Heat dissipation device for 3D printer and 3D printer

Abstract

The invention relates to a heat dissipation device for a 3D printer and the 3D printer, and belongs to the technical field of 3D printers, the heat dissipation device is arranged in a 3D printer body and used for conducting heat dissipation during material conveying, and the heat dissipation device comprises a loading structure, a liquid conveying structure and a centrifugal structure which are arranged on the 3D printer body; the liquid conveying structure and the centrifugal structure are provided with a transmission structure, and the centrifugal structure is provided with a connecting rod connected with the loading structure. The loading structure comprises two sliding sleeves distributed up and down, three supporting rods hinged to the outer surface of the bottom sliding sleeve and supporting arms hinged between the top sliding sleeve and the three supporting rods, and sealing cloth is fixed among the three supporting rods. The heat dissipation device for the 3D printer and the 3D printer have the advantages of being efficient in heat dissipation, automatic in control and high in adaptability, and the problem that the heat dissipation mode that a cooling water pipe makes direct contact with the outer surface of a nozzle easily causes thermal stress of the nozzle, and then deformation or cracking is caused is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a heat dissipation device for a 3D printer and a 3D printer. Background Art

[0002] As one of the core components of a 3D printer, the nozzle of a 3D printer largely determines the quality of molding. The smoothness of the filament flowing out of the extruder and the temperature of the filament directly affect the accuracy of the 3D printed model. However, if the nozzle temperature is too high, other parts will be dissolved and burned. After printing is completed, it needs to be cooled quickly. Therefore, a heat dissipation device is needed to control the nozzle temperature within a certain range.

[0003] After searching, the Chinese invention patent publication number is CN105589540A, which discloses a 3D printer nozzle spiral water-cooling heat dissipation device, whose structure includes an upper fixed platform, a lower fixed platform, a water cooling sleeve, a water inlet pipe, a water outlet pipe, an adapter, a water tank and a water pump. The application is fixed by the upper and lower fixed platforms. The water pump is provided with a water outlet, which is connected to the water pipe through an adapter to supply water to the water cooling sleeve. The water pump is provided with an on / off key and up and down keys. The up and down keys can adjust the water circulation rate of the water pump to control the temperature of the printer nozzle. The upper part of the water tank is the water inlet, which is connected to the pipeline through an adapter to receive water from the water cooling sleeve to realize water circulation.

[0004] The above patent also has the following defects: when the nozzle dissipates heat, a circle of cooling water pipe is installed around its outer surface. Although it can effectively dissipate heat, some substances are likely to remain on the outer surface of the nozzle. After long-term use, scale may form on the outer surface of the nozzle. The presence of scale will affect the heat dissipation effect and increase the difficulty of cleaning; at the same time, since the cooling water pipe is in direct contact with the outer surface of the nozzle, rapid cooling will cause thermal stress in the nozzle, which will cause deformation or cracking problems, which will affect the accuracy and extrusion effect of the nozzle, thereby affecting the printing quality.

[0005] Therefore, it is urgent to improve the heat dissipation to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a heat dissipation device for a 3D printer and a 3D printer, which have the advantages of efficient heat dissipation, automatic control and strong adaptability, and solve the problem that the heat dissipation method in which the cooling water pipe directly contacts the outer surface of the nozzle easily causes thermal stress in the nozzle, thereby causing deformation or cracking.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a heat dissipation device for a 3D printer, comprising a heat dissipation device arranged inside a 3D printer body for dissipating heat during material feeding, the heat dissipation device comprising a loading structure, an infusion structure and a centrifugal structure arranged on the 3D printer body, the infusion structure and the centrifugal structure are provided with a transmission structure, and a connecting rod connected to the loading structure is provided on the centrifugal structure, and a mounting platform is provided on the 3D printer body; The loading structure comprises two sliding sleeves distributed up and down, three support rods hinged to the outer surface of the bottom sliding sleeve, and a support arm hinged between the top sliding sleeve and the three support rods, and sealing cloths are fixed between the three support rods; The infusion structure includes a liquid storage tank fixed to the outside of the 3D printer body, an infusion tube fixed to the upper surface of the mounting platform, and an annular nozzle arranged below the mounting platform. Both ends of the infusion tube are fixedly connected with connecting tubes, and the two connecting tubes are fixedly connected to the liquid storage tank and the annular nozzle respectively.

[0008] Furthermore, a connecting rod is fixed between the annular nozzle and the mounting platform by bolts, and the interior of the annular nozzle is hollow.

[0009] Furthermore, a plurality of spray holes distributed in an annular pattern are provided on the inner side of the annular spray pipe, and a nozzle is fixedly connected to the bottom side of the annular spray pipe.

[0010] Furthermore, the centrifugal structure includes a mounting seat arranged below the mounting platform, a rotating shaft fixed to the upper surface of the mounting seat and connected to the transmission structure, a connecting sleeve and a rotating sleeve sleeved on the outer surface of the rotating shaft, a swing arm hinged on the outer surface of the rotating sleeve, a gravity ball threadedly mounted on one end of the swing arm away from the rotating sleeve, and a connecting rod hinged between the mounting seat and the swing arm.

[0011] Furthermore, the rotating sleeve bearing is installed on the outer surface of the connecting sleeve, and a connecting rod connected to the top sliding sleeve is fixed on the outer surface of the connecting sleeve.

[0012] Furthermore, a mounting frame is fixed to the lower surface of the mounting platform, and the mounting seat is rotatably mounted on the outer surface of the mounting frame.

[0013] Furthermore, the number of the connecting rod, the swing arm and the gravity ball is two, and a return spring surrounding the outside of the rotating shaft is rotatably installed between the connecting sleeve and the mounting seat.

[0014] Furthermore, the transmission structure includes a rotating fan plate rotatably installed inside the infusion tube and a transmission member arranged on one side of the rotating fan plate, and the transmission member includes a transmission shaft fixed to one side of the rotating fan plate, a transmission gear fixed to the other end of the transmission shaft, and a driven gear fixed to the top of the rotating shaft and meshing with the transmission gear.

[0015] Another technical problem to be solved by the present invention is to provide a 3D printer, which also includes a 3D printer body, wherein the 3D printer body includes a base, a casing fixedly mounted on the upper surface of the base, a printing nozzle arranged inside the casing, an XY axis linear module and a storage table, an observation window is installed on the side wall of the casing, the mounting table is fixed to the top end of the printing nozzle, and one side of the mounting table is connected to the XY axis linear module.

[0016] Furthermore, a storage table located below the printing nozzle is fixed inside the casing, the bottom sliding sleeve is fixed to the outer surface of the printing nozzle, and the top sliding sleeve is sleeved on the outer surface of the printing nozzle, a scraping sleeve that fits the outer surface of the printing nozzle is installed on the inner side of the top sliding sleeve, and the liquid storage tank is fixed to the outer surface of the casing.

[0017] Compared with the prior art, the present invention provides a heat dissipation device for a 3D printer and a 3D printer, which have the following beneficial effects: 1. The heat dissipation device for the 3D printer and the 3D printer form a flexible shell that can wrap the printing nozzle through the combination of the upper and lower sliding sleeves, the support rod and the support arm. When the heat dissipation device is started, the shell can effectively limit the coolant or other heat dissipation medium around the printing nozzle, thereby improving the heat dissipation efficiency.

[0018] 2. The heat dissipation device for a 3D printer and the 3D printer, through the cooperation of the centrifugal structure and the transmission structure, the loading structure can be automatically opened or closed according to the heat dissipation demand. When heat dissipation is required, the centrifugal structure drives the top sliding sleeve to move through the connecting rod, so that the loading structure is opened to allow the heat dissipation medium to enter; when heat dissipation is completed or not required, the loading structure is automatically closed to maintain a stable working environment of the printing nozzle, thereby realizing the automatic adjustment function.

[0019] 3. The heat dissipation device and the 3D printer for the 3D printer drive the rotating fan plate to rotate by infusing liquid into the infusion tube, and then drive the rotating shaft to rotate through the transmission gear and the driven gear. This chain reaction eventually opens the loading structure, allowing the liquid to be evenly sprayed through the annular nozzle, thereby improving the efficiency and uniformity of the infusion.

[0020] 4. The heat dissipation device for the 3D printer and the 3D printer, through the design of the swing arm and the gravity ball, enables the structure to automatically adjust the opening degree of the swing arm according to the rotation speed and the size of the centrifugal force, thereby controlling the opening degree of the loading structure. This design increases the flexibility of the system and the adaptability to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural stereogram of a heat dissipation device for a 3D printer and a 3D printer according to the present invention; Figure 2A structural stereogram of a heat dissipation device for a 3D printer and a loading structure, an annular nozzle and a centrifugal structure in the 3D printer according to the present invention; Figure 3 A structural stereogram of a heat dissipation device for a 3D printer and a loading structure in a 3D printer according to the present invention; Figure 4 It is a schematic structural diagram of a heat dissipation device for a 3D printer and a support rod in a 3D printer according to the present invention; Figure 5 It is a schematic structural diagram of a heat dissipation device for a 3D printer and a scraper sleeve in a 3D printer according to the present invention; Figure 6 It is a structural schematic diagram of a heat dissipation device for a 3D printer and a transmission structure in a 3D printer of the present invention; Figure 7 It is a schematic structural diagram of a heat dissipation device for a 3D printer and a centrifugal structure and a transmission structure in the 3D printer of the present invention; Figure 8 The present invention is a cross-sectional view of the structure of a heat dissipation device for a 3D printer and an annular nozzle in the 3D printer.

[0022] In the figure: 1. 3D printer body; 101. base; 102. housing; 103. printing nozzle; 104. XY axis linear module; 105. storage table; 106. observation window; 2. loading structure; 201. support rod; 202. sealing cloth; 203. sliding sleeve; 204. support arm; 205. scraper sleeve; 3. liquid storage tank; 4. mounting table; 5. infusion tube; 6. annular nozzle; 61. connecting rod; 62. nozzle hole; 6 3. Nozzle; 7. Connecting pipe; 8. Centrifugal structure; 801. Mounting seat; 802. Rotating shaft; 803. Connecting sleeve; 804. Rotating sleeve; 805. Swing arm; 806. Gravity ball; 807. Connecting rod; 808. Return spring; 9. Transmission structure; 901. Rotating fan plate; 902. Transmission member; 9021. Transmission shaft; 9022. Transmission gear; 9023. Driven gear; 10. Connecting rod; 11. Mounting frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0024] like Figure 1As shown, a 3D printer in this embodiment includes a 3D printer body 1, the 3D printer body 1 includes a base 101, a casing 102 fixedly installed on the upper surface of the base 101, a printing nozzle 103 arranged inside the casing 102, an XY axis linear module 104 and a storage table 105, and an observation window 106 is installed on the side wall of the casing 102.

[0025] It should be noted that the XY axis linear module 104 is a conventional technology known to the public in the prior art, so its specific structure and working principle will not be described in detail in this article. Example

[0026] like Figures 1 to 8 As shown, in order to achieve heat dissipation of the printing nozzle 103, a heat dissipation device for a 3D printer in this embodiment includes a heat dissipation device arranged inside the 3D printer body 1 for dissipating heat during material feeding, and the heat dissipation device includes a loading structure 2, an infusion structure and a centrifugal structure 8 arranged outside the printing nozzle 103, the infusion structure and the centrifugal structure 8 are provided with a transmission structure 9, and the centrifugal structure 8 is provided with a connecting rod 10 connected to the loading structure 2, the mounting platform 4 is fixed to the top of the printing nozzle 103, and one side of the mounting platform 4 is connected to the XY axis linear module 104.

[0027] like Figures 1 to 5 As shown, the loading structure 2 includes two sliding sleeves 203 distributed up and down, three struts 201 hinged to the outer surface of the bottom sliding sleeve 203, and a support arm 204 hinged between the top sliding sleeve 203 and the three struts 201, and a sealing cloth 202 is fixed between the three struts 201. The sealing cloth 202 fixed between the struts 201 ensures the sealing of the loading structure 2 when it is closed, and prevents the leakage of the heat dissipation medium. Specifically, the bottom sliding sleeve 203 is fixed to the outer surface of the printing nozzle 103, and the top sliding sleeve 203 is sleeved on the outer surface of the printing nozzle 103, and the inner side of the top sliding sleeve 203 is sleeved and installed with a scraper sleeve 205 that fits the outer surface of the printing nozzle 103. The loading structure 2 forms a flexible shell that can wrap the printing nozzle 103 through the combination of the upper and lower sliding sleeves 203, the struts 201, and the support arm 204. When the heat dissipation device is activated, the housing can effectively confine the coolant or other heat dissipation medium around the print nozzle 103, thereby improving the heat dissipation efficiency.

[0028] In addition, the sealing cloth 202 can be made of a material that is resistant to high temperatures, corrosion-resistant, and has good elasticity, such as any one of silicone rubber, fluororubber, or polytetrafluoroethylene. These materials can maintain stable sealing performance in a high temperature environment, and have good chemical corrosion resistance and wear resistance. The scraper sleeve 205 needs to have good wear resistance, high temperature resistance, and elasticity to ensure that impurities on the outer surface of the print nozzle 103 can be effectively scraped off for a long time. Therefore, a wear-resistant and scratch-resistant resin material or a metal alloy material can be selected to make the scraper sleeve 205. Among them, the wear-resistant and scratch-resistant resin material has excellent wear resistance and scratch resistance, and has good mechanical strength and detail reproduction ability; while the metal alloy material has higher high temperature resistance and strength, but may require special treatment on the surface to improve its wear resistance and corrosion resistance.

[0029] It is worth mentioning that the scraper sleeve 205 on the inner side of the top sliding sleeve 203 fits the outer surface of the printing nozzle 103. This design not only helps to keep the printing nozzle 103 clean, but also can enhance the heat dissipation effect to a certain extent by scraping off impurities or residues that may be attached to its surface, because the scraper sleeve 205 can serve as a heat conduction bridge between the heat dissipation medium and the printing nozzle 103. A drain valve is installed on the sealing cloth 202 to discharge the coolant after heat dissipation.

[0030] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, the liquid infusion structure includes a liquid storage tank 3 fixed to the outer surface of the housing 102, a liquid infusion pipe 5 fixed to the upper surface of the mounting platform 4, and an annular nozzle 6 arranged below the mounting platform 4. Both ends of the liquid infusion pipe 5 are fixedly connected with connecting pipes 7, and the two connecting pipes 7 are fixedly connected with the liquid storage tank 3 and the annular nozzle 6 respectively. Among them, a connecting rod 61 is fixed between the annular nozzle 6 and the mounting platform 4 by bolts, the inside of the annular nozzle 6 is hollow, and a plurality of annularly distributed spray holes 62 are opened on the inner side of the annular nozzle 6, and a nozzle 63 is fixedly connected to the bottom side of the annular nozzle 6. The connecting pipe 7 connected to the liquid storage tank 3 is a hose.

[0031] To realize automatic opening and closing of the loading structure 2, Figure 2 , Figure 6 and Figure 7As shown, the centrifugal structure 8 includes a mounting seat 801 arranged below the mounting platform 4, a rotating shaft 802 fixed to the upper surface of the mounting seat 801 and connected to the transmission structure 9, a connecting sleeve 803 and a rotating sleeve 804 sleeved on the outer surface of the rotating shaft 802, a swing arm 805 hinged on the outer surface of the rotating sleeve 804, a gravity ball 806 threadedly mounted on one end of the swing arm 805 away from the rotating sleeve 804, and a connecting rod 807 hinged between the mounting seat 801 and the swing arm 805, and the outer surface of the connecting sleeve 803 is fixed with a connecting rod 10 connected to the top sliding sleeve 203. The bearing of the rotating sleeve 804 is installed on the outer surface of the connecting sleeve 803. When the rotating shaft 802 rotates, the mounting seat 801 at the bottom thereof rotates accordingly and drives the swing arm 805 to rotate synchronously through the connecting rod 807. The rotation of the swing arm 805 will generate centrifugal force due to the weight of the gravity ball 806, so that the swing arm 805 expands outward and drives the connecting sleeve 803 to move downward. The connecting sleeve 803 moves downward and drives the top sliding sleeve 203 to move through the connecting rod 10, thereby opening the loading structure 2. Specifically, a mounting frame 11 is fixed on the lower surface of the mounting platform 4, and the mounting seat 801 is rotatably installed on the outer surface of the mounting frame 11. The number of the connecting rod 807, the swing arm 805 and the gravity ball 806 are all two. A reset spring 808 is rotatably installed between the connecting sleeve 803 and the mounting seat 801 and surrounds the outside of the rotating shaft 802. The reset spring 808 between the connecting sleeve 803 and the mounting seat 801 ensures that the system can be restored to the initial state after stopping work, that is, the loading structure 2 is closed. This design improves the stability and reliability of the system.

[0032] It should be noted that the design of the swing arm 805 and the gravity ball 806 in the centrifugal structure 8 enables the structure to automatically adjust the opening degree of the swing arm 805 according to the rotation speed and the magnitude of the centrifugal force, thereby controlling the opening degree of the loading structure 2. This design increases the flexibility of the system and its adaptability to different working conditions. The moving distance of the centrifugal structure 8 is adapted to the opening size of the loading structure 2.

[0033] To realize the driving of the centrifugal structure 8, as Figure 6 and Figure 7 As shown, the transmission structure 9 includes a rotating fan plate 901 rotatably mounted inside the infusion tube 5 and a transmission member 902 disposed on one side of the rotating fan plate 901, and the transmission member 902 includes a transmission shaft 9021 fixed to one side of the rotating fan plate 901, a transmission gear 9022 fixed to the other end of the transmission shaft 9021, and a driven gear 9023 fixed to the top of the rotating shaft 802 and meshing with the transmission gear 9022. When the liquid in the infusion tube 5 flows, the rotating fan plate 901 is driven to rotate, and then the rotating shaft 802 is driven to rotate through the transmission gear 9022 and the driven gear 9023. This chain reaction eventually causes the loading structure 2 to open, allowing the liquid to be evenly sprayed through the annular nozzle 6, thereby improving the efficiency and uniformity of the infusion.

[0034] The working principle of the above embodiment is: When the print nozzle 103 needs to be cooled, the coolant enters the annular nozzle 6 from the liquid storage tank 3 through the liquid infusion tube 5. The annular nozzle 6 sprays the coolant into the loading structure 2 through the nozzle hole 62 and the nozzle 63 to cool the print nozzle 103. At the same time, the rotating fan plate 901 in the liquid infusion tube 5 rotates due to the flow of the coolant, and drives the rotating shaft 802 of the centrifugal structure 8 to rotate through the transmission member 902. When the rotating shaft 802 rotates, the connecting sleeve 803 moves downward through the centrifugal action of the connecting rod 807 and the swing arm 805, and the top sliding sleeve 203 is displaced through the connecting rod 10, thereby opening the loading structure 2. When the coolant stops flowing or the flow rate decreases, the reset spring 808 resets the centrifugal structure 8, and the loading structure 2 is retracted, the sealing plug on the sealing cloth 202 is opened, and the coolant is discharged and collected.

[0035] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical connection methods. Any connection method can be implemented as long as it can achieve its beneficial effects. In addition, the electrical components appearing in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. The technicians in this field can control the electrical components through simple programming, and the existing disclosed power connection technology is also common knowledge in this field, so the specific structural composition and working principle will not be described in detail in this embodiment.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation device for a 3D printer, characterized in that: The invention comprises a heat dissipation device arranged inside a 3D printer body (1) for dissipating heat during material feeding, the heat dissipation device comprising a loading structure (2), an infusion structure and a centrifugal structure (8) arranged on the 3D printer body (1), the infusion structure and the centrifugal structure (8) being provided with a transmission structure (9), and the centrifugal structure (8) being provided with a connecting rod (10) connected to the loading structure (2), and a mounting platform (4) being provided on the 3D printer body (1); The loading structure (2) comprises two sliding sleeves (203) distributed above and below, three support rods (201) hinged to the outer surface of the bottom sliding sleeve (203), and a support arm (204) hinged between the top sliding sleeve (203) and the three support rods (201), and sealing cloths (202) are fixed between the three support rods (201); The liquid infusion structure comprises a liquid storage tank (3) fixed to the outside of a 3D printer body (1), a liquid infusion tube (5) fixed to the upper surface of a mounting platform (4), and an annular nozzle (6) arranged below the mounting platform (4), wherein both ends of the liquid infusion tube (5) are fixedly connected to connecting tubes (7), and the two connecting tubes (7) are fixedly connected to the liquid storage tank (3) and the annular nozzle (6), respectively.

2. A heat dissipation device for a 3D printer according to claim 1, characterized in that: A connecting rod (61) is fixed between the annular nozzle (6) and the mounting platform (4) via bolts, and the interior of the annular nozzle (6) is hollow.

3. A heat dissipation device for a 3D printer according to claim 1, characterized in that: A plurality of annularly distributed spray holes (62) are provided on the inner side of the annular spray pipe (6), and a nozzle (63) is fixedly connected to the bottom side of the annular spray pipe (6).

4. A heat dissipation device for a 3D printer according to claim 1, characterized in that: The centrifugal structure (8) comprises a mounting seat (801) arranged below the mounting platform (4), a rotating shaft (802) fixed to the upper surface of the mounting seat (801) and connected to the transmission structure (9), a connecting sleeve (803) and a rotating sleeve (804) sleeved on the outer surface of the rotating shaft (802), a swing arm (805) hinged on the outer surface of the rotating sleeve (804), a gravity ball (806) threadedly mounted on one end of the swing arm (805) away from the rotating sleeve (804), and a connecting rod (807) hinged between the mounting seat (801) and the swing arm (805).

5. A heat dissipation device for a 3D printer according to claim 4, characterized in that: The bearing of the rotating sleeve (804) is mounted on the outer surface of the connecting sleeve (803), and a connecting rod (10) connected to the top sliding sleeve (203) is fixed on the outer surface of the connecting sleeve (803).

6. A heat dissipation device for a 3D printer according to claim 5, characterized in that: A mounting frame (11) is fixed to the lower surface of the mounting platform (4), and the mounting seat (801) is rotatably mounted on the outer surface of the mounting frame (11).

7. A heat dissipation device for a 3D printer according to claim 6, characterized in that: The number of the connecting rod (807), the swing arm (805) and the gravity ball (806) is two each, and a return spring (808) surrounding the outside of the rotating shaft (802) is rotatably mounted between the connecting sleeve (803) and the mounting seat (801).

8. A heat dissipation device for a 3D printer according to claim 7, characterized in that: The transmission structure (9) comprises a rotating fan plate (901) rotatably mounted inside the infusion tube (5) and a transmission member (902) arranged on one side of the rotating fan plate (901); the transmission member (902) comprises a transmission shaft (9021) fixed to one side of the rotating fan plate (901), a transmission gear (9022) fixed to the other end of the transmission shaft (9021), and a driven gear (9023) fixed to the top end of the rotating shaft (802) and meshing with the transmission gear (9022).

9. A 3D printer, comprising the heat dissipation device for a 3D printer according to claim 1, characterized in that: The 3D printer body (1) further comprises a machine base (101), a casing (102) fixedly mounted on the upper surface of the machine base (101), a printing nozzle (103) arranged inside the casing (102), an XY axis linear module (104) and a storage table (105), an observation window (106) being mounted on the side wall of the casing (102), the mounting table (4) being fixed to the top end of the printing nozzle (103), and one side of the mounting table (4) being connected to the XY axis linear module (104).

10. A 3D printer according to claim 9, characterized in that: A storage table (105) located below the printing nozzle (103) is fixed inside the housing (102); the bottom sliding sleeve (203) is fixed to the outer surface of the printing nozzle (103); the top sliding sleeve (203) is sleeved on the outer surface of the printing nozzle (103); a scraping sleeve (205) that fits the outer surface of the printing nozzle (103) is sleeved on the inner side of the top sliding sleeve (203); and the liquid storage tank (3) is fixed to the outer surface of the housing (102).

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