An air purification device for inside of 3D wax spraying machine

Abstract

The utility model discloses a kind of for 3D wax spraying machine internal air purification device, including wax dust collecting piece, venturi one, wax melting box and wax condensing box, wax dust collecting piece is communicated with 3D wax spraying machine inside, the inlet of venturi one is communicated with wax dust collecting piece, the side inlet of venturi one is connected with air pump, wax melting box is provided with an inlet and the outlet of venturi one is communicated, the outside wall of wax melting box is provided with heating sheet and heat insulation cotton, wax condensing box is located below wax melting box, wax condensing box is provided with an inlet and the outlet of wax melting box is communicated by liquid delivery pipeline.This application utilizes venturi one and air pump cooperation, effectively collect 3D wax spraying machine inside wax dust air, high-efficiency delivery wax dust air, so that the whole purification process is more smooth, wax dust air enters wax melting box and is heated and melted, after melting, wax liquid flows into lower wax condensing box and solidifies, realize high-efficiency purification 3D wax spraying machine internal air and recovery wax liquid, reduce the harm of wax dust to the health of production personnel.

Description

Technical Field

[0001] This utility model belongs to the field of air purification technology, specifically relating to an air purification device for the interior of a 3D wax spraying machine. Background Technology

[0002] 3D wax spraying machines are based on additive manufacturing technology. First, solid wax is heated and melted into liquid wax. Then, the liquid wax is precisely sprayed onto a construction platform through a nozzle following a pre-set 3D model path. Under the control of a software system, the nozzle sprays and accumulates wax point by point, line by line, and layer by layer. Each layer of wax solidifies rapidly after spraying, bonding with the next layer, and the layers are stacked to ultimately form a 3D wax model. It is mainly used in the field of lost-wax casting for precision and complex components, such as in the jewelry, aerospace, and medical industries.

[0003] However, heating solid wax to a molten state produces harmful gases or tiny wax particles suspended in the air. Simultaneously, during the printing process, the micron-sized wax particles generated when the printhead sprays wax are not entirely used for wax model printing; some remain suspended in the air or solidify and adhere to the working environment. The presence of these harmful gases or dust can adversely affect the health of production personnel. Furthermore, because the motion mechanism uses precision sensors for signal feedback, excessive wax dust adhering to related components can affect the normal operation of the equipment and increase maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and provide an air purification device for the inside of a 3D wax spraying machine. The device has a clever and reasonable structural design and is highly practical. By using a venturi tube in conjunction with an air pump, it effectively collects wax dust air inside the 3D wax spraying machine and efficiently transports the wax dust air, making the entire purification process smoother. After the wax dust air enters the wax melting box, it is heated and melted. The melted wax flows into the wax solidification box below and solidifies, thus achieving efficient purification of the air inside the 3D wax spraying machine and recovery of wax liquid, reducing the harm of wax dust to the health of production personnel.

[0005] An internal air purification device for a 3D wax spraying machine includes a wax dust collector, a venturi tube, a melting wax box, and a solidifying wax box. The wax dust collector is connected to the interior of the 3D wax spraying machine. The inlet of the venturi tube is connected to the wax dust collector via a gas delivery pipeline. The side inlet of the venturi tube is connected to an air pump via an air supply branch pipe. The air pump introduces air into the venturi tube. The melting wax box has an inlet A that is connected to the outlet of the venturi tube via a gas delivery pipeline. Heating elements and insulation cotton are arranged on the outer wall of the melting wax box from the inside out. The heating elements provide stable heat to the melting wax box, ensuring that the wax dust entering the melting wax box is kept at a suitable temperature. The wax melts rapidly into liquid wax at low temperatures. The insulation cotton provides excellent insulation, reducing heat loss and improving energy efficiency. The solidification box is located below the melting box. The solidification box has an inlet D port that connects to the outlet C port of the melting box via a liquid delivery pipeline. A solenoid valve is installed on the liquid delivery pipeline. The solenoid valve is a normally closed two-way solenoid valve. The design of the normally closed two-way solenoid valve ensures that the wax in the melting box only flows into the solidification box after reaching a certain liquid level. Compared to a design without a solenoid valve, this avoids the continuous and slow dripping of wax from the melting box into the solidification box, which would cause the solidification box to gradually form a pagoda-shaped solid and block the D port.

[0006] Furthermore, the wax dust collection component includes a manifold and a wax dust suction pipe. At least one wax dust suction pipe is connected to the manifold, which is connected to the interior of the 3D wax spraying machine. The manifold is connected to the inlet of the first venturi tube. One end of the wax dust suction pipe is connected to the manifold, and the other end is positioned around areas within the 3D wax spraying machine where dust is easily generated, such as around the nozzles. This allows for the intake of air carrying wax dust from the 3D wax spraying machine. The number of wax dust suction pipes is variable and can be expanded to multiple pipes according to actual needs, flexibly adjusting their quantity and layout. The manifold can combine the wax dust air drawn in by multiple suction pipes into a single path, which is then uniformly transported to the first venturi tube. This avoids the problems of complex piping and unstable airflow that may result from separate transport of multiple wax dust air paths, ensuring that the wax dust air enters the subsequent purification process in a relatively stable and concentrated state, thus improving the overall operating efficiency of the air purification device.

[0007] Furthermore, a flow regulating valve is installed on the manifold or the wax dust suction pipe. The flow regulating valve can be installed on the manifold or directly on the wax dust suction pipe, depending on the requirements. However, the number of flow regulating valves corresponds one-to-one with the number of wax dust suction pipes, so that each wax dust suction pipe corresponds to an independent flow regulating valve, thereby independently regulating the flow rate in each wax dust suction pipe.

[0008] Furthermore, it also includes a waste gas treatment device. Both the wax melting box and the wax solidification box are equipped with waste gas outlets, which are connected to the waste gas treatment device. The waste gas outlet B of the wax melting box is preferably located at the top of the wax melting box, and the waste gas outlet E of the wax solidification box is preferably located at the top of the wax solidification box. Both outlets B and E are connected to the waste gas treatment device to treat the waste gas inside the wax melting box and the wax solidification box before discharging it. The waste gas generated during the melting of wax dust and the processing of wax liquid may contain harmful substances such as alkanes and volatile ester gases. By specifically treating these waste gases with the waste gas treatment device, harmful components can be effectively removed, preventing these harmful substances from accumulating inside the equipment or spreading into the external environment, causing secondary pollution, protecting the health of production personnel and the safety of the surrounding environment, and further improving the working environment inside and outside the equipment.

[0009] Furthermore, the waste gas treatment device includes a drying cylinder and a purification cylinder. The inlet end of the drying cylinder is connected to the waste gas outlet through a waste gas discharge pipe, and the outlet end of the drying cylinder is connected to the inlet end of the purification cylinder through a waste gas discharge pipe. A desiccant is installed inside the drying cylinder, and a gas purification agent is installed inside the purification cylinder. The waste gas treatment process is divided into two stages: drying and purification. The waste gas first passes through the desiccant in the drying cylinder to remove moisture, thus preventing moisture from interfering with the subsequent purification process. Then, it passes through the gas purification agent in the purification cylinder for deep purification, removing harmful components such as alkanes and esters before being discharged. This improves the working environment of the equipment and avoids adverse effects of harmful gases and dust on the health of production personnel.

[0010] Furthermore, a second venturi tube is installed on the exhaust gas pipeline. The inlet of the second venturi tube is connected to the outlet of the purification cylinder. The side inlet of the second venturi tube is connected to the air pump through the second air supply branch pipe. The outlet of the second venturi tube is the gas exhaust port. The air pump is connected to both the first and second venturi tubes to provide power for the emission of wax dust air and exhaust gas. The air pump introduces a high-speed airflow into the second venturi tube to enhance the exhaust gas emission power, ensuring that the exhaust gas can be processed and discharged more smoothly and quickly, avoiding the accumulation of exhaust gas in the exhaust gas pipeline, and ensuring the stability of the exhaust gas treatment device operation.

[0011] Furthermore, both air supply branch pipe 1 and air supply branch pipe 2 are equipped with flow regulating valve 2. Air supply branch pipe 1 is responsible for providing airflow to Venturi tube 1 to transport wax dust air, and air supply branch pipe 2 provides airflow to Venturi tube 2 to enhance exhaust gas emission power. Flow regulating valve 2 is installed on both air supply branch pipes, so that the airflow on the two pipes can be adjusted and controlled independently.

[0012] Furthermore, the wax melting box is equipped with an S-shaped flow channel, a liquid level sensor, and a second temperature sensor. The S-shaped flow channel design allows the dust and air to flow along the path within the wax melting box, increasing the contact area and time with the inner wall of the box, thus ensuring the wax dust melts completely. The second temperature sensor can monitor the temperature inside the wax melting box in real time, working with the heating element to ensure that the temperature inside the box is high enough to fully melt the wax dust into liquid. The liquid level sensor can monitor the liquid level height of the wax in the wax melting box in real time. When the liquid level in the wax melting box triggers the liquid level sensor, the solenoid valve opens, allowing the wax in the wax melting box to flow into the solidification box by its own gravity.

[0013] Furthermore, the wax-free box is equipped with a weighing sensor and a temperature sensor. The weighing sensor detects the weight of the wax-free box, and when it reaches a certain weight, the weighing sensor will prompt the user to process the waste wax in the wax-free box to avoid problems that may be caused by the long-term accumulation of waste wax. The temperature sensor can detect the temperature inside the wax-free box in real time.

[0014] Furthermore, the wax-condensing box includes an outer cover and an inner box. The outer cover has a receiving cavity and a cooling cavity. The cooling cavity is located on both sides of the receiving cavity. The inner box is located inside the receiving cavity. The cooling cavity has a refrigeration device. The bottom of the receiving cavity has a weighing sensor.

[0015] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0016] This utility model features an ingenious and reasonable structural design with strong practicality. Utilizing a venturi tube and an air pump, it effectively collects wax dust from the air inside the 3D wax spraying machine, efficiently transporting the wax dust and making the entire purification process smoother. The wax dust enters the melting wax box and is heated and melted. The melted wax flows into the solidification wax box below to solidify, achieving efficient purification of the air inside the 3D wax spraying machine and recovering the wax liquid. This reduces the harm of wax dust to the health of production personnel. Furthermore, the exhaust gas treatment device purifies the exhaust gas in the melting and solidification wax boxes before discharge, further improving the working environment of the equipment and effectively preventing harmful gases and dust from adversely affecting the health of production personnel. During exhaust gas discharge, a second venturi tube, in conjunction with the air pump, enhances the exhaust gas discharge power, ensuring smoother and faster treatment and discharge of the exhaust gas, and guaranteeing the stability of the exhaust gas treatment device's operation. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a flowchart of an internal air purification device for a 3D wax spraying machine according to the present invention.

[0019] Figure 2This is a diagram showing the layout of the S-shaped flow channel inside the wax melting box in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the wax-condensing box in this utility model;

[0021] Figure 4 for Figure 3 A structural diagram from another perspective;

[0022] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the wax-condensing box in this utility model;

[0023] Figure 6 This is a schematic diagram of the inner box in the receiving cavity of this utility model.

[0024] Figure 7 This is a schematic diagram of the installation structure of the weighing sensor in this utility model.

[0025] In the diagram: 1-Wax dust collection unit; 2-Venturi tube 1; 3-Gas delivery pipeline; 4-Air supply branch pipe 1; 5-Air pump; 6-Wax melting box; 7-Heating element; 8-Insulation cotton; 9-Wax condensation box; 10-Liquid delivery pipeline; 11-Manifold; 12-Wax dust suction pipe; 13-Flow regulating valve 1; 14-Waste gas treatment device; 15-Drying cylinder; 16-Purification cylinder; 17-Waste gas emission pipeline; 18-Venturi tube Pipe 2; 19-Air supply branch pipe 2; 20-Flow control valve 2; 21-Weighing sensor; 22-Temperature sensor 1; 24-Liquid level sensor; 25-Temperature sensor 2; 26-Solenoid valve; 27-Gas exhaust port; 28-Outer casing; 29-Inner box; 30-Receiving cavity; 31-Cooling cavity; 32-Hinged door; 33-TEC cooling chip; 34-Heat sink assembly; 35-Fan; 36-Air outlet vent. Detailed Implementation

[0026] like Figures 1 to 7As shown, this utility model discloses an internal air purification device for a 3D wax spraying machine, comprising a wax dust collector 1, a Venturi tube 2, a melting wax box 6, and a solidifying wax box 9. The wax dust collector 1 is connected to the interior of the 3D wax spraying machine. The inlet of the Venturi tube 2 is connected to the wax dust collector 1 via a gas delivery pipe 3. The side inlet of the Venturi tube 2 is connected to an air pump 5 via an air supply branch pipe 4. The air pump 5 introduces and delivers air into the Venturi tube 2. The melting wax box 6 has an inlet A port connected to the outlet of the Venturi tube 2 via the gas delivery pipe 3. The outer wall of the melting wax box 6 is provided with heating elements 7 and heat insulation cotton 8 from the inside out. The heating elements 7 provide stable heat to the melting wax box 6, so that the wax dust entering the melting wax box 6 is purified. At a suitable temperature, the wax rapidly melts into liquid wax. Insulating cotton 8 provides excellent insulation, reducing heat loss and improving energy efficiency. The solidifying wax box 9 is located below the melting wax box 6. The solidifying wax box 9 has an inlet D port connected to the outlet C port of the melting wax box 6 via a liquid delivery pipe 10. A solenoid valve 26 is installed on the liquid delivery pipe 10. This solenoid valve 26 is a normally closed two-way solenoid valve. The design of the normally closed two-way solenoid valve 26 ensures that the wax in the melting wax box 6 only flows into the solidifying wax box 9 after reaching a certain liquid level. Compared to a design without the solenoid valve 26, this avoids the continuous and slow dripping of wax from the melting wax box 6 into the solidifying wax box 9, which would gradually form a pagoda-shaped solid inside the solidifying wax box 9, thus blocking the D port. As an optional implementation, the A port can be located at the top of the melting wax box 6, the C port at the bottom of the melting wax box 6, and the D port at the top of the solidifying wax box 9.

[0027] The wax dust collection component 1 includes a manifold 11 and a wax dust suction pipe 12. At least one wax dust suction pipe 12 is connected to the manifold 11. The wax dust suction pipe 12 communicates with the interior of the 3D wax spraying machine. The manifold 11 is connected to the inlet of the Venturi tube 2. One end of the wax dust suction pipe 12 is connected to the manifold 11, and the other end is located around areas within the 3D wax spraying machine where dust is easily generated, such as around the nozzles inside the 3D wax spraying machine. This is used to draw in air carrying wax dust from within the 3D wax spraying machine. The number of suction pipes 12 is variable and can be expanded to multiple according to actual needs. The number and layout of the wax dust suction pipes 12 can be flexibly adjusted. The manifold 11 can combine the wax dust air sucked in by multiple wax dust suction pipes 12 into one path and then uniformly deliver it to the Venturi tube 2. This avoids the problems of complex pipelines and unstable airflow that may be caused by the separate delivery of multiple wax dust air paths. It ensures that the wax dust air can enter the subsequent purification process in a relatively stable and concentrated state, thereby improving the operating efficiency of the entire air purification device.

[0028] A flow regulating valve 13 is provided on the manifold 11 or the wax dust suction pipe 12. The flow regulating valve 13 can be set on the manifold 11 or directly on the wax dust suction pipe 12, depending on the requirements. However, the number of flow regulating valves 13 corresponds one-to-one with the number of wax dust suction pipes 12, so that each wax dust suction pipe 12 corresponds to an independent flow regulating valve 13, thereby independently regulating the flow rate in each wax dust suction pipe 12.

[0029] The system also includes a waste gas treatment device 14. Both the wax melting box 6 and the wax solidification box 9 are equipped with waste gas outlets, which are connected to the waste gas treatment device 14. The waste gas outlet B of the wax melting box 6 is preferably located at the top of the wax melting box 6, and the waste gas outlet E of the wax solidification box 9 is preferably located at the top of the wax solidification box 9. Both outlets B and E are connected to the waste gas treatment device 14 to treat the waste gas inside the wax melting box 6 and the wax solidification box 9 before discharging it. The waste gas generated during the melting of wax dust and the processing of wax liquid may contain harmful substances such as alkanes and volatile ester gases. By specifically treating these waste gases with the waste gas treatment device 14, harmful components can be effectively removed, preventing these harmful substances from accumulating inside the equipment or spreading into the external environment, causing secondary pollution, protecting the health of production personnel and the safety of the surrounding environment, and further improving the working environment inside and outside the equipment.

[0030] The waste gas treatment device 14 includes a drying cylinder 15 and a purification cylinder 16. The air inlet of the drying cylinder 15 is connected to the waste gas outlet through the waste gas discharge pipe 17, and the air outlet of the drying cylinder 15 is connected to the air inlet of the purification cylinder 16 through the waste gas discharge pipe 17. A desiccant is installed inside the drying cylinder 15, and a gas purification agent is installed inside the purification cylinder 16. The waste gas treatment process is divided into two stages: drying and purification. The waste gas first passes through the desiccant in the drying cylinder 15 to remove moisture, so as to avoid moisture interfering with the subsequent purification process. Then, it passes through the gas purification agent in the purification cylinder 16 for deep purification, removing harmful components such as alkanes and esters before being discharged. This improves the working environment of the equipment and avoids the adverse effects of harmful gases and dust on the health of production personnel.

[0031] A second Venturi tube 18 is installed on the exhaust gas discharge pipe 17. The inlet of the second Venturi tube 18 is connected to the outlet of the purification cylinder 16. The side inlet of the second Venturi tube 18 is connected to the air pump 5 through the air supply branch pipe 19. The outlet of the second Venturi tube 18 is the gas discharge port. The air pump 5 is connected to both the first Venturi tube 2 and the second Venturi tube 18 to provide power for the emission of wax dust and exhaust gas. The air pump 5 introduces a high-speed airflow into the second Venturi tube 18 to enhance the exhaust gas emission power, ensuring that the exhaust gas can be processed and discharged more smoothly and quickly, avoiding the accumulation of exhaust gas in the exhaust gas discharge pipe 17, and ensuring the stability of the operation of the exhaust gas treatment device 14. The first Venturi tube 2 and the second Venturi tube 18 are devices designed based on the Venturi effect. The Venturi tubes in this application can be designed by oneself or mature modules on the market can be purchased directly, such as vacuum generators, which have the same principle as Venturi tubes and are both based on the Venturi effect. Taking the Chint CV-10 vacuum generator as an example, the vacuum generator's suction port is the inlet of the venturi tube, the vacuum generator's air inlet is the side inlet of the venturi tube, and the vacuum generator's exhaust port is the outlet of the venturi tube.

[0032] Both air supply branch pipe 14 and air supply branch pipe 29 are equipped with flow regulating valve 20. Air supply branch pipe 14 is responsible for providing airflow to Venturi tube 2 to transport wax dust air, and air supply branch pipe 29 provides airflow to Venturi tube 28 to enhance exhaust gas emission power. Both air supply branch pipes are equipped with flow regulating valve 20, so that the airflow on the two pipes can be adjusted and controlled independently.

[0033] Temperature sensor 22 is installed inside the wax collection box 9. Weighing sensor 21 is installed inside the wax collection box 9. Weighing sensor 21 detects the weight of the wax collection box 9. When a certain weight is reached, weighing sensor 21 will prompt to process the waste wax in the wax collection box 9 to avoid problems that may be caused by the long-term accumulation of waste wax. Temperature sensor 22 can detect the temperature inside the wax collection box 9 in real time.

[0034] This application designs the wax-freezing box 9 as an outer cover 28 and an inner box 29. The outer cover 28 is provided with a receiving cavity 30 and a cooling cavity 31. The inner box 29 is placed in the receiving cavity 30. A weighing sensor 21 is provided at the bottom of the receiving cavity 30. The top opening of the inner box 29 is used to receive the wax liquid in the melting wax box 6. Ports D and E are located at the top of the outer cover 28 and are connected to the receiving cavity 30 so that the wax liquid flows into the inner box 29 below through port D. In order to facilitate the treatment of the solidified waste wax in the inner box 29, this application sets one end face of the outer cover 28 as a hinged door 32. The hinged door 32 is directly opposite one end of the receiving cavity 30. By opening the hinged door 32, the inner box 29 in the receiving cavity 30 can be taken out to clean up the waste wax in time, improve the convenience of use and maintenance efficiency. The weighing sensor 21 at the bottom of the receiving cavity 30 is designed to monitor the weight of the inner box 29 in real time.

[0035] Cooling chambers 31 are preferably located on both sides of receiving chamber 30. Each cooling chamber 31 can be equipped with a set of refrigeration equipment, including TEC cooling chip 33, heat sink assembly 34 and fan 35. One side of TEC cooling chip 33 is attached to the side wall of cooling chamber 31 near receiving chamber 30, and the other side of TEC cooling chip 33 is in contact with heat sink assembly 34. Fan 35 is located at the bottom of cooling chamber 31 and blows air towards heat sink assembly 34. Air outlet vents 36 are provided on the side wall of cooling chamber 31 away from receiving chamber 30. The ingenious design of the TEC cooling plate 33, with its high cooling efficiency, combined with the heat sink assembly 34 and fan 35, forms a highly efficient cooling system. This system can quickly reduce the temperature inside the containment cavity 30, causing the molten wax to rapidly cool into a solid state. The heat sink assembly 34 increases the heat dissipation area, helping to dissipate heat quickly. The fan 35 blows air towards the heat sink assembly 34, accelerating airflow and further improving heat dissipation efficiency. The design of the exhaust vent 36 allows heat to be smoothly discharged from the cooling cavity 31, ensuring the continuous and efficient operation of the cooling equipment. This enables the molten wax in the inner box 29 to be cooled and solidified quickly and effectively.

[0036] The wax melting box 6 is equipped with an S-shaped flow channel (such as...). Figure 2 The S-shaped flow channel design (as indicated by the central arrow path) allows the dust-laden air to flow along the S-shaped path within the wax melting box 6, increasing the contact area and time with the inner wall of the wax melting box 6, thus ensuring the wax dust melts completely. The wax melting box 6 is equipped with a liquid level sensor 24 and a temperature sensor 25. The temperature sensor 25 monitors the temperature inside the wax melting box 6 in real time, working with the heating element 7 to ensure the temperature inside the wax melting box 6 is high enough to fully melt the wax dust into liquid. The liquid level sensor 24 monitors the liquid level height of the wax in the wax melting box 6 in real time. When the liquid level in the wax melting box 6 triggers the liquid level sensor 24, the solenoid valve 26 opens, allowing the wax in the wax melting box 6 to flow into the solidification box 9 by gravity.

[0037] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. An air purification device for the interior of a 3D wax spraying machine, characterized in that, include: A wax dust collection device, wherein the wax dust collection device is connected to the interior of the 3D wax spraying machine; Venturi tube one, the inlet of the Venturi tube one is connected to the wax dust collector through a gas delivery pipeline, and the side inlet of the Venturi tube one is connected to an air pump through an air supply branch pipe one. The air pump introduces air and delivers it into the Venturi tube one. The wax melting box has an inlet that is connected to the outlet of a venturi tube via a gas delivery pipeline. The outer wall of the wax melting box is provided with heating elements and heat insulation cotton from the inside to the outside. A wax-condensing box is located below the wax-melting box. The wax-condensing box has an inlet that is connected to the outlet of the wax-melting box via a liquid delivery pipeline. A solenoid valve is installed on the liquid delivery pipeline.

2. The air purification device for the interior of a 3D wax spraying machine according to claim 1, characterized in that: The wax dust collection device includes a manifold and a wax dust suction pipe. At least one wax dust suction pipe is connected to the manifold and the wax dust suction pipe is connected to the interior of the 3D wax spraying machine. The manifold is connected to the inlet of the Venturi tube.

3. The air purification device for the interior of a 3D wax spraying machine according to claim 2, characterized in that: A flow regulating valve is provided on the manifold or the wax dust suction pipe.

4. The air purification device for the interior of a 3D wax spraying machine according to claim 1, characterized in that: It also includes a waste gas treatment device, wherein both the wax melting box and the wax solidification box are provided with waste gas outlets, and the waste gas outlets are connected to the waste gas treatment device.

5. The air purification device for the interior of a 3D wax spraying machine according to claim 4, characterized in that: The waste gas treatment device includes a drying cylinder and a purification cylinder. The air inlet of the drying cylinder is connected to the waste gas outlet through a waste gas discharge pipe, and the air outlet of the drying cylinder is connected to the air inlet of the purification cylinder through the waste gas discharge pipe. A desiccant is provided inside the drying cylinder, and a gas purification agent is provided inside the purification cylinder.

6. The air purification device for the interior of a 3D wax spraying machine according to claim 5, characterized in that: A second venturi tube is installed on the exhaust gas pipeline. The inlet of the second venturi tube is connected to the outlet of the purification cylinder. The side inlet of the second venturi tube is connected to the air pump through a second air supply branch pipe. The outlet of the second venturi tube is the gas emission port.

7. The air purification device for the interior of a 3D wax spraying machine according to claim 6, characterized in that: Both the first and second air supply branch pipes are equipped with flow regulating valves.

8. The air purification device for the interior of a 3D wax spraying machine according to claim 1, characterized in that: The wax melting box is equipped with an S-shaped flow channel and a liquid level sensor and a temperature sensor.

9. The air purification device for the interior of a 3D wax spraying machine according to claim 1, characterized in that: The wax-condensing box is equipped with a temperature sensor and a weighing sensor.

10. The air purification device for the interior of a 3D wax spraying machine according to claim 9, characterized in that: The wax-condensing box includes an outer cover and an inner box. The outer cover has a receiving cavity and a cooling cavity. The cooling cavity is located on both sides of the receiving cavity. The inner box is located inside the receiving cavity. The cooling cavity is equipped with a refrigeration device. The weighing sensor is located at the bottom of the receiving cavity.

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