Wax liquid water bath conveying system for wax jet 3D printing and 3D printer thereof

Abstract

The utility model discloses a wax liquid water bath conveying system and 3D printer for spraying wax 3D printing, including water bath heating conveying component, wax material conveying component, detection component, water bath heating conveying component contains first water bath heating box, second water bath heating box, water bath circulating pipeline, water pump, and wax material conveying component contains solid wax melting box, liquid wax negative pressure control box, wax supply pump, and detection component contains first temperature sensor, second temperature sensor and third temperature sensor. This scheme can make the stable form and viscosity of wax in the melting and conveying process, and the temperature of each part can also be kept stable through the circulation mode, so as to avoid carbonization and nozzle blockage caused by local high temperature, thereby reducing frequent shutdown and nozzle replacement, reducing the downtime of 3D printer, and because the temperature can always keep stable, the viscosity stability of the wax liquid is better, thereby improving the 3D printing quality.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing technology, specifically relating to a wax liquid water bath delivery system for wax spray 3D printing and its 3D printer. Background Technology

[0002] Wax spraying 3D printing is an additive manufacturing technology based on the principle of fused deposition modeling. The printing process involves melting solid wax into a liquid state through a heating system, and then spraying it layer by layer through a precision nozzle to form the final shape.

[0003] Traditional wax spraying 3D printing uses direct heating via electric heating tubes to deliver wax. In developing this application, the applicant discovered that this method has at least the following problems:

[0004] 1. The heating element acts directly on the wax material. Due to uneven heat conduction, the temperature of the wax liquid on the inner wall of the pipe or near the nozzle is easily far above the melting point. The local high temperature causes the wax material to thermally decompose and generate carbonized particles. These particles can clog the micropores of the nozzle, resulting in printing interruption or defects on the surface of the model. Moreover, the wax material is heated by the heating element for a long time, which may even pose a safety hazard of spontaneous combustion.

[0005] 2. Due to localized overheating and carbonization of the wax, the replacement and maintenance cycle of the nozzles becomes more frequent, requiring the shutdown of the entire wax delivery system. This is not only costly in terms of replacement and maintenance, but also cumbersome in terms of operation and long downtime, thus affecting production.

[0006] 3. Another method uses a combination of electric heating tubes and other heating methods. This method results in large temperature fluctuations in the wax liquid during transportation. Since wax is mostly an organic compound, it is sensitive to temperature changes. When the temperature is unstable, it will also affect the viscosity stability of the wax liquid, thus causing the printing quality to deteriorate when performing wax spray 3D printing.

[0007] In view of this, the problem that the existing wax heating method in wax spraying 3D printing can cause local high temperature, which can easily lead to wax carbonization, wax can easily clog the nozzle, resulting in frequent nozzle replacement, and unstable temperature control can lead to poor printing quality has become the research topic to be solved by this utility model. Utility Model Content

[0008] The purpose of this invention is to provide a wax liquid water bath delivery system for wax spraying 3D printing and a 3D printer thereof.

[0009] To achieve the above objectives, the first aspect of this utility model proposes a wax liquid water bath delivery system for wax spraying 3D printing, the wax liquid water bath delivery system comprising a water bath heating and delivery component, a wax material delivery component, and a detection component.

[0010] A water bath heating and conveying assembly includes a first water bath heating tank, a second water bath heating tank, a water bath circulation pipe, and a water pump. The water bath circulation pipe is located between the first water bath heating tank and the second water bath heating tank, and the water pump is located on the water bath circulation pipe.

[0011] The wax delivery assembly includes a solid wax melting tank, a liquid wax negative pressure control box, a wax supply pump, a wax supply pipe located between the solid wax melting tank and the liquid wax negative pressure control box, and a wax outlet pipe located below the liquid wax negative pressure control box. The end of the wax outlet pipe is detachably connected to a nozzle, and the wax supply pump is located on the wax supply pipe. The solid wax melting tank is located on the first water bath heating tank, the liquid wax negative pressure control box is located on the second water bath heating tank, and the wax supply pipe and the wax outlet pipe are located on the water bath circulation pipe.

[0012] The detection component includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is disposed in a first water bath heating chamber, the second temperature sensor is disposed in a second water bath heating chamber, and the third temperature sensor is disposed on the water bath circulation pipe at the position corresponding to the wax outlet pipe.

[0013] The second aspect of this utility model provides a 3D printer having a wax liquid water bath delivery system as described in the first aspect of this utility model, wherein a nozzle is provided at the common end of the water bath circulation pipe and the wax outlet pipe.

[0014] The relevant contents of this utility model are explained as follows:

[0015] 1. In the above-mentioned technical solution of this utility model, in order to address the problems of local high temperature causing wax carbonization, wax clogging of the nozzle leading to frequent nozzle replacement, and unstable temperature control resulting in poor print quality in existing wax spraying 3D printing methods, an innovative wax liquid water bath delivery system and its 3D printer for wax spraying 3D printing are designed. This wax liquid water bath delivery system for wax spraying 3D printing includes a water bath heating and delivery component, a wax delivery component, and a detection component. The solid wax melting tank, liquid wax negative pressure control box, wax supply pipe, and wax outlet pipe in the wax delivery component are respectively installed on the first water bath heating tank, the second water bath heating tank, and the water bath circulation pipe of the water bath heating and delivery component. The various components in the water bath heating and delivery component control the wax liquid in the wax delivery component. The components are heated in a water bath. First, the first water bath heating tank heats the solid wax melting tank located within it. After the water in the first water bath heating tank is heated to the set temperature, the water pump is turned on to circulate the hot water to the entire water bath heating and delivery assembly. The heating and circulation steps are repeated until the temperatures of the wax outlet pipe (nozzle accessory), the first water bath heating tank, and the second temperature sensor all reach the set temperature. This method can keep the wax in a stable form and viscosity during melting and delivery. The circulation method can also keep the temperature of each part stable, thereby avoiding carbonization and nozzle clogging caused by local high temperature. This reduces the frequency of nozzle replacement and the downtime of the 3D printer. Furthermore, because the temperature can always be kept stable, the viscosity stability of the wax liquid is better, thereby improving the 3D printing quality.

[0016] 2. In the above technical solution, the water bath circulation pipeline includes an outlet pipe and a return pipe located between the first water bath heating box and the second water bath heating box. The first water bath heating box, the outlet pipe, the second water bath heating box, and the return pipe form a circulating water bath heating pipeline. The water pump is located on the outlet pipe or the return pipe. This design makes the hot water circulation method of the water bath circulation pipeline more reasonable, thereby ensuring the stability of the water bath temperature in the entire water bath heating and delivery assembly, and thus ensuring the stability of the wax liquid temperature.

[0017] 3. In the above technical solution, both the wax supply pipe and the wax outlet pipe are located on the water outlet pipe. The water outlet pipe is equipped with a T-junction at its end. The first end of the T-junction is connected to the water outlet pipe, the second end is connected to the return water pipe, and the third end is coaxially connected to the wax outlet pipe and then connected to the nozzle. This T-junction design not only ensures the orderly circulation of hot water, but also ensures good water bath heating and circulation at the nozzle by connecting the third end to the wax outlet pipe and then to the nozzle. This ensures that the wax material maintains a stable temperature, stable shape, and stable viscosity throughout the entire wax printing process.

[0018] 4. In the above technical solution, a shut-off valve is provided at the third end of the three-way pipe. This shut-off valve is designed to facilitate the replacement and maintenance of the nozzle. When the nozzle needs to be replaced, the water bath heating shut-off valve can be closed, thereby shutting off the water in the part connected to the nozzle. The liquid wax will not flow out due to the negative pressure, thus facilitating the replacement of the nozzle and further reducing the replacement time and improving production efficiency.

[0019] 5. In the above technical solution, the detection component further includes a liquid level sensor installed on the first water bath heating box for monitoring the liquid level in the first water bath heating box. When the water level in the first water bath heating box is lower than the height required by the liquid level sensor, the liquid level sensor alarms and stops the wax supply pump to prevent the wax from solidifying and clogging the pipe.

[0020] 6. In the above technical solution, the first water bath heating tank and the second water bath heating tank are set at the same level. This design ensures that the liquid level in the first water bath heating tank and the second water bath heating tank is balanced, making the hot water circulation more reasonable.

[0021] 7. In the above technical solution, the liquid level in the first water bath heating box is higher than the height of the solid wax melting box; the liquid level in the second water bath heating box is higher than the height of the liquid wax negative pressure control box; and the liquid level in the water bath circulation pipe is higher than the height of the wax supply pipe and the wax outlet pipe. This design ensures that the solid wax melting box, liquid wax negative pressure control box, wax supply pipe, and wax outlet pipe in the wax conveying assembly are fully covered by the liquid level in the water bath heating conveying assembly, guaranteeing good heating effect, avoiding local temperature unevenness, and making the heating temperature more stable.

[0022] 8. In this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] 9. In this utility model, the terms "center", "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional assembly relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] 10. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] Due to the application of the above solution, this utility model has the following advantages and effects compared with the prior art:

[0026] The present invention addresses the problems of localized high temperatures in existing wax-spraying 3D printing methods, which can easily lead to wax carbonization, nozzle clogging and frequent nozzle replacements, and unstable temperature control resulting in poor print quality. It innovatively designs a wax liquid water bath delivery system and a 3D printer for wax-spraying 3D printing. This wax liquid water bath delivery system includes a water bath heating and delivery component, a wax delivery component, and a detection component. The solid wax melting tank, liquid wax negative pressure control box, wax supply pipe, and wax outlet pipe in the wax delivery component are respectively installed on the first water bath heating tank, the second water bath heating tank, and the water bath circulation pipe of the water bath heating and delivery component. The components in the water bath heating and delivery component control the components in the wax delivery component. Water bath heating is performed, in which the first water bath heating tank first heats the solid wax melting tank located within it. After the water in the first water bath heating tank is heated to the set temperature, the water pump is turned on to circulate the hot water to the entire water bath heating and delivery assembly. The heating and circulation steps are repeated until the temperatures of the wax outlet pipe (nozzle accessory), the first water bath heating tank, and the second temperature sensor all reach the set temperature. This method can keep the wax in a stable form and viscosity during melting and delivery. The circulation method can also keep the temperature of each part stable, thereby avoiding carbonization and nozzle clogging caused by local high temperature, thus reducing frequent shutdowns to replace nozzles, reducing the downtime of the 3D printer, and because the temperature can always be kept stable, the viscosity stability of the wax liquid is better, thereby improving the 3D printing quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the system principle in an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the system structure in an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the water bath heating and conveying assembly in an embodiment of this utility model.

[0030] The parts shown in the above attached diagram are illustrated below:

[0031] 1. Water bath heating and conveying assembly;

[0032] 11. First water bath heating tank; 111. Water inlet; 12. Second water bath heating tank; 13. Water bath circulation pipe; 131. Water outlet pipe; 132. Water return pipe; 133. T-joint; 134. Flow control valve; 14. Water pump;

[0033] 2. Wax delivery assembly;

[0034] 21. Solid wax melting box; 22. Liquid wax negative pressure control box; 23. Wax supply pump; 24. Wax supply pipeline; 25. Wax outlet pipeline;

[0035] 3. Detection components;

[0036] 31. First temperature sensor; 32. Second temperature sensor; 33. Third temperature sensor; 34. Liquid level sensor;

[0037] 4. Spray nozzle. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] Example 1, as Figures 1 to 3 As shown in Embodiment 1 of this utility model, a wax liquid water bath conveying system for wax spraying 3D printing is proposed. The wax liquid water bath conveying system includes a water bath heating and conveying component 1, a wax material conveying component 2, and a detection component 3.

[0040] The water bath heating and conveying assembly 1 includes a first water bath heating box 11, a second water bath heating box 12, a water bath circulation pipe 13, and a water pump 14. The water bath circulation pipe 13 is located between the first water bath heating box 11 and the second water bath heating box 12, and the water pump 14 is located on the water bath circulation pipe 13.

[0041] The wax delivery assembly 2 includes a solid wax melting tank 21, a liquid wax negative pressure control box 22, a wax supply pump 23, a wax supply pipe 24 located between the solid wax melting tank 21 and the liquid wax negative pressure control box 22, and a wax outlet pipe 25 located below the liquid wax negative pressure control box 22. The end of the wax outlet pipe 25 is detachably connected to the nozzle 4. The wax supply pump 23 is located on the wax supply pipe 24. The solid wax melting tank 21 is located on the first water bath heating box 11, the liquid wax negative pressure control box 22 is located on the second water bath heating box 12, and the wax supply pipe 24 and the wax outlet pipe 25 are located on the water bath circulation pipe 13.

[0042] The detection component 3 includes a first temperature sensor 31, a second temperature sensor 32, and a third temperature sensor 33. The first temperature sensor 31 is correspondingly installed in the first water bath heating box 11, the second temperature sensor 32 is correspondingly installed in the second water bath heating box 12, and the third temperature sensor 33 is installed on the water bath circulation pipe 13 at the position corresponding to the wax outlet pipe 25.

[0043] The workflow of Embodiment 1 of this utility model can be referred to as follows:

[0044] 1. First, the solid wax melting box 21 located within the first water bath heating box 11 is heated.

[0045] 2. After the water in the first water bath heating tank 11 is heated to the set temperature, the water pump 14 is turned on to circulate the hot water to the entire water bath heating and conveying assembly 1;

[0046] 3. Repeat the heating and circulation steps until the temperatures of the wax outlet pipe 25 (sprayer 4 accessory), the first water bath heating box 11, and the second temperature sensor 32 all reach the set temperature;

[0047] 4. When the temperature of the wax outlet pipe 25 (nipple 4 accessory), the first water bath heating box 11, and the second temperature sensor 32 is lower than the set temperature, restart the heating of the first water bath heating box 11 and the circulation of the water pump 14.

[0048] In the implementation of Embodiment 1 of this utility model, the solid wax melting tank 21, liquid wax negative pressure control box 22, wax supply pipe 24, and wax outlet pipe 25 in the wax material conveying assembly 2 are respectively installed on the first water bath heating box 11, the second water bath heating box 12, and the water bath circulation pipe 13 of the water bath heating conveying assembly 1. Each component in the water bath heating conveying assembly 1 heats each component in the wax material conveying assembly 2 in a water bath. This allows the wax to maintain a stable form and viscosity during melting and conveying. The circulation method also keeps the temperature of each part stable, thereby avoiding carbonization and nozzle clogging caused by localized high temperatures. This reduces frequent shutdowns for nozzle 4 replacement, decreasing the downtime of the 3D printer. Furthermore, because the temperature remains consistently stable, the viscosity stability of the wax liquid is improved, thus enhancing the 3D printing quality.

[0049] In the first embodiment of this utility model, the water bath circulation pipe 13 includes an outlet pipe 131 and a return pipe 132 disposed between the first water bath heating box 11 and the second water bath heating box 12. The first water bath heating box 11, the outlet pipe 131, the second water bath heating box 12, and the return pipe 132 form a circulating water bath heating pipe. The water pump 14 is disposed on the outlet pipe 131 or the return pipe 132. This design makes the hot water circulation method of the water bath circulation pipe 13 more reasonable, thereby ensuring the stability of the water bath temperature in the entire water bath heating and conveying assembly 1, and thus ensuring the stability of the wax liquid temperature.

[0050] In the first embodiment of this utility model, the wax supply pipe 24 and the wax outlet pipe 25 are both located on the water outlet pipe 131. The water outlet pipe 131 is provided with a three-way pipe 133 at its end. The first end of the three-way pipe 133 is connected to the water outlet pipe 131, the second end is connected to the return water pipe 132, and the third end is coaxially connected to the wax outlet pipe 25 and then connected to the nozzle 4. With this three-way pipe 133 design, in addition to satisfying the orderly circulation of hot water, it also ensures that the nozzle 4 is also subjected to good water bath heating circulation through its third end coaxially connected to the wax outlet pipe 25 and then connected to the nozzle 4, so as to ensure that the wax material maintains a stable temperature, stable shape and viscosity throughout the entire wax printing process.

[0051] In the first embodiment of this utility model, a shut-off valve 134 is provided at the third end of the three-way pipe 133. The shut-off valve 134 is designed to facilitate the replacement and maintenance of the nozzle 4. When the nozzle 4 needs to be replaced, the water bath heating shut-off valve 134 can be closed, thereby only closing the water in the part connected to the nozzle 4. The liquid wax will not flow out due to the negative pressure, thus facilitating the replacement of the nozzle 4 and further reducing the operation time for replacing the nozzle 4, thereby improving production efficiency.

[0052] In the first embodiment of this utility model, the detection component 3 further includes a liquid level sensor 34 installed on the first water bath heating box 11 for monitoring the liquid level in the first water bath heating box 11. When the water level in the first water bath heating box 11 is lower than the height required by the liquid level sensor 34, the liquid level sensor 34 alarms and stops the wax supply pump 23 to prevent the wax from solidifying and clogging the pipe.

[0053] In the first embodiment of this utility model, the first water bath heating tank 11 and the second water bath heating tank 12 are arranged flush with each other. This design ensures that the liquid levels in the first water bath heating tank 11 and the second water bath heating tank 12 are balanced, making the hot water circulation more reasonable.

[0054] In the first embodiment of this utility model, the liquid level in the first water bath heating box 11 is higher than the height of the solid wax melting box 21; the liquid level in the second water bath heating box 12 is higher than the height of the liquid wax negative pressure control box 22; and the liquid level in the water bath circulation pipe 13 is higher than the height of the wax supply pipe 24 and the wax outlet pipe 25. This design ensures that the solid wax melting box 21, the liquid wax negative pressure control box 22, the wax supply pipe 24, and the wax outlet pipe 25 in the wax material conveying assembly 2 are fully covered by the liquid level in the water bath heating and conveying assembly 1, guaranteeing good heating effect, avoiding local temperature unevenness, and making the heating temperature more stable.

[0055] Example 2: This utility model proposes a 3D printer, which has a wax liquid water bath delivery system as described in Example 1 of this utility model, wherein a nozzle 4 is provided at the common end of the water bath circulation pipe 13 and the wax outlet pipe.

[0056] Through the implementation of Embodiment 2 of this utility model, the wax in the 3D printer can maintain a stable form and viscosity during melting and transportation. The temperature of each part can also be kept stable through circulation, thereby avoiding carbonization and clogging of the nozzle 4 caused by local high temperature. This reduces the frequency of machine stoppages to replace the nozzle 4, thus reducing the downtime of the 3D printer. Furthermore, since the temperature can always be kept stable, the viscosity stability of the wax liquid is better, thereby improving the 3D printing quality.

[0057] The technical solution of this utility model will now be described in more detail with a more specific embodiment.

[0058] In this detailed embodiment, a 3D printer with a wax liquid water bath delivery system for wax spraying 3D printing is proposed. The 3D printer includes a water bath heating delivery assembly 1, a wax delivery assembly 2, a detection assembly 3, and a nozzle 4.

[0059] A water bath heating and conveying assembly 1 includes a first water bath heating tank 11, a second water bath heating tank 12, a water bath circulation pipe 13, and a water pump 14. The water bath circulation pipe 13 includes an outlet pipe 131 and a return pipe 132 located between the first water bath heating tank 11 and the second water bath heating tank 12. The first water bath heating tank 11, the outlet pipe 131, the second water bath heating tank 12, and the return pipe 132 form a circulating water bath heating pipe. The water pump 14 is located on the outlet pipe 131 or the return pipe 132. The first water bath heating tank 11 and the second water bath heating tank 12 are flush.

[0060] The wax delivery assembly 2 includes a solid wax melting tank 21, a liquid wax negative pressure control box 22, a wax supply pump 23, a wax supply pipe 24 located between the solid wax melting tank 21 and the liquid wax negative pressure control box 22, and a wax outlet pipe 25 located below the liquid wax negative pressure control box 22. The end of the wax outlet pipe 25 is detachably connected to the nozzle 4. The wax supply pump 23 is located on the wax supply pipe 24. The solid wax melting tank 21 is located on the first water bath heating box 11, and the liquid wax negative pressure control box 22 is located on the second water bath heating box 12. The wax supply pipe 24 and the wax outlet pipe 25 are both located on the water outlet pipe 131. The water outlet pipe 131 has a T-junction 133 at its end. The first end of the T-junction 133 is connected to the water outlet pipe 131, the second end is connected to the return water pipe 132, and the third end is coaxially connected to the wax outlet pipe 25 and then connected to the nozzle 4. A flow-stop valve 134 is provided at the third end of the three-way pipe 133. The liquid level in the first water bath heating box 11 is higher than the height of the solid wax melting box 21; the liquid level in the second water bath heating box 12 is higher than the height of the liquid wax negative pressure control box 22; and the liquid level in the water bath circulation pipe 13 is higher than the height of the wax supply pipe 24 and the wax outlet pipe 25.

[0061] The detection component 3 includes a first temperature sensor 31, a second temperature sensor 32, a third temperature sensor 33, and a liquid level sensor 34. The first temperature sensor 31 is disposed in the first water bath heating box 11, the second temperature sensor 32 is disposed in the second water bath heating box 12, the third temperature sensor 33 is disposed on the water bath circulation pipe 13 at the position corresponding to the wax outlet pipe 25, and the liquid level sensor 34 is disposed on the first water bath heating box 11.

[0062] The working process of this detailed embodiment is as follows:

[0063] 1. Place the solid wax into the solid wax melting box.

[0064] 2. Set the target heating temperature, heat the water in the first water bath heating tank 11 to the set temperature, and maintain it.

[0065] 3. When the first temperature sensor 31 detects that the first water bath heating box 11 has reached the set temperature, the water pump 14 circulates once.

[0066] 4. Repeat the heating and circulation steps until the pipe connecting the nozzle 4, the second water bath heating box 12, and the first water bath heating box 11 all reach the set temperature.

[0067] 5. Once the water reaches the required temperature, wait for a period of time to melt the wax. When the liquid wax negative pressure control box 22 sends a wax shortage signal, the wax supply pump 23 will operate to supply wax to the liquid wax negative pressure control box 22. If the liquid wax negative pressure control box 22 is still low on wax after a certain period of time, the wax supply pump 23 will stop operating and an alarm will be sounded, reminding users to add solid wax.

[0068] 6. When any temperature reading is 0.5 degrees Celsius lower than the set temperature, the system will automatically heat and circulate.

[0069] 7. When the water level is lower than the height required by the level sensor 34, the level sensor 34 will alarm and stop the wax supply pump 23 to prevent the wax from solidifying and clogging the pipes; at the same time, pure water will be added from the water inlet 111 of the first water bath heating tank 11 to keep the water level at the corresponding height.

[0070] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wax liquid water bath delivery system for wax spraying 3D printing, characterized in that: The wax liquid water bath delivery system includes: A water bath heating and conveying assembly (1) includes a first water bath heating tank (11), a second water bath heating tank (12), a water bath circulation pipe (13), and a water pump (14). The water bath circulation pipe (13) is located between the first water bath heating tank (11) and the second water bath heating tank (12), and the water pump (14) is located on the water bath circulation pipe (13). The wax delivery assembly (2) includes a solid wax melting tank (21), a liquid wax negative pressure control box (22), a wax supply pump (23), a wax supply pipe (24) located between the solid wax melting tank (21) and the liquid wax negative pressure control box (22), and a wax outlet pipe (25) located below the liquid wax negative pressure control box (22). The end of the wax outlet pipe (25) is detachably connected to the nozzle (4). The wax supply pump (23) is located on the wax supply pipe (24). The solid wax melting tank (21) is located on the first water bath heating box (11), the liquid wax negative pressure control box (22) is located on the second water bath heating box (12), and the wax supply pipe (24) and the wax outlet pipe (25) are located on the water bath circulation pipe (13). The detection component (3) includes a first temperature sensor (31), a second temperature sensor (32) and a third temperature sensor (33). The first temperature sensor (31) is disposed in the first water bath heating box (11), the second temperature sensor (32) is disposed in the second water bath heating box (12), and the third temperature sensor (33) is disposed on the water bath circulation pipe (13) at the position corresponding to the wax outlet pipe (25).

2. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 1, characterized in that: The water bath circulation pipe (13) includes an outlet pipe (131) and a return pipe (132) located between the first water bath heating tank (11) and the second water bath heating tank (12). The first water bath heating tank (11), the outlet pipe (131), the second water bath heating tank (12), and the return pipe (132) form a circulating water bath heating pipe. The water pump (14) is located on the outlet pipe (131) or the return pipe (132).

3. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 2, characterized in that: The wax supply pipe (24) and the wax outlet pipe (25) are both located on the water outlet pipe (131). The water outlet pipe (131) has a three-way pipe (133) at its end. The first end of the three-way pipe (133) is connected to the water outlet pipe (131), the second end is connected to the return water pipe (132), and the third end is coaxially connected to the wax outlet pipe (25) and then connected to the nozzle (4).

4. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 3, characterized in that: A shut-off valve (134) is provided at the third end of the three-way pipe (133).

5. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 1, characterized in that: The detection component (3) further includes a liquid level sensor (34) disposed on the first water bath heating tank (11) for monitoring the liquid level in the first water bath heating tank (11).

6. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 1, characterized in that: The first water bath heating box (11) and the second water bath heating box (12) are set at the same level.

7. The wax liquid water bath delivery system for wax spraying 3D printing according to claim 5, characterized in that: The liquid level in the first water bath heating box (11) is higher than the height of the solid wax melting box (21); the liquid level in the second water bath heating box (12) is higher than the height of the liquid wax negative pressure control box (22); the liquid level in the water bath circulation pipe (13) is higher than the height of the wax supply pipe (24) and the wax outlet pipe (25).

8. A 3D printer, characterized in that: The 3D printer has a wax liquid water bath delivery system as described in any one of claims 1 to 7, wherein a nozzle (4) is provided at the common end of the water bath circulation pipe (13) and the wax outlet pipe.

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