Hot bed device of 3D printer and 3D printer

Abstract

The utility model discloses a hot bed device of a 3D printer and the 3D printer, the hot bed device is arranged on the side, facing a nozzle of the 3D printer, of a base of the 3D printer, and the hot bed device is slidably connected with the base; wherein a first nozzle wiping device is arranged in the hot bed device. By implementing the application, the residual consumables can be prevented from being manually removed, and the risk that a user is scalded when the residual consumables of the nozzle are wiped is effectively reduced.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on August 24, 2023, with application number 202322315142.4 and application name “A hot bed device for a 3D printer and a 3D printer”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of 3D printing technology, and in particular to a hot bed device of a 3D printer and a 3D printer. Background Art

[0003] 3D printer (also known as three-dimensional printer or stereo printer) is a kind of rapid prototyping process equipment. The 3D printing technology that 3D printers can currently use is fused deposition modeling (FDM). FDM is a technology that constructs three-dimensional objects by printing layer by layer using materials such as powdered metal or plastic based on digital models. In specific implementation, a 3D printer using FDM technology uses a feeding device to supply hot-melt filamentary material (also called consumables) to the nozzle, and the consumables are heated to a molten state in the nozzle. The nozzle can then extrude the molten consumables onto the printing plate while moving along the printing path of the 3D printer, printing out three-dimensional objects layer by layer.

[0004] Therefore, there are residual consumables around the nozzles. These residual consumables accumulate over a long period of time and stick to the surface of the printed product during printing, causing defects in the printed product. The existing technology heats the nozzle to soften the residual consumables and then removes them manually, which results in low efficiency in removing the residual consumables around the nozzles and the risk of scalding the user. Summary of the invention

[0005] The present application proposes a hot bed device for a 3D printer and a 3D printer, which can improve the removal efficiency of residual consumables around a nozzle and have high safety.

[0006] In a first aspect, an embodiment of the present application provides a hot bed device of a 3D printer, wherein the hot bed device is disposed on a side of a base of the 3D printer facing a nozzle of the 3D printer, and the hot bed device is slidably connected to the base; wherein:

[0007] The hot bed device is provided with a first nozzle wiping device, and the first nozzle wiping device is used to wipe the residual consumables around the nozzle when contacting the nozzle.

[0008] The embodiment of the present application adds a nozzle wiping device to the hot bed device, which can be used to wipe the residual consumables around the nozzle, avoiding manual removal of the residual consumables, effectively improving the efficiency of removing the residual consumables around the nozzle, and having high safety.

[0009] In combination with the first aspect, in a first possible implementation, the shape of the nozzle is conical, and the first nozzle wiping device is used to wipe the residual consumables on the conical side portion of the nozzle. By implementing the embodiment of the present application, the first nozzle wiping device can clean the conical side portion of the nozzle, thereby improving the cleaning efficiency of the nozzle.

[0010] In combination with the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the hot bed device is further provided with a power interface, and the first nozzle wiping device and the power interface are located on the same side of the hot bed device. By implementing the embodiment of the present application, it is possible to achieve that only one side of the hot bed device needs to be processed during production, thereby improving the production efficiency of the hot bed device and making the layout reasonable and beautiful.

[0011] In combination with the first aspect or any one of the above possible implementations of the first aspect, in a third possible implementation, the nozzle is conical in shape; the hot bed device is further provided with a second nozzle wiping device, and the second nozzle wiping device is used to wipe the residual consumables at the conical tip of the nozzle when in contact with the nozzle. By implementing the embodiment of the present application, the conical tip of the nozzle can be wiped in a targeted manner, thereby improving the cleanliness of the printer nozzle during operation, thereby improving the efficiency of removing dirt from the printer nozzle.

[0012] In combination with the first aspect or any one of the above possible implementations of the first aspect, in a fourth possible implementation, the hot bed device is further provided with a power interface and a second nozzle wiping device; wherein the first nozzle wiping device, the second nozzle wiping device and the power interface are located on the same side of the hot bed device. Exemplarily, the second nozzle wiping device is arranged between the first nozzle wiping device and the power interface. In the embodiment of the present application, the first nozzle wiping device and the second nozzle wiping device are located on the same side of the hot bed device. When wiping the nozzle, the nozzle can be moved in a specific direction to achieve two nozzle wipings, the nozzle movement path is short, and the nozzle wiping efficiency is high.

[0013] In combination with the first aspect or any one of the above possible implementations of the first aspect, in a fifth possible implementation, the first wiping device includes a first base and a first wiping block; wherein the first wiping block is connected to the first base, and the first base is connected to the hot bed device. By implementing the embodiment of the present application, when the first wiping device is worn out, a detachable replacement of the first wiping device can be achieved. Moreover, when the first wiping block is worn out, the first wiping block can be replaced without replacing the first base, which is low in cost.

[0014] In combination with the fifth possible implementation of the first aspect, in a sixth possible implementation, a plurality of protrusions are provided on a surface of the first wiping block facing the nozzle. In the embodiment of the present application, there are gaps between the plurality of protrusions, and the nozzle rubs back and forth in the gaps between the protrusions, thereby wiping away the residual consumables on the conical side portion of the nozzle.

[0015] In combination with the third possible implementation of the first aspect or in combination with the fourth possible implementation of the first aspect, in a seventh possible implementation, the second wiping nozzle device includes a second base and a second wiping block; wherein the second wiping block is connected to the second base, and the second base is connected to the hot bed device. By implementing the embodiment of the present application, when the second wiping nozzle device is worn out, a detachable replacement of the second wiping nozzle device can be achieved. Moreover, when the second wiping block is worn out, the second wiping block can be replaced without replacing the second base, which is low in cost.

[0016] In combination with the first aspect, in a first possible implementation, a plurality of holes or a plurality of saw teeth are provided on the surface of the second wiping block facing the nozzle. The nozzle rubs back and forth on the plurality of holes or the plurality of saw teeth, thereby wiping away the residual consumables at the conical tip of the nozzle. By implementing the embodiment of the present application, the wiping efficiency of the nozzle tip can be improved.

[0017] In combination with the seventh possible implementation of the first aspect or in combination with the eighth possible implementation of the first aspect, in a ninth possible implementation, the second wiping block is a metal sheet. By implementing the embodiment of the present application, the durability of the second wiping block is improved on the basis of ensuring the wiping efficiency of the nozzle tip portion. In addition, based on the specific heat capacity characteristics of the metal, the consumables remaining in the nozzle can be effectively solidified, further improving the wiping efficiency of the second wiping block on the nozzle.

[0018] In a second aspect, an embodiment of the present application provides a 3D printer, comprising a base, a nozzle, and a hot bed device described in combination with the first aspect or in combination with any one of the above possible implementations of the first aspect, wherein the hot bed device is arranged on a side of the base facing the nozzle, and the hot bed device is slidably connected to the base.

[0019] It should be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of an application scenario of a 3D printer provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a hot bed device provided in an embodiment of the present application;

[0022] Figure 3 Another structural schematic diagram of the hot bed device provided in the embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a first mouth wiping device provided in an embodiment of the present application;

[0024] Figure 5 An exploded view of a first mouth wiping device provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of a first wiping block provided in an embodiment of the present application;

[0026] Figure 7 Another structural schematic diagram of the hot bed device provided in the embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of a second nozzle wiping device provided in an embodiment of the present application;

[0028] Fig. 9 An exploded view of a second mouth wiping device provided in an embodiment of the present application;

[0029] Fig.10 A schematic diagram of the structure of a second wiping block provided in an embodiment of the present application;

[0030] Fig.11 Another structural schematic diagram of the hot bed device provided in the embodiment of the present application;

[0031] Fig.12 This is another structural schematic diagram of the hot bed device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0033] See also Figure 1 , Figure 1 A schematic diagram of an application scenario of a 3D printer provided in an embodiment of the present application. Figure 1 As shown, the 3D printer 102 is connected to the feeding device 101 .

[0034] The feeding device 101 can suspend a material tray, in which consumables are wound. The feeding device 101 can provide the consumables to the 3D printer 102, or the consumables can be rewound to the material tray through the feeding device. That is, the feeding device can feed or return materials. Exemplarily, the feeding device 101 can also identify the material information of the consumables and send the material information of the consumables to the 3D printer 102.

[0035] The 3D printer 102 includes a print head 1021, wherein the print head 1021 includes a material guide unit 10211, a nozzle 10212, and an extrusion assembly disposed between the material guide unit 10211 and the nozzle 10212. During the feeding process of the feeding device 101, the consumable material passes through the material guide unit 10211 and then enters the extrusion assembly, and the extrusion assembly supplies the consumable material to the nozzle 10212; during the feeding process of the feeding device 101, the 3D printer 102 cuts off the consumable material in the print head 1021, and the extrusion assembly delivers the consumable material to the feeding device 101.

[0036] Optionally, the 3D printer 102 may, for example, cut the consumables between the extrusion assembly and the nozzle 10212 or may cut the consumables in the extrusion assembly, etc. The present application does not limit the position where the 3D printer cuts the consumables.

[0037] For example, Figure 1 As shown, the 3D printer 102 also includes a printing panel 1023, a hot bed device 1024, a base 1025a and a slider 1029a. Among them, the hot bed device 1024 is arranged on the side of the base 1025a facing the nozzle 10212, and the hot bed device 1024 has a heating function. The printing panel 1023 is arranged on the side of the hot bed device 1024 facing the nozzle 10212, and the heat of the hot bed device 1024 can be transferred to the printing panel 1023, and the nozzle 10212 can extrude the molten consumables on the printing panel 1023. Optionally, the 3D printer 102 also includes a base 1025b and a slider 1029b. It can be understood that the printing panel 1023 can also belong to the hot bed device 1024, for example, the hot bed device 1024 can include a hot bed (not shown in the figure) and a printing panel 1023. That is, the hot bed device in the present application may include a hot bed itself with a heating function, and may also include a hot bed and a printing panel located on the hot bed, which is not limited in the present application.

[0038] In a specific implementation, the 3D printer can adjust the temperature of the nozzle 10212 and the hot bed device 1024, adjust the temperature of the nozzle 10212 to heat the consumable to a molten state, and adjust the temperature of the hot bed device 1024 to adhere the consumable extruded by the nozzle 10212 to the printing panel 1023. The print head 1021 is slidably connected to the first guide rail 1026, and the print head 1021 can move along the length direction of the first guide rail 1026, that is, the print head 1021 is displaced relative to the printing panel 1023 along the length direction of the first guide rail 1026, and the hot bed device 1024 is slidably connected to the second guide rail 1027, and the hot bed device 1024 moves along the length direction of the second guide rail 1027, that is, the print head 1021 is displaced relative to the printing panel 1023 along the length direction of the second guide rail 1027, and the length direction of the second guide rail 1027 is perpendicular to the length direction of the first guide rail 1026. Furthermore, the first guide rail 1026 is slidably connected to the third guide rail 1028, and the 3D printer 102 can achieve displacement of the print head 1021 relative to the printing panel 1023 in a direction perpendicular to the length of the second guide rail 1027 and in a direction perpendicular to the length of the first guide rail 1026 by moving the first guide rail 1026 along the third guide rail 1028. That is, the 3D printer 102 can achieve three mutually perpendicular printing paths to print out a three-dimensional object.

[0039] In an embodiment of the present application, a nozzle wiping device is added to the hot bed device of the 3D printer. The nozzle wiping device can be used to wipe the residual consumables around the nozzle, avoiding manual removal of the residual consumables, effectively improving the removal efficiency of the residual consumables around the nozzle, and having high safety.

[0040] Combine the following Figures 2 to 12 The structure of the hot bed device is introduced in detail.

[0041] See also Figure 2 , Figure 2 This is the structural intention of the hot bed device provided in the embodiment of the present application. Figure 2 As shown, the hot bed device 204 includes a hot bed and a printing panel located above the hot bed. The hot bed device 204 is at least provided with a first nozzle wiping device 2041. The first nozzle wiping device 2041 can be used to wipe the residual consumables around the nozzle when it contacts the nozzle.

[0042] In some feasible implementations, the nozzle is conical in shape, and the first nozzle wiping device 2041 can wipe the residual consumables on the conical side of the nozzle. By implementing the embodiment of the present application, the first nozzle wiping device can clean the conical side of the nozzle, thereby improving the cleaning efficiency of the nozzle.

[0043] In some possible implementations, reference Figure 3 , Figure 3 This is another structural schematic diagram of the hot bed device provided in the embodiment of the present application. Figure 3 As shown, the heated bed device 204 is also provided with a power interface 2043, which can provide a source of heating energy for the heated bed device 204 to heat the heated bed device 204. The first nozzle wiping device 2041 and the power interface 2043 can be located on the same side of the heated bed device 204.

[0044] By implementing the embodiment of the present application, it can be achieved that only one side of the hot bed device 204 needs to be processed during production, thereby improving the production efficiency of the hot bed device 204 and making the layout reasonable and beautiful.

[0045] Exemplarily, the first nozzle wiping device 2041 can be pasted on the surface of the heated bed device 204, for example, specifically pasted near the top corner of the heated bed device 204. At this time, the first nozzle wiping device 2041 and the power interface 2043 are respectively located at the left and right top corners on the same side of the heated bed device 204.

[0046] Optionally, in some possible implementations, see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the first mouth wiping device provided in an embodiment of the present application. Figure 5 This is an exploded view of the first nozzle wiping device provided in the embodiment of the present application. Figure 4 and Figure 5 As shown, the first nozzle wiping device 2041 may include a first base 20411 and a first wiping block 20412. The first wiping block 20412 is connected to the first base 20411, and the first base 20411 is connected to the hot bed device 204. Exemplarily, the first base 20411 may be fixedly connected to the hot bed device by a connecting member such as a screw.

[0047] For example, the first wiping block 20412 may be made of silicone, and the first base 20411 may be a plastic base. In the process of wiping the residual consumables around the nozzle, the first wiping block 20412 is the part that plays a role, wherein the first base 20411 and the first wiping block 20412 are detachably connected, for example, by a buckle or other connection method, so that the first wiping block 20412 can be replaced.

[0048] In some possible implementations, see Figure 6 , Figure 6 This is a schematic diagram of the structure of the first wiping block provided in the embodiment of the present application. Figure 6As shown, the surface of the first wiping block 20412 facing the nozzle is provided with a plurality of protrusions. Among them, there are gaps between the plurality of protrusions. Exemplarily, when the 3D printer is ready to print, the nozzle is heated so that the nozzle extrude a portion of the consumables. After the consumables are extruded, the 3D printer can control the nozzle to move to the top of the first wiping block 20412 and rub back and forth in the gaps between the protrusions to wipe the residual consumables around the nozzle clean.

[0049] The embodiment of the present application discloses a hot bed device of a 3D printer, the 3D printer comprises a base, a nozzle, a guide rail and the hot bed device, wherein the hot bed device is arranged on the side of the base facing the nozzle, and the hot bed device is slidably connected to the base via the guide rail; the hot bed device is provided with a first nozzle wiping device, and the first nozzle wiping device is used to wipe the residual consumables around the nozzle when in contact with the nozzle. By implementing the embodiment of the present application, it is possible to avoid manually removing the residual consumables, and effectively reduce the risk of users being scalded when wiping the residual consumables from the nozzle.

[0050] In some possible implementations, reference Figure 7 , Figure 7 This is another structural schematic diagram of the hot bed device provided in the embodiment of the present application. Figure 7 As shown, the hot bed device 304 is provided with a first nozzle wiping device 3041 and a second nozzle wiping device 3042 .

[0051] Exemplary, combined Fig.11 and Fig.12 As shown, the heated bed device 304 may include a heated bed itself having a heating function.

[0052] In some feasible embodiments, the nozzle is in the shape of a cone, and the first nozzle wiping device 3041 is used to wipe the residual consumables on the conical side of the nozzle when in contact with the nozzle; the second nozzle wiping device 3042 is used to wipe the residual consumables on the conical tip of the nozzle when in contact with the nozzle. In this case, the functions of the first nozzle wiping device and the second nozzle wiping device may be different. The specific implementation of the first nozzle wiping device 3041 can be referred to in conjunction with the above. Figures 2 to 6 The described embodiments are not described in detail here.

[0053] Optionally, in some feasible implementations, the hot bed device 304 is also provided with a power interface 3043, wherein the first nozzle wiping device 3041, the second nozzle wiping device 3042 and the power interface 3043 are located on the same side of the hot bed device 304, and the second nozzle wiping device 3042 is arranged between the first nozzle wiping device 3041 and the power interface 3043, so that only one side of the hot bed device 304 needs to be processed during production, thereby improving the production efficiency of the hot bed device 304, and the layout is reasonable and beautiful. Furthermore, since the first nozzle wiping device 3041 and the second nozzle wiping device 3042 are arranged on the same side of the hot bed device 304, the distance between the first nozzle wiping device 3041 and the second nozzle wiping device 3042 is avoided to be large, and the nozzle can be wiped in multiple stages to improve the wiping efficiency.

[0054] Figure 7 Take the example that the second nozzle wiping device 3042 is disposed between the first nozzle wiping device 3041 and the power interface 3043. Optionally, the positions of the first nozzle wiping device 3041 and the second nozzle wiping device 3042 can be swapped.

[0055] In some feasible implementations, the first nozzle wiping device 3041 and the second nozzle wiping device 3042 can be made of different materials. For example, the material of the first nozzle wiping device 3041 can be a heat-resistant and structurally flexible material, and the material of the second nozzle wiping device 3042 can be a material with high heat conduction efficiency.

[0056] The nozzle may be provided with a heating module, and the controller of the 3D printer may pre-store a first position coordinate parameter for the first nozzle wiping device 3041 and a second position coordinate parameter for the second nozzle wiping device 3042. After the controller controls the heating module to heat the nozzle, the residual consumables around the nozzle soften. The controller moves the print head to move the nozzle to the first nozzle wiping device 3041. When the nozzle contacts the first nozzle wiping device 3041, the controller controls the print head to move back and forth at the first nozzle wiping device 3041, and the nozzle can rub back and forth on the first wiping block of the first nozzle wiping device 3041 to complete the wiping of the conical side portion of the nozzle, so as to prepare the 3D printer for printing.

[0057] Similarly, the controller can move the print head to move the nozzle to the second nozzle wiping device 3042. When the nozzle contacts the second nozzle wiping device 3042, the nozzle can abut against the second nozzle wiping device above the second nozzle wiping device 3042 to cool the nozzle and achieve cooling and solidification of the consumables remaining on the printer nozzle; the controller controls the print head to move back and forth at the second nozzle wiping device 3042, and the nozzle can rub back and forth above the second nozzle wiping device to wipe the residual consumables on the conical tip of the nozzle clean, so as to prepare for leveling the hot bed of the 3D printer.

[0058] Optionally, in some feasible implementation manners, the second nozzle wiping device 3042 and the first nozzle wiping device 3041 of the embodiment of the present application are only different in setting positions, and the functions of the first nozzle wiping device 3041 and the second nozzle wiping device 3042 can be the same.

[0059] In some possible implementations, reference Figure 8 and Fig. 9 , Figure 8 This is a schematic diagram of the structure of the second mouth wiping device provided in an embodiment of the present application. Fig. 9 This is an exploded view of the second nozzle wiping device provided in an embodiment of the present application. Figure 8 and Fig. 9 As shown, the second nozzle wiping device 3042 may include a second base 30421 and a second wiping block 30422. The second wiping block 30422 is connected to the second base 30421, and the second base 30421 is connected to the hot bed device 304. Exemplarily, the second base 30421 can be fixedly connected to the hot bed device 304 by a connecting member such as a screw.

[0060] Exemplarily, the second wiping block 30422 may be made of metal, for example, a stainless steel sheet, and the second base 30421 may be a plastic base. In the process of wiping the residual consumables around the nozzle, the second wiping block 30422 plays a role, wherein the second base 30421 and the second wiping block 30422 are detachably connected, and the second wiping block 30422 is a consumable and can be replaced.

[0061] Further, in some feasible implementations, reference Fig.10 , Fig.10 This is a schematic diagram of the structure of the second wiping block provided in the embodiment of the present application. Fig.10 As shown, the second wiping block 30422 is provided with a wiping area on the surface facing the nozzle, and the wiping area can be provided with a plurality of holes or a plurality of saw teeth. Exemplarily, after the nozzle has finished wiping the first nozzle wiping device, the 3D printer can control the nozzle to move to the top of the second wiping block 30422 and rub back and forth in the wiping area. Based on the specific heat capacity characteristics of metal, the consumables remaining in the nozzle can be effectively solidified. The plurality of holes or a plurality of saw teeth in the wiping area can wipe clean the consumables solidified at the tip of the nozzle, further improving the wiping efficiency of the second wiping block on the nozzle.

[0062] The embodiment of the present application adds a first nozzle wiping device and a second nozzle wiping device, wherein the first nozzle wiping device is used to wipe the residual consumables on the side of the nozzle, and the second nozzle wiping device is used to wipe the residual consumables at the tip of the nozzle contacting the hot bed. The first nozzle wiping device is used to clean the 3D printer, and the second nozzle wiping device is used to clean the 3D printer during the hot bed leveling stage. By implementing the embodiment of the present application, the residual consumables around the nozzle can be effectively removed.

[0063] Of course, the above examples are only examples. It should be noted that the number of the first nozzle wiping device and the second nozzle wiping device may not be unique, and those skilled in the art may set the first nozzle wiping device and the second nozzle wiping device in any number according to actual needs; further, the materials used to make the first nozzle wiping device and the second nozzle wiping device may be different or the same, and those skilled in the art may use any material to make the first nozzle wiping device or the second nozzle wiping device according to actual needs; further, controlling the contact between the printer nozzle and the nozzle wiping device based on preset position coordinate parameters is not the only way, and those skilled in the art may use other ways to control the contact between the printer nozzle and the nozzle wiping device, for example, configuring a camera for the printer nozzle to control the contact between the printer nozzle and the nozzle wiping device after determining the position of the nozzle wiping device. The above is not limited to the embodiments of the present application.

[0064] The embodiment of the present application configures a first nozzle wiping device and a second nozzle wiping device for the nozzle of the hot bed device of the 3D printer, thereby avoiding manual wiping of the printer nozzle and improving the safety of the 3D printer during operation. At the same time, targeted wiping of different positions of the nozzle can be performed in multiple stages, thereby improving the cleanliness of the printer nozzle during operation, thereby improving the dirt removal efficiency of the printer nozzle.

[0065] It should be noted that the above terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0066] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A hot bed device for a 3D printer, characterized in that: The hot bed device is arranged on a side of the base of the 3D printer facing the nozzle of the 3D printer, and the hot bed device is slidably connected to the base; wherein, The hot bed device is provided with a first wiping nozzle device, and the first wiping nozzle device comprises a first wiping block, and the first wiping block is a silica gel wiping block.

2. The hot bed device according to claim 1, characterized in that: The nozzle is in a conical shape.

3. The hot bed device according to claim 1, characterized in that: The heated bed device is also provided with a power interface, and the first nozzle wiping device and the power interface are located on the same side of the heated bed device.

4. The hot bed device according to claim 1, characterized in that: The shape of the nozzle is conical; The hot bed device is also provided with a second nozzle wiping device.

5. The hot bed device according to claim 1, characterized in that: The hot bed device is also provided with a power supply interface and a second nozzle wiping device; wherein, The first nozzle wiping device, the second nozzle wiping device and the power interface are located on the same side of the hot bed device.

6. The hot bed device according to claim 5, characterized in that: The second nozzle wiping device is arranged between the first nozzle wiping device and the power interface.

7. The hot bed device according to any one of claims 1 to 6, characterized in that: The first nozzle wiping device is adhered to the surface of the hot bed device.

8. The hot bed device according to claim 7, characterized in that: The first nozzle wiping device is adhered near the top corner of the hot bed device.

9. The hot bed device according to any one of claims 1 to 6, characterized in that: The first nozzle wiping device further comprises a first base, wherein the first wiping block is connected to the first base, and the first base is connected to the hot bed device.

10. The hot bed device according to any one of claims 1 to 6, characterized in that: A plurality of protrusions are arranged on a surface of the first wiping block facing the nozzle.

11. The hot bed device according to claim 10, characterized in that: There are gaps between the plurality of protrusions.

12. The hot bed device according to claim 4, characterized in that: The second nozzle wiping device includes a second base and a second wiping block; wherein the second wiping block is connected to the second base, and the second base is connected to the hot bed device.

13. The hot bed device according to claim 12, characterized in that: A surface of the second wiping block facing the nozzle is provided with a plurality of holes or a plurality of saw teeth.

14. The hot bed device according to claim 12, characterized in that: The second wiping block is a metal sheet.

15. A 3D printer, characterized in that: The 3D printer comprises a base, a nozzle and a heated bed device of the 3D printer according to any one of claims 1 to 14, wherein the heated bed device is arranged on a side of the base facing the nozzle, and the heated bed device is slidably connected to the base.

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