Air circulation device for wax pattern printing

Abstract

The invention relates to the technical field of 3D printing, in particular to an air circulation device for wax pattern printing, which comprises a first acquisition module for acquiring the temperature value of the device at the current moment; the second acquisition module is used for acquiring the change rule of the temperature according to the temperature values of the n + 1 continuous moments; the temperature adjusting module changes the temperature of the space in the device; the speed changing module changes the wind speed of the space in the device; the control module is used for controlling the temperature of the temperature controller and the rotating speed of the fan assembly according to the change rule of the temperature; the first acquisition module comprises an operation area temperature identification unit which is used for counting the temperature value of the operation area at the current moment; the second acquisition module comprises an acquisition unit and a calculation unit, the calculation unit calculates curve fitting information of the operation area, and the acquisition unit acquires a temperature change curve and a temperature change rate corresponding to the operation area; and the control module comprises a control unit for judging whether to trigger and start the temperature adjusting module and the speed changing module. The forming quality of the product can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to an air circulation device for wax pattern printing. Background Technology

[0002] The 3D printer's system is pre-configured with parameters needed for 3D printing. These parameters are stored in a storage device or on the computer. The printer's control system retrieves the 3D model data from the storage device or computer, performs analysis, slices the model, plans the path between slices, and establishes appropriate support structures. Finally, the central control system automatically generates the control commands required by the 3D printer according to the software settings. The stepper motor drivers on the control board receive commands and drive the corresponding stepper motors to move the print head. The print head begins to eject filaments, creating 2D layers according to the principle of point movement forming lines and line movement forming surfaces, building the model layer by layer. The amount of movement along the z-axis is a pre-set distance, also called the layer height. After the model is printed, subsequent finishing processes such as sanding, polishing, or painting are required.

[0003] 3D printers operate at high temperatures during printing, and the printed products need to be cooled promptly to solidify their shape for the next printing stage. Different shapes and materials have different cooling requirements, especially when using a 3D printer for wax model printing. If the cooling temperature is too low, it will affect the material's forming quality; if the temperature is too high, it will affect the forming speed. Summary of the Invention

[0004] In order to maintain the operating temperature of the device at a certain level and reduce the occurrence of the device operating at excessively high temperatures, this application provides an air circulation device for wax pattern printing, which can ensure the molding quality of the product.

[0005] This application provides an air circulation device for wax pattern printing, which adopts the following technical solution: An air circulation device for wax pattern printing includes a first acquisition module for acquiring the temperature value of the device at the current moment. The second acquisition module is used to acquire the temperature change pattern based on the temperature values ​​at n+1 consecutive time points; Temperature control module, including a thermostat assembly, for changing the temperature of the space inside the device; Speed-changing module, including fan assembly, for changing the airflow speed within the device; The control module is used to control the temperature of the thermostat and the speed of the fan assembly according to the temperature change pattern; The first acquisition module includes at least a work area temperature identification unit for statistically analyzing the temperature value of the work area at the current moment. The second acquisition module includes an acquisition unit and a calculation unit. The calculation unit performs curve fitting on the temperature values ​​of the work area for n+1 consecutive moments to obtain work area curve fitting information. The n+1 consecutive moments include the previous n historical moments and the current moment. The acquisition unit obtains the temperature change curve and temperature change rate corresponding to the work area based on the work area curve fitting information. The control module includes a control unit that pre-calculates a temperature change threshold based on the temperature change rate and determines whether to trigger the activation of the temperature adjustment module and the speed change module.

[0006] By adopting the above technical solution, in scenarios where wax pattern printing is sensitive to temperature, the first and second acquisition modules work together to provide various parameters to the control module. These parameters are then used as the basis to trigger the activation of the temperature control module and the speed control module, achieving dual-variable optimization of temperature and airflow. During operation, especially in the work area, during wax pattern printing, this application uses curve fitting of temperature data at time n+1. The continuous updating of curve fitting information constitutes a dynamic database, which can dynamically predict temperature changes, shorten the response time of each module, and improve the production flexibility and sensitivity of the device. Compared with the prior art, this application can change the temperature inside the device through the temperature control module and change the airflow speed inside the device through the speed control module, thereby maintaining the working temperature inside the device at a certain level, reducing the occurrence of the device operating at overheating temperatures, meeting the different cooling requirements of printed parts of different shapes and materials, and ensuring the molding quality of the product.

[0007] Preferably, during the process of the control module controlling the temperature of the thermostat component and the speed of the fan component, the trend of the simulated curve is calculated based on the temperature change rate, the temperature change value within the same time period is calculated, the temperature value at time n+1 is obtained, and it is compared with the originally set temperature range value to determine whether the device is working in an over-temperature scenario. If so, the temperature adjustment module and the speed modification module are triggered to start. The temperature adjustment module changes the temperature of the space inside the device, and the speed modification module changes the wind speed of the space inside the device.

[0008] By adopting the above technical solution, the trend of the simulated curve is pre-calculated based on the temperature change rate to realize scenario simulation, thereby calculating the temperature value. Then, by comparing it with the originally set temperature range value, it is determined whether the device is working in an over-temperature scenario. If so, the temperature adjustment module and the speed modification module are triggered. The temperature adjustment module changes the temperature of the space inside the device, and the speed modification module changes the air speed inside the device. This mechanism of pre-controlling temperature and airflow can better meet the different cooling requirements of printed parts of different shapes and materials, and ensure the molding quality of the product.

[0009] Preferably, the first acquisition module further includes an air inlet zone temperature identification unit, used to statistically analyze the temperature value of the air inlet zone at the current moment; the calculation unit of the second acquisition module learns the preceding logic and performs synchronous calculations to obtain the air inlet zone curve fitting information; the acquisition unit obtains the temperature change curve and temperature change rate corresponding to the air inlet zone based on the air inlet zone curve fitting information; the control module includes a comparison unit, which compares the temperature change rate of the air inlet zone with the temperature change rate of the working area to determine whether the difference in the change rate between the two exceeds a preset ratio threshold; if so, the control unit prioritizes adjusting the temperature or wind speed of the air inlet zone.

[0010] Preferably, the first acquisition module further includes a return air zone temperature identification unit, used to statistically analyze the temperature value of the return air zone at the current moment. The calculation unit of the second acquisition module learns the preceding logic and performs synchronous calculations to obtain return air zone curve fitting information. The acquisition unit obtains the temperature change curve and temperature change rate corresponding to the return air zone based on the return air curve fitting information. The comparison unit determines whether the temperature of each area in the device is in a balanced state based on the temperature change rate of the air inlet zone, the temperature change rate of the working zone, and the temperature change rate of the return air zone. If there is a temperature difference, the control unit triggers the activation of the temperature adjustment module and the speed modification module to adjust the temperature or wind speed in the device.

[0011] By adopting the above technical solution, the working area includes the air intake area / working area / return air area. Through multi-area coupling control, the temperature uniformity within the device can be improved compared to single-area detection. By constructing a multi-area collaborative temperature control system, three-dimensional temperature field equilibrium control can be achieved.

[0012] Preferably, in the process of determining whether there is a temperature difference between the working area and / or the air intake area and / or the air return area within the device, the comparison unit first determines whether the difference between the temperature change rate of the air intake area and the temperature change rate of the air return area exceeds a preset ratio threshold. If it does not exceed the preset ratio threshold, it then determines whether the difference between the temperature change rate of the air intake area and the temperature change rate of the working area, and between the temperature change rate of the air return area and the temperature change rate of the working area, exceeds the preset ratio threshold. If any determination exceeds the preset ratio threshold, the control unit adjusts the temperature or wind speed within the device.

[0013] Preferably, the fan assembly includes an intake fan and a working fan. Based on whether there is a temperature difference between the working area and / or the intake air area and / or the return air area within the device, the calculation unit calculates the temperature change value per unit time, obtaining the temperature change rate β = temperature change amount (ΔT) / time interval (Δt). If the comparison unit determines that the temperature change rate of the working area is greater than the temperature change rate of the return air area, and the difference between the two is A≥|0.3|℃ / t, then it is determined that there is a local overheating phenomenon in the working area, and the speed of the working fan needs to be increased, while the temperature of the working area is reduced by the temperature regulator assembly.

[0014] Preferably, the fan assembly includes a return air fan. During the process of determining whether there is a temperature difference between the working area and / or the air intake area and / or the air return area within the device, the calculation unit calculates the learning pre-order logic and simultaneously calculates the temperature change rate β. When the comparison unit determines that the temperature change rate of the air intake area is greater than the temperature change rate of the working area, and the difference between the two is A≥|0.3|℃ / t, it is determined that the temperature rise trend of the air intake area is obvious, and the speed of the air intake fan and the return air fan needs to be increased. At the same time, the temperature of the air intake area is reduced by the temperature regulator assembly.

[0015] By adopting the above technical solutions, a three-level priority judgment mechanism forms a progressive diagnostic network, and differentiated fan response can accurately regulate temperature and distribute airflow based on different conditions within the device. The temperature change rate threshold is dynamically adjusted based on the characteristics of the wax pattern material to improve adaptability. By constructing a multi-level temperature difference judgment system and fan component partition control, the dynamic response accuracy and system energy efficiency ratio in the field of wax pattern printing environment control can be improved.

[0016] Preferably, the device includes a body, a working area, and an exhaust area, wherein the working area and the exhaust area are arranged from top to bottom within the body, and an exhaust module is provided in the exhaust area. The exhaust module is used to drive the air pressure in the exhaust area to be lower than the air pressure in the working area, thereby removing gas from the device.

[0017] Preferably, it includes a discharge area, which is located between the working area and the exhaust area. The discharge area is equipped with a discharge module for collecting wax debris from the working area.

[0018] By adopting the above technical solution, the working area, the discharge area and the exhaust area form an airflow channel. Low-pressure exhaust promotes the natural settling of wax debris, improves the collection efficiency of the discharge module, and the linkage control between the discharge module and the exhaust module avoids airflow disturbance that causes wax debris dust, reducing secondary pollution of the product. This application realizes the integrated design of air pressure gradient control and waste collection, and achieves process optimization and equipment miniaturization in the field of wax pattern printing environment control.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. Compared with the prior art, this application obtains the temperature values ​​of different times and areas in the device through the first acquisition module, the second acquisition module analyzes the temperature change law, and the control module accurately controls the temperature adjustment module and the speed adjustment module according to the temperature change law. Compared with the traditional uniform cooling method, it can better meet the differentiated cooling needs of printed parts of different shapes and materials at different stages, improve the quality and efficiency of wax pattern printing, and solve the problem that the traditional cooling method affects the material forming quality and speed because it cannot accurately control the temperature and wind speed. 2. Compared with the prior art, this application can predict whether the device is overheating by simulating the temperature change trend in advance, and take adjustment measures in a more timely manner to avoid affecting the quality and speed of wax pattern printing due to excessively high or low temperature. This further improves the intelligence level of the device and the accuracy of temperature control. Compared with the method of controlling only based on real-time temperature changes, it can better cope with rapid temperature changes and reduce the adverse effects on the printing process. 3. Compared with existing technologies, this application, through different usage modes, can better meet the application needs of printed parts of different materials, and achieve high-quality production of products in a more energy-efficient, environmentally friendly and reliable manner. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the air circulation device for wax pattern printing in the embodiments of this application.

[0021] Figure 2 This is a schematic diagram of the frame structure of the air circulation device for wax pattern printing in the embodiments of this application.

[0022] Figure 3 This is a flowchart illustrating the first acquisition module in an embodiment of this application.

[0023] Figure 4 This is a flowchart illustrating the second acquisition module in an embodiment of this application.

[0024] Figure 5 This is a flowchart illustrating the control module in an embodiment of this application.

[0025] Figure 6 This is a schematic diagram of airflow in the first usage scenario of the air circulation device for wax pattern printing in the embodiments of this application.

[0026] Figure 7 This is a schematic diagram of airflow in a second usage scenario of the air circulation device for wax pattern printing in the embodiments of this application.

[0027] Figure 8 This is a schematic diagram of airflow in a third usage scenario of the air circulation device for wax pattern printing in the embodiments of this application.

[0028] Explanation of reference numerals in the attached diagram: 1. Machine body; 11. Printer head; 2. Working area; 21. Operation area; 22. Air inlet area; 23. Air return area; 3. Discharge area; 31. Discharge module; 4. Exhaust area; 51. Inlet fan; 52. Working fan; 53. Return fan. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0030] This application discloses an air circulation device for wax pattern printing.

[0031] Reference Figures 1 to 5 An air circulation device for wax pattern printing includes a body 1, a first acquisition module, a second acquisition module, a temperature control module, a speed control module, and a control module. The body 1 is spatially divided into a working area 2, a material discharge area 3, and an exhaust area 4, arranged from top to bottom within the body 1. The first acquisition module, the second acquisition module, the temperature control module, the speed control module, and the control module are all located within the working area 2 of the body 1. The cooperation between these modules allows for the adjustment of the internal temperature and airflow of the device, meeting the differentiated cooling needs of the device and ensuring that the internal temperature better matches the cooling requirements of the printed parts.

[0032] Specifically, to better track temperature changes and airflow speed changes at different locations within the device, in this application, the working area 2 can be divided into a working area 21, an air inlet area 22, and an air return area 23. The first acquisition module acquires the current temperature value of the device; the second acquisition module acquires the temperature change pattern based on the temperature values ​​acquired by the first acquisition module for n+1 consecutive moments; the temperature control module includes a temperature controller assembly, which can change the temperature of the space inside the device; the speed control module includes a fan assembly, which can change the airflow speed of the space inside the device; the control module controls the temperature of the temperature controller assembly and the speed of the fan assembly according to the temperature change pattern, so that the temperature and airflow can be precisely adjusted according to the temperature changes in different stages and areas of wax pattern printing, thereby meeting the effect of differentiated cooling requirements. This is because by acquiring the temperature change pattern, the control module can specifically control the temperature control module and the speed control module, so that the temperature inside the device is more in line with the cooling requirements of the printed parts.

[0033] Furthermore, a discharge module 31 is installed in the discharge area 3 to collect wax debris generated in the working area 2 in a timely manner, preventing wax debris accumulation from affecting the normal operation of the device and printing quality, reducing air pollution, and ensuring the cleanliness of the working environment. An exhaust module is installed in the exhaust area 4 to lower the air pressure in the exhaust area 4 compared to the working area 2 and the discharge area 3, thereby extracting gas from the device, reducing the interference of wax debris on air circulation, and making the air circulation within the device smoother, further improving the efficiency and quality of wax pattern printing. In detail, the first acquisition module includes a work area temperature recognition unit, an air inlet area temperature recognition unit, and a return air area temperature recognition unit. The temperature recognition unit referred to here can be a high-precision temperature sensor. This type of sensor has high sensitivity and can quickly and accurately sense the temperature changes in its area. Then, it converts the temperature change information and transmits it to the second control module and the control module.

[0034] The second acquisition module includes an acquisition unit and a calculation unit. The calculation unit can quickly complete complex curve fitting calculations. The calculation unit is used to perform curve fitting on the temperature values ​​of the work area 21 for n+1 consecutive time periods to obtain the curve fitting information of the work area. Here, n+1 consecutive time periods include the previous n historical time periods and the current time period. Based on the curve fitting information of different areas, the acquisition unit obtains the temperature change curve and temperature change rate corresponding to the area.

[0035] For example, the calculation unit performs curve fitting on the temperature values ​​of the work area 21 at n+1 consecutive times to obtain the work area curve fitting information. Then, the acquisition unit obtains the temperature change curve and temperature change rate corresponding to the work area 21 based on the work area curve fitting information.

[0036] Repeatingly, the calculation unit of the second acquisition module learns the preceding logic and performs synchronous calculations. That is, the calculation unit performs curve fitting on the temperature values ​​of the air inlet zone 22 at n+1 consecutive times to obtain the air inlet zone curve fitting information. Then, the acquisition unit obtains the temperature change curve and temperature change rate corresponding to the air inlet zone 22 based on the air inlet zone curve fitting information. Repeatingly, the calculation unit learns the preceding logic and performs synchronous calculations. That is, the calculation unit performs curve fitting on the temperature values ​​of the return air zone 23 at n+1 consecutive times to obtain the return air zone curve fitting information. Then, the acquisition unit obtains the temperature change curve and temperature change rate corresponding to the return air zone 23 based on the return air zone curve fitting information.

[0037] In other words, the calculation unit and the acquisition unit work together. First, the calculation unit processes the data to obtain curve fitting information, and then the acquisition unit extracts the temperature change curve and temperature change rate from it, so as to accurately grasp the temperature change trend of the area.

[0038] The control module includes a control unit and a comparison unit. The control unit pre-calculates a temperature change threshold based on the temperature change rate and determines whether to trigger the activation of the temperature adjustment module and the speed control module. The comparison unit analyzes the situation based on the temperature change rate of different zones, specifically, it analyzes the situation based on the temperature change rate corresponding to the working zone 21, the air inlet zone 22, and the return air zone 23 obtained by the acquisition unit of the second acquisition module. The comparison unit uses priority when making judgments.

[0039] For example, refer to Figures 3 to 5 First, the temperature change rate of the two areas with the greatest temperature difference within the device is compared. The temperature change rate of the air inlet zone 22 and the temperature change rate of the working zone 21 are compared to determine whether they exceed a preset ratio threshold. If they exceed the preset ratio threshold, the control unit triggers the activation of the thermostat assembly and the fan assembly, prioritizing the adjustment of the temperature or air speed of the air inlet zone 22. If the previous comparison does not exceed the preset ratio threshold, the temperature change rate of the air inlet zone 22, the temperature change rate of the working zone 21, and the temperature change rate of the return air zone 23 are compared pairwise to determine whether there is a temperature difference between the pairs. If a temperature difference exists in any of these cases, it is determined that the temperature of different zones within the device is not in an balanced state. The control unit then triggers the activation of the thermostat assembly to adjust the temperature within the device and the fan assembly to adjust the air speed within the device. If there is no temperature difference between the pairs, the control unit does not trigger any commands and maintains the temperature and air speed within the device.

[0040] When the temperature in different zones of the device is not in a balanced state, the temperature change rate of the two zones with the smallest temperature difference in the device is compared first. The temperature change rate of the air inlet zone 22 and the temperature change rate of the air return zone 23 are compared to determine whether they exceed the preset ratio threshold. If they exceed the preset ratio threshold, the thermostat component is directly triggered to adjust the temperature in the device and the fan component adjusts the air speed in the device.

[0041] If the preset ratio threshold is not exceeded, the calculation unit calculates the temperature change value per unit time, obtaining the temperature change rate β = temperature change (ΔT) / time interval (Δt). The comparison unit compares the temperature change rate of the air inlet zone 22 with that of the operating zone 21. If the difference A ≥ |0.3|℃ / t, it determines that the temperature in the air inlet zone 22 has a significant upward trend. Simultaneously, it compares the temperature change rate of the return air zone 23 with that of the operating zone 21. If the difference A ≥ |0.3|℃ / t, it determines that there is localized overheating in the operating zone 21. If either calculation method calculates a difference greater than or equal to 0.3℃ / t, it directly triggers the activation of the thermostat assembly to adjust the temperature within the device and the fan assembly to adjust the wind speed within the device. When the temperatures in different zones within the device are not in a balanced state, the temperature or wind speed of the operating zone is adjusted first.

[0042] In other words, when calculating the temperature change rate, the temperature difference at the same location in the same area within a unit of time is used. Taking work area 21 as an example, the temperature identification module of work area 21 in the first acquisition module records the temperature of the same test point at each moment and transmits the recorded information to the calculation unit of the second acquisition unit module to perform curve fitting of work area 21. The acquisition unit obtains the temperature change threshold and temperature change rate of work area 21 based on the curve fitting information of work area 21. Typically, in the wax pattern printing process, the first and last temperatures are calculated and the difference is calculated within a 10-minute time frame. For every 3 degrees Celsius increase or decrease, the temperature change rate changes by 0.3℃ / t. The second acquisition module transmits the calculated temperature change rate to the control unit and comparison unit of the control module. Based on the temperature change rate, the comparison unit compares whether the difference between the real-time temperature change rate and the preset temperature change threshold is greater than or equal to 0.3℃ / t. If so, the control unit triggers the activation of the temperature adjustment module and the speed change module. The temperature adjustment module changes the temperature of work area 21, and the speed change module changes the airflow speed of work area 21.

[0043] In this application, the fan assembly of the speed-changing module includes multiple axial or centrifugal fans, which have the characteristics of strong airflow and effective ability to change the air speed inside the device, thus improving air circulation. The fan assembly includes a working fan 52 installed in the working area 21, an intake fan 51 installed in the intake air area, and a return fan 53 installed in the return air area 23. Specifically, the intake fan 51 is installed on the top of the machine body 1 to draw outside air into the device; the working fan 52 is installed on the top of the print head to blow air from top to bottom, which is used to dissipate heat from the wax pattern printed product; the return fan 53 is distributed on the left and right sides of the working fan, but unlike the intake fan 51, the return fan 53 mainly achieves the effect of internal air circulation within the device. In other words, the air temperature blown out by the intake fan 51 is lower than that blown out by the return fan 53, while the air temperature blown out by the working fan 52 is the highest. Therefore, the working area temperature recognition unit is set at the air outlet of the working fan 52, the intake area temperature recognition unit is set at the air outlet of the intake fan, and the return area temperature recognition unit is set at the air outlet of the return fan 53. In this way, the sensitivity of the temperature recognition unit can be improved.

[0044] Furthermore, at least one air velocity sensor is installed in each of the three zones: the working zone, the air intake zone 22, and the return air zone 23. The air velocity sensor is used to identify changes in the air velocity in the zone and adjust the wind speed in different zones as needed.

[0045] The temperature control module's temperature controller component can be a semiconductor cooling chip or a combination of heating wire and heat sink, which has the characteristics of high cooling efficiency and the ability to quickly change the temperature inside the device. In this application, at least the working area and the air inlet area 22 are respectively equipped with temperature controllers, which can realize heating and heat dissipation as needed.

[0046] In addition, a discharge area 3 is provided in the device. The discharge area 3 is located between the working area 2 and the exhaust area 4. The discharge area 3 is equipped with a discharge module 31, which is a collection box with a filter screen. It can intercept and collect wax debris. Specifically, multiple discharge ports are opened through the top and bottom surfaces of the collection box. At the same time, the filter screen covers these two surfaces. The extension direction of the collection box is consistent with the length direction of the device, and the edge of the collection box is connected to the four side walls of the device. It can completely receive the wax debris in the working area 2.

[0047] In this application, the working area 2 also includes a worktable, which provides support for the print head 11, the mechanism driving the print head 11, and the support platform carrying the wax pattern workpiece, etc. The worktable is located above the discharge module 31, with sufficient space between them. The exhaust module can be an air pump, characterized by high extraction efficiency and the ability to quickly extract gas from the device, thereby effectively reducing the air pressure in the exhaust area 4. The exhaust module is installed in a suitable position in the exhaust area 4, at least below the discharge module 31, to ensure effective pressure difference, extracting gas from the device, and incidentally removing harmful gases, wax debris, or excess heat from the device, improving the working environment inside the device, ensuring the quality of wax pattern printing and the health of operators, and contributing to air circulation within the device, thus improving cooling efficiency.

[0048] Furthermore, a receiving module is provided near the output end of the exhaust module in the body 1. The receiving module includes at least a heating element, a receiving trough, and a receiving net. Specifically, the receiving net covers the output end of the exhaust pump of the exhaust module to ensure that gas can be output but wax shavings can be isolated. The heating element can heat and melt the wax shavings attached to the receiving net. The receiving net can be a metal mesh with a melting point above the melting point of the wax shavings. The receiving trough is used to receive the melted wax liquid.

[0049] In practical applications, the air circulation device for wax pattern printing provided in this application has several usage modes. The first mode is as follows: Figure 6During operation, the print head 11 continuously generates heat. The intake fan 51, the working fan 52, and the air pump remain on at all times. Through the cooperation of the first acquisition module, the second acquisition module, and the control unit, the control mechanism determines whether to trigger an increase or decrease in the rotation speed of the intake fan 51 or the working fan 52, and whether to trigger an increase or decrease in the temperature of the thermostat assembly. This mode can quickly achieve air circulation inside and outside the device, and can activate the material collection module to collect the wax debris generated in the working area 2, avoiding the accumulation of wax debris that affects the normal operation of the device and the printing quality. It also reduces the interference of wax debris on air circulation, making the air circulation inside the device smoother, and further improving the efficiency and quality of wax pattern printing.

[0050] The second method, refer to Figure 7 During operation, the print head 11 continuously generates heat. The intake fan 51, working fan 52, and air pump remain on at all times, while the return fan 53 is also turned on. Through the cooperation of the first acquisition module, the second acquisition module, and the control unit, the control mechanism determines whether to trigger an increase or decrease in the rotation speed of the intake fan 51, working fan 52, and return fan 53, and whether to trigger an increase or decrease in the temperature of the thermostat assembly. This mode can, to a certain extent, allow the air inside the device to circulate back, further reducing the temperature difference between the working area 21, the air intake area 22, and the return air area 23, thus avoiding the impact of sudden cooling and heating on wax pattern printing.

[0051] The third type, refer to Figure 8 First, the collection box used in the discharge module 31 is replaced. The selected collection box has multiple discharge ports on its top surface only in the air inlet zone 22 and the working zone 21. The rest of the design is consistent with the collection box described above. Then, a return pipe is connected between the air pump return air zone 23. After the wax debris in the return air is processed by the collection module, the return air re-enters the return air zone 23. Under the cooperation of the first acquisition module, the second acquisition module and the control unit, according to the above control mechanism, it is determined whether to trigger the increase or decrease of the rotation speed of the air inlet fan 51, the working fan 52 and the return air fan 53, and whether to trigger the increase or decrease of the temperature of the thermostat component. This mode can further reduce the temperature difference between the working zone 21, the air inlet zone 22 and the return air zone 23 in the device, avoid the impact of sudden cooling and heating on wax pattern printing, and ensure that the wax debris does not interfere with the air circulation, thereby improving the efficiency and quality of wax pattern printing.

[0052] Compared with existing technologies, this application acquires temperature values ​​at different times and in different areas within the device through a first acquisition module, analyzes temperature change patterns through a second acquisition module, and precisely controls the temperature adjustment module and speed control module based on these temperature change patterns. Compared with traditional uniform cooling methods, this approach better meets the differentiated cooling needs of printed parts of different shapes and materials at different stages, improves the quality and efficiency of wax pattern printing, and solves the problem that traditional cooling methods affect the quality and speed of material forming due to the inability to precisely control temperature and wind speed.

[0053] Compared with existing technologies, this application can predict whether the device is overheating by simulating temperature change trends in advance, and take adjustment measures more promptly to avoid affecting the quality and speed of wax pattern printing due to excessively high or low temperatures. This further improves the intelligence of the device and the accuracy of temperature control. Compared with the method of controlling only based on real-time temperature changes, it can better cope with rapid temperature changes and reduce adverse effects on the printing process.

[0054] Compared with existing technologies, this application, through three different usage modes, can better meet the application needs of printed parts of different materials, and achieve high-quality production of products in a more energy-efficient, environmentally friendly and reliable manner.

[0055] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An air circulating device for wax printing, characterized by comprising: The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device.

2. The air circulation device for wax printing according to claim 1, wherein The application relates to a temperature control method and device.

3. The air circulation device for wax printing according to claim 2, wherein The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. The application relates to a temperature control method and device. 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The air circulation device for wax printing according to claim 3, wherein The first acquisition module further includes a return air zone temperature identification unit for counting the temperature value of the return air zone (23) at the current time, the calculation unit of the second acquisition module learns the previous logic and synchronously calculates to obtain return air zone curve fitting information, and the acquisition unit acquires the temperature change curve and the temperature change rate corresponding to the return air zone (23) according to the return air curve fitting information; the comparison unit judges whether the temperatures of the regions in the device are in an equilibrium state based on the temperature change rate of the air inlet zone (22), the temperature change rate of the working zone (21) and the temperature change rate of the return air zone (23), and if there is a temperature difference, the control unit triggers to start the temperature adjustment module and the speed adjustment module to adjust the temperature or the air speed in the device.

5. The air circulation device for wax printing according to claim 4, wherein During the process of determining whether there is a temperature difference between the working zone (21) and / or the air inlet zone (22) and / or the return air zone (23) in the device, the comparison unit first determines whether the difference between the temperature change rates of the air inlet zone (22) and the return air zone (23) exceeds a preset ratio threshold, and if not, then determines whether the difference between the temperature change rates of the air inlet zone (22) and the working zone (21) and the difference between the temperature change rates of the return air zone (23) and the working zone (21) exceed the preset ratio threshold, and if either of the differences exceeds the preset ratio threshold, the control unit adjusts the temperature or the air speed in the device.

6. The air circulation device for wax printing according to claim 1, wherein The fan assembly includes an air inlet fan (51) and a working fan (52), during the process of determining whether there is a temperature difference between the working zone (21) and / or the air inlet zone (22) and / or the return air zone (23) in the device, the calculation unit calculates the temperature change value in a unit time to obtain the temperature change rate β = temperature change amount (△T) time interval (△t), and the comparison unit determines that the temperature change rate of the working zone (21) is greater than the temperature change rate of the return air zone (23) and the difference between the two is A≥|0.3|℃ / t, and then determines that there is a local overheating phenomenon in the working zone (21), and the speed of the working fan (52) needs to be increased, and the temperature of the working zone (21) is lowered through the temperature regulator assembly.

7. The air circulation device for wax printing according to claim 6, wherein The fan assembly includes a return air fan (53), during the process of determining whether there is a temperature difference between the working zone (21) and / or the air inlet zone (22) and / or the return air zone (23) in the device, the calculation unit calculates the temperature change rate β by learning the previous logic and synchronously calculating, and the comparison unit determines that the temperature change rate of the air inlet zone (22) is greater than the temperature change rate of the working zone (21) and the difference between the two is A≥|0.3|℃ / t, and then determines that the temperature of the air inlet zone (22) has a significant rising trend, and the speeds of the air inlet fan (51) and the return air fan (53) need to be increased, and the temperature of the air inlet zone (22) is lowered through the temperature regulator assembly.

8. The air circulation device for wax printing according to claim 1, wherein The device comprises a body (1), a working area (2) and an exhaust area (4), wherein the working area (2) and the exhaust area (4) are arranged in the body (1) from top to bottom, and an exhaust module is arranged in the exhaust area (4), which is used to drive the air pressure of the exhaust area (4) to be lower than that of the working area (2), so as to realize the exhaust of the gas in the device.

9. The air circulation device for wax printing according to claim 8, wherein The device comprises a discharge area (3) arranged between the working area (2) and the exhaust area (4), and a discharge module (31) arranged in the discharge area (3), which is used to collect the wax scraps in the working area (2).

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