. If the number of the connecting members 350 is too small, the heating component 150 may not be fixed firmly enough.

[0037] See also Figure 6 , Figure 7 and Figure 8 According to one or more embodiments of the present application, the throat assembly 200 may further include an elastic member 220. The elastic member 220 is connected to the throat 210. The throat 210 has a first end and a second end opposite to each other in its extension direction. The first end is inserted into the nozzle 110 and communicates with the nozzle 110, and at least a portion of the throat 210 near the first end is located inside the heating assembly 150. In other words, the first end of the throat 210 is located inside the heating assembly 150; or the first end of the throat 210 is passed through the heating assembly 150, and a portion of the throat 210 near the first end is located inside the heating assembly 150. The second end is inserted into the heat dissipation assembly 300, and the throat 210 is elastically connected to the heat dissipation assembly 300 in the extension direction through the elastic member 220. The elastic member 220 may be between the first end and the second end of the throat 210. Further, the first end is inserted into the nozzle 110 and abuts against the nozzle 110 in the extension direction.

[0038] In some embodiments, the elastic member 220 may be located inside the heat dissipation assembly 300 . In other embodiments, the elastic member 220 may extend from the inside of the heat dissipation assembly 300 to the space between the heating assembly 150 and the heat dissipation assembly 300 .

[0039] In the above manner, the first end of the throat 210 is rigidly connected to the nozzle 110, so that the first end of the nozzle 110 can be reliably and accurately positioned, and the other end is elastically fixed to the heat dissipation assembly 300 through the elastic member 220. The elastic member 220 can adaptively undergo elastic deformation during the assembly process to compensate for the manufacturing errors of the throat 210 or the heat dissipation assembly 300, thereby making the throat 210 not easily squeezed or shaken.

[0040] Specifically, during the assembly process, the heating component 150 and the heat dissipation component 300 need to be close to each other along the extension direction of the throat 210 for assembly. By setting the elastic member 220, during the process of the heating component 150 and the heat dissipation component 300 approaching each other along the extension direction of the throat 210, the elastic member 220 can abut against the heat dissipation component 300 and undergo elastic deformation. The elastic force of the elastic member 220 after the elastic deformation can limit the heating component 150 and the heat dissipation component 300 from continuing to approach each other, thereby achieving the effect of assembly positioning.

[0041] In addition, during the assembly process, the deformation amount of the elastic member 220 can adaptively change so that the relative positions of the heating component 150 and the heat dissipation component 300 can be fine-tuned, which helps the throat 210 ignore manufacturing errors and reasonably assemble and connect with the heating component 150 and the heat dissipation component 300 respectively, thereby reducing production difficulty and improving production efficiency.

[0042] See also Figure 7 or Figure 8 According to one or more embodiments of the present application, the nozzle 110 may include an insertion groove 120 connected to the nozzle channel 111. A support table 121 facing the insertion groove 120 is formed at the connection point between the nozzle channel 111 and the insertion groove 120, and the first end abuts against the support table 121. When the throat tube 210 is inserted into the insertion groove 120 in the nozzle 110, the consumable channel 211 of the throat tube 210 is connected to the nozzle channel 111. The support table 121 can provide a reference for the first end of the throat tube 210 to position the throat tube 210.

[0043] Optionally, the length of the nozzle 110 along the extension direction of the throat 210 is in the range of 25 mm to 30 mm, for example, the length of the nozzle 110 along the extension direction of the throat 210 is in the range of 27 mm, which is conducive to sufficient heating of the consumables in the nozzle 110 .

[0044] Optionally, along the extension direction of the throat 210, the size range of the portion of the throat 210 inserted into the nozzle 110 is 4 mm to 6 mm, for example, the size of the portion of the throat 210 inserted into the nozzle 110 is 5 mm. This can ensure the connection stability between the throat 210 and the nozzle 110, and the heating area of ​​the throat 210 is also in a lower range.

[0045] See also Figure 7 or Figure 8 According to one or more embodiments of the present application, the throat 210 includes a first pipe section 212 and a second pipe section 213 connected to each other. The radial dimension of the first pipe section 212 is greater than the radial dimension of the second pipe section 213, so that the throat 210 is arranged in a stepped shaft shape. The radial dimension of the first pipe section 212 matches the radial dimension of the insertion groove 120. The first end can be located at the first pipe section 212, and the second end can be located at the second pipe section 213.

[0046] The elastic member 220 may be disposed on the second pipe section 213. When the elastic member 220 is disposed on the second pipe section 213, one end of the elastic member 220 may directly or indirectly abut against the heat dissipation assembly 300, and the other end may directly or indirectly abut against the step surface 214 between the first pipe section 212 and the second pipe section 213 of the throat 210. Thus, the elastic member 220 may be fixed, and the throat 210 and the heat dissipation assembly 300 may be elastically connected.

[0047] According to one or more embodiments of the present application, the elastic member 220 may be provided in a sleeve shape, and the elastic member 220 may be fixedly sleeved on the outer circumference of the throat 210. Thus, the elastic member 220 may be more reliably fixed to the throat 210.

[0048] See also Figure 8 According to one or more embodiments of the present application, the heat dissipation assembly 300 is provided with an annular support surface 301. The annular support surface 301 faces the end of the elastic member 220 away from the first end and surrounds the throat 210. The end of the elastic member 220 away from the first end is supported on the annular support surface 301. In this case, the elastic member 220 can be fixed between the stepped surface 214 and the annular support surface 301.

[0049] Optionally, the elastic member 220 is a plastic member. In this way, the elastic member 220 can bear the load along the extension direction of the throat 210 to be supported between the stepped surface 214 and the annular support surface 301, and the elastic member 220 can be supported between the outer peripheral wall of the throat 210 and the heat dissipation assembly 300 along the extension direction perpendicular to the throat 210, so that the elastic member 220 can play a guiding role during the assembly process, making it easier to insert the throat 210 into the heat dissipation assembly 300.

[0050] Optionally, the elastic member 220 is a silicone member or a rubber member.

[0051] According to one or more embodiments of the present application, the heat dissipation assembly 300 is provided with a first accommodating channel 302 and a second accommodating channel 303 that are connected to each other. The first accommodating channel 302 is farther away from the heating assembly 150 than the second accommodating channel 303. The throat 210 is inserted into the first accommodating channel 302 through the second accommodating channel 303. The elastic member 220 is disposed in the second accommodating channel 303. The annular support surface 301 is formed at the connection between the first accommodating channel 302 and the second accommodating channel 303, and faces the second accommodating channel 303. By providing the first accommodating channel 302 and the second accommodating channel 303, the above-mentioned annular support surface 301 can be formed.

[0052] According to one or more embodiments of the present application, the throat 210 may match the insertion slot 120. For example, the first pipe section 212 may be interference fit with the throat 210 in the insertion slot 120. Thus, the reliability of the connection between the throat 210 and the heat dissipation assembly 300 can be improved.

[0053] According to one or more embodiments of the present application, the throat assembly 200 includes a heat dissipation sleeve 330 sleeved on the throat 210. The heat dissipation sleeve 330 is sleeved on the outer circumference of the throat 210. Part of the heat dissipation sleeve 330 can be inserted into the heat dissipation assembly 300. As described above, part of the throat 210 may not be inserted into the heat dissipation assembly 300, and thus, the temperature of the part of the throat 210 not inserted into the heat dissipation assembly 300 may be relatively high. The heat dissipation sleeve 330 can be sleeved on the part of the throat 210 inserted into the heat dissipation assembly 300, and transfer the heat of the part to the heat dissipation assembly 300, which is beneficial to cooling the part not inserted into the heat dissipation assembly 300.

[0054] Optionally, along the extension direction of the throat 210, the distance between the heat dissipation sleeve 330 and the heating assembly 150 is 2 mm to 4 mm, for example, the distance between the heat dissipation sleeve 330 and the heating assembly 150 is 3 mm. In this way, the heat dissipation sleeve 330 can be arranged on a portion of the throat 210 away from the heating assembly 150 and the nozzle 110, and the heat dissipation sleeve 330 is conducive to transferring the heat of the throat 210 to the heat dissipation assembly 300, thereby improving the heat dissipation efficiency of the throat 210. The heat dissipation sleeve 330 and the heating assembly 150 are arranged at a distance, which can reduce the heat loss on the heating assembly 150 caused by the heat dissipation sleeve 330, and at the same time facilitate the rapid cooling of the consumables outside the nozzle 110.

[0055] According to one or more embodiments of the present application, the elastic member 220 and the heat dissipation sleeve 330 are sleeved on the second pipe section 213, and the heat dissipation sleeve 330 is abutted between the first pipe section 212 and the elastic member 220, and the heat dissipation sleeve 330 is used to support the elastic member 220. That is, the elastic member 220 can be indirectly abutted against the stepped surface 214 through the heat dissipation sleeve 330. In addition, the heat dissipation sleeve 330 is arranged between the elastic member 220 and the first pipe section 212, which can also reduce the length of the elastic member 220 and the length of the first pipe section 212 to a certain extent.

[0056] Optionally, the elastic member 220 is formed by injection molding or encapsulation process at the end of the heat dissipation sleeve 330 away from the heating component 150. Alternatively, the elastic member 220 can be glued to the end of the heat dissipation sleeve 330 away from the heating component 150 by glue. In this way, assembly can be facilitated while reducing the risk of displacement of the elastic member.

[0057] According to one or more embodiments of the present application, a beveled positioning member 340 is further included which is sleeved on the heat dissipation sleeve 330. The beveled positioning member 340 includes a first portion which can be inserted into the heat dissipation assembly 300 and a second portion which cannot be inserted into the heat dissipation assembly 300. Specifically, the first portion of the beveled positioning member 340 can be inserted into the second accommodating channel 303. For example, the outer diameter of the second portion can be greater than the radial dimension of the second accommodating channel 303. The outer diameter of the first portion can be less than or equal to the radial dimension of the second accommodating channel 303.

[0058] In summary, the extrusion device 1 of the present application includes a nozzle 110, a heating component 150, a heat dissipation component 300 and a throat assembly 200, the heating component 150 is fixedly arranged on the nozzle 110; the heat dissipation component 300 is spaced apart from the nozzle 110 and relatively fixed; the throat assembly 200 includes a throat 210 and an elastic member 220, the elastic member 220 connects the throat 210, the throat 210 has a first end and a second end opposite to each other in its extension direction, the first end is inserted into the nozzle 110 and abuts against the nozzle 110 in the extension direction, the second end is inserted into the heat dissipation component 300, and the throat 210 is elastically connected to the heat dissipation component 300 in the extension direction through the elastic member 220.

[0059] In the above manner, the first end of the throat 210 is rigidly connected to the nozzle 110, so that the first end of the nozzle 110 can be reliably and accurately positioned, and the other end is elastically fixed to the heat dissipation assembly 300 through the elastic member 220. The elastic member 220 can adaptively undergo elastic deformation during the assembly process to compensate for the manufacturing errors of the throat 210 or the heat dissipation assembly 300, thereby making the throat 210 not easily squeezed or shaken.

[0060] The above descriptions are merely embodiments of the present application and are not intended to 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 applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An extrusion device, characterized in that: include: nozzle; A heating component, the nozzle is fixedly arranged on the heating component, wherein the heating component is sleeved on the outer periphery of the nozzle; A heat dissipation component is spaced apart from the heating component and relatively fixed; A throat assembly, comprising a throat and an elastic member, wherein the elastic member is connected to the throat, the throat having a first end and a second end opposite to each other in the extension direction thereof; the first end is inserted into the nozzle and communicated with the nozzle, and at least a portion of the throat close to the first end is located inside the heating assembly, the second end is inserted into the heat dissipation assembly, and the throat is elastically connected to the heat dissipation assembly in the extension direction via the elastic member; And a material guiding pipe component is provided with a material guiding channel, and the heat dissipation component is arranged on the material guiding pipe component so that the material guiding channel is connected with the throat.

2. The extrusion device according to claim 1, characterized in that The nozzle is provided with a nozzle channel and an insertion groove communicating with the nozzle channel, a support surface facing the insertion groove is formed at the connection between the nozzle channel and the insertion groove, and the first end abuts against the support surface.

3. The extrusion device according to claim 1, characterized in that: The throat includes a first pipe section and a second pipe section connected to each other, the radial dimension of the first pipe section is greater than the radial dimension of the second pipe section, so that the throat is arranged in a stepped shaft shape; the first end is located in the first pipe section, and the second end is located in the second pipe section; the elastic member is arranged in the second pipe section.

4. The extrusion device according to claim 3, characterized in that: The nozzle is provided with an insertion groove, and the first pipe section is interference-fitted with the throat pipe in the insertion groove.

5. The extrusion device according to claim 1, characterized in that: The elastic member is fixedly sleeved on the outer periphery of the throat; the heat dissipation component is provided with an annular support surface, which faces the end of the elastic member away from the first end and surrounds the throat; the end of the elastic member away from the first end is supported on the annular support surface.

6. The extrusion device according to claim 5, characterized in that The heat dissipation component is provided with a first accommodating channel and a second accommodating channel which are connected to each other, the first accommodating channel is farther away from the heating component than the second accommodating channel, the throat is inserted into the first accommodating channel through the second accommodating channel, and the elastic member is arranged in the second accommodating channel; The annular supporting surface is formed at the connection point between the first accommodating channel and the second accommodating channel and faces the second accommodating channel.

7. The extrusion device according to claim 1, characterized in that The throat assembly comprises a heat dissipation sleeve sleeved on the throat, the heat dissipation sleeve sleeves the outer periphery of the throat, and at least a part of the heat dissipation sleeve is inserted into the heat dissipation assembly.

8. The extrusion device according to claim 7, characterized in that It also includes an inclined surface positioning member sleeved on the heat dissipation sleeve, and the inclined surface positioning member includes a first part that can be inserted into the heat dissipation component and a second part that cannot be inserted into the heat dissipation component.

9. The extrusion device according to claim 1, characterized in that: The extrusion device also includes a connecting piece, which is located in the interval between the heating component and the heat dissipation component, and one end of the connecting piece is connected to the heating component, and the other end is connected to the heat dissipation component, so that the heating component is fixed to the heat dissipation component through the connecting piece.

10. The extrusion device according to claim 1, characterized in that It also includes a material guide tube assembly with a material guide channel. The heat dissipation assembly is arranged on the material guide tube assembly and connects the material guide channel with the throat, so that the consumables inside the material guide channel can be transported to the nozzle through the throat.

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