Platform heating and temperature equalizing system for advertisement word 3D printer

Abstract

The utility model relates to the technical field of 3D printing equipment, in particular to a platform heating and temperature equalizing system for an advertisement word 3D printer, which comprises a vapor chamber, a circulating fan, a heater and a cooling fan, the vapor chamber is positioned below a printing platform, the circulating fan and the heater are mounted in a closed chamber below the vapor chamber, and the cooling fan is mounted in the closed chamber. The circulating fan is used for transferring heat generated by the heater to the vapor chamber so that the printing platform can be heated to the preset working temperature, and the cooling fan is used for removing redundant heat in the closed cavity when the temperature needs to be reduced. The effects of rapid and uniform heating and effective temperature control are achieved, and the printing quality and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing equipment, and in particular to a platform heating and temperature equalization system for a 3D printer for advertising characters. Background Art

[0002] With the rise of 3D printing technology in the advertising industry, printing advertising characters with 3D cooling fans has placed higher demands on printing quality and efficiency. Temperature uniformity on the print platform is crucial to ensuring the quality of printed objects. However, the heating systems of existing 3D cooling fan printers have many shortcomings.

[0003] Most 3D printers currently on the market use a relatively simple single-point heating system, such as single-point heating plus fan cooling. While this method can meet basic heating needs to a certain extent and is relatively low-cost, it presents numerous problems in practice. Single-point heating can easily lead to heat concentration near the heating source, causing localized overheating of the print platform. Areas farther from the heating source heat up more slowly, resulting in extremely uneven temperature distribution. During the printing process, this uneven temperature field causes the printed material to cure at different speeds at different locations, affecting the surface flatness and dimensional accuracy of the printed object, ultimately reducing the quality and stability of the final print.

[0004] Furthermore, single-point heating makes it difficult to achieve precise temperature control, failing to quickly and accurately heat the printing platform to the ideal operating temperature range, nor to efficiently remove excess heat when cooling is required. This not only prolongs pre-print preparation time and reduces production efficiency, but can also lead to printing failures due to improper temperature control, increasing material waste and production costs.

[0005] Therefore, based on the above problems, the existing technology needs to be improved. Utility Model Content

[0006] The purpose of this application is to provide a platform heating and temperature equalization system for an advertising word 3D printer, aiming to solve the problems of poor temperature uniformity and inaccurate control of the 3D printer heating system during the advertising word printing process, so as to improve the quality and efficiency of advertising word printing.

[0007] The above technical purpose of the present application is achieved through the following technical solutions: a platform heating and temperature equalization system for an advertising word 3D printer, comprising a heat spreader, a circulating fan, a heater, and a cooling fan, wherein the heat spreader is located below the printing platform, the circulating fan and the heater are installed in a closed chamber below the heat spreader, the circulating fan is used to transfer the heat generated by the heater to the heat spreader to heat the printing platform to a predetermined operating temperature, and the cooling fan is used to remove excess heat in the closed chamber when the temperature needs to be lowered.

[0008] By adopting the above technical solution, the setting of the heat spreader effectively balances the temperature of the printing platform, greatly reducing printing defects caused by local overheating or overcooling, significantly improving the surface flatness and dimensional accuracy of the printed products, and ensuring that the printing quality of advertising characters reaches higher standards. The circulation fan and the heater work together, and with the help of the principle of forced convection, the heat can be quickly and evenly diffused in the closed chamber, prompting the printing platform to quickly heat up to the predetermined operating temperature, which not only shortens the preheating time before printing, but also enhances the accuracy of temperature control. The cooling fan can efficiently remove excess heat in the closed chamber when cooling is required, avoiding the adverse effects of excessive heat accumulation on printing materials and equipment, and further ensuring the stability and reliability of the printing process.

[0009] Optionally, the circulation fan is arranged opposite to the heater, and the axis of the circulation fan and the central axis of the heater are located in the same horizontal plane, and the heat is transferred to the heat spreader by forced convection to heat the printing platform to a predetermined working temperature.

[0010] By adopting the above technical solution, the circulating fan and the heater are arranged opposite to each other and the axis center lines are located in the same horizontal plane, which ensures that the heat generated by the heater can be captured by the circulating fan in the most optimized way and form efficient forced convection. Heat can flow stably and orderly along a specific direction in the closed chamber, avoiding disordered diffusion and local accumulation of heat, thereby greatly improving the efficiency and uniformity of heat transfer to the heat spreader. The printing platform can be quickly and evenly heated to the predetermined operating temperature, effectively reducing the problem of inconsistent curing of printing materials caused by uneven temperature, significantly improving the molding quality of advertising word printing, and making the printed advertising word surface smoother and flatter, the lines clearer and sharper, and the size more precise. The stable forced convection method also makes the system's temperature control more precise and sensitive, and the heating power and fan speed can be flexibly adjusted according to different printing requirements, further improving the stability and reliability of the printing process.

[0011] Optionally, there are multiple circulation fans, and the multiple circulation fans are evenly distributed in the closed chamber.

[0012] By adopting the above technical solution, multiple circulation fans are evenly distributed in the closed chamber, which greatly enhances the disturbance effect of heat in the chamber. Each circulation fan can form an independent convection cycle within its area of ​​action, so that the heat generated by the heater can be diffused more quickly and comprehensively in the entire closed space, avoiding local heat accumulation and significantly improving the uniformity of heat distribution. It ensures that the heat spreader can be heated evenly from all positions, thereby enabling the printing platform to achieve faster and more uniform temperature rise, effectively shortening the preheating time and improving printing efficiency. The evenly distributed circulation fans can provide a more stable and balanced temperature environment for the printing platform, reducing printing defects caused by temperature fluctuations or unevenness.

[0013] Optionally, a plurality of heaters are provided corresponding to the circulation fans.

[0014] By adopting the above technical solution and setting up several heaters corresponding to the circulating fans, a more sufficient heat source can be provided for the system. Each heater works in conjunction with the corresponding circulating fan, making the generation and transfer of heat more accurate and efficient. Multiple heaters can generate heat at different positions at the same time. Combined with evenly distributed circulating fans, a more complex and uniform heat flow field can be constructed in the closed chamber, ensuring that all parts of the heat spreader can quickly and evenly receive sufficient heat, so that the temperature of the printing platform rises more rapidly and the temperature distribution is more even. This not only reduces the problem of local low or high temperature of the printing platform due to insufficient or uneven heat distribution, and improves the quality stability and consistency of the printed products, but also can flexibly adjust the working state of the heater according to different printing requirements to meet the precise temperature requirements of various complex advertising printing tasks.

[0015] Optionally, a shell is provided between the circulation fan and the heater, and the circulation fan, the heater, the shell and the wall of the closed chamber together form an accommodating cavity, and the air inlet of the circulation fan is arranged corresponding to the accommodating cavity.

[0016] By adopting the above technical solution, a shell is set between the circulation fan and the heater, and a housing is formed together with the circulation fan, the heater and the wall of the closed chamber, so that the heat generated by the heater can be better gathered and guided in a relatively closed space. The air inlet of the circulation fan is set corresponding to the housing chamber, which ensures that the fan can directly and efficiently extract heat from the housing chamber, reducing heat loss and waste. The heat transfer path is made clearer and more concentrated, and the efficiency of heat transfer from the heater to the heat spreader is improved, so that the printing platform can be heated to the predetermined working temperature more quickly, shortening the preparation time before printing. The existence of the housing chamber provides a stable environment for the flow of heat, reduces the interference of external factors on heat transfer, and makes the operation of the entire heating and temperature equalization system more stable and reliable. At the same time, the setting of the shell also helps to protect the heater and the circulation fan to a certain extent, extending the service life of the equipment.

[0017] Optionally, a through hole is provided on the shell.

[0018] By adopting the above technical solution, a through hole is provided on the shell, which can play an important role in balancing the air pressure in the accommodating cavity. During the operation of the circulating fan, the flow of airflow may cause the air pressure in the accommodating cavity to change, and the presence of the through hole can make the air pressure in the accommodating cavity maintain a certain dynamic balance with the outside world, ensuring that the airflow can flow stably. It not only avoids the uneven heat distribution caused by the imbalance of air pressure, but also enables the heat generated by the heater to diffuse more evenly in the accommodating cavity and be transferred to the heat spreader through the circulating fan, thereby improving the uniformity of the temperature of the printing platform and ensuring the quality and stability of the printed advertising characters. At the same time, the reasonably set through holes can also regulate the circulation of hot air in the accommodating cavity to a certain extent, prevent excessive heat accumulation, and help the cooling fan to remove excess heat more efficiently when cooling is required, further optimizing the performance of the entire platform heating and temperature equalization system.

[0019] Optionally, a first mounting hole is provided on the circulation fan, and a second mounting hole is provided on the shell at a position corresponding to the first mounting hole.

[0020] By adopting the above technical solution, a clear and stable connection method is provided for the installation of the circulation fan in the entire system. It ensures that the circulation fan can be firmly fixed in a specific position and will not be displaced or loosened due to vibration or other external factors during operation, thereby ensuring that the relative position relationship between the circulation fan and the heater, housing and heat spreader is always stable. The stable position relationship enables the circulation fan to continuously and efficiently transfer the heat generated by the heater to the heat spreader, ensuring the temperature uniformity and stability of the printing platform. At the same time, the clear mounting hole design also facilitates the assembly and maintenance of the equipment. During the production and maintenance process, staff can quickly and accurately perform installation and disassembly operations through these mounting holes, improving production efficiency and the maintainability of the equipment.

[0021] Optionally, a third mounting hole is provided on the heater, and a fourth mounting hole is provided on the shell at a position corresponding to the third mounting hole.

[0022] By adopting the above technical solution, a precise and reliable fixing method is provided for the installation of the heater in the system. The heater can be firmly installed in a predetermined position to avoid displacement due to vibration or other factors during the operation of the equipment, and ensure that its relative position relationship with the circulation fan, housing and heat spreader remains stable. The stable position relationship helps the heat generated by the heater to be transferred to the heat spreader more effectively, improving the efficiency and uniformity of heat transfer, thereby ensuring that the printing platform can be quickly and evenly heated to the predetermined operating temperature. At the same time, the clear mounting hole design facilitates the assembly and maintenance of the equipment. The staff can operate more efficiently and accurately when installing and disassembling the heater, reducing the difficulty of installation and maintenance, and improving production efficiency and the maintainability of the equipment.

[0023] In summary, this application has at least the following beneficial effects:

[0024] 1. The synergistic effect of the heat spreader, circulating fan, and heater achieves uniform heating of the printing platform, avoiding local overheating or overcooling. This significantly improves the surface flatness, dimensional accuracy, and structural strength of the printed advertising products, ensuring high-quality printing results.

[0025] 2. The system can quickly heat up to the predetermined operating temperature and effectively remove excess heat through the cooling fan when needed, achieving precise control of the print platform temperature, meeting different printing requirements, and improving the stability and reliability of the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a cross-sectional view of a platform heating and temperature equalization system for a 3D printer with advertising characters;

[0027] Figure 2This is a schematic diagram of the locations of the circulation fan, heater and cooling fan;

[0028] Figure 3 It is a structural diagram of the shell.

[0029] Reference numerals

[0030] 1. Heat spreader; 2. Circulation fan; 3. Heater; 4. Cooling fan; 5. Printing platform; 6. Sealed chamber; 7. Housing; 8. Through hole; 9. First mounting hole; 10. Second mounting hole; 11. Third mounting hole; 12. Fourth mounting hole; 13. Accommodating chamber. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention and are not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to derive other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0032] The heating system of existing 3D printers generally adopts a single heat source direct heating method. Although this method is low in cost, it is easy to cause local overheating or uneven cooling of the printing platform 5 in actual application, thereby affecting the quality and stability of the final product. To this end, the present application mainly adopts the following scheme: including a heat spreader 1, a circulation fan 2, a heater 3, and a heat dissipation fan 4. The heat spreader 1 is located below the printing platform 5. The circulation fan 2 and the heater 3 are installed in a closed chamber 6 below the heat spreader 1. The circulation fan 2 is used to transfer the heat generated by the heater 3 to the heat spreader 1 so that the printing platform 5 is heated to a predetermined working temperature. The heat dissipation fan 4 is used to remove excess heat in the closed chamber 6 when the temperature needs to be lowered, thereby significantly improving the temperature uniformity of the printing platform 5, reducing the phenomenon of local overheating or uneven cooling, and thus improving the quality and stability of the printed product. The following is a further detailed description of the present application.

[0033] Example 1

[0034] Reference Figure 1-3The embodiment of the present application provides a platform heating and temperature equalization system for an advertising word 3D printer, comprising a heat spreader 1, a circulation fan 2, a heater 3, and a cooling fan 4, wherein the heat spreader 1 is located below the printing platform 5, and the circulation fan 2 and the heater 3 are installed in a closed chamber 6 below the heat spreader 1. The circulation fan 2 is used to transfer the heat generated by the heater 3 to the heat spreader 1 to heat the printing platform 5 to a predetermined operating temperature. The cooling fan 4 is used to remove excess heat in the closed chamber 6 when the temperature needs to be lowered, thereby significantly improving the temperature uniformity of the printing platform 5, reducing local overheating or uneven cooling, and thus improving the quality and stability of the printed product.

[0035] Specifically, the heat spreader 1 includes a metal plate and a coating. The metal plate can be made of aluminum or copper. These two materials have good thermal conductivity and can quickly conduct heat to the entire platform. The coating can be a high-temperature resistant paint or a ceramic coating to prevent the metal plate from oxidizing or corroding under long-term high temperatures. The thickness of the metal plate is generally between 1-3 mm to balance thermal conductivity and cost. The thickness of the coating is generally between 0.1-0.5 mm to ensure good thermal insulation.

[0036] The circulation fan 2 can be a centrifugal fan or an axial flow fan. Centrifugal fans are suitable for situations where large air volume and high pressure are required, and can transfer heat to the heat spreader 1 more effectively. Axial flow fans are suitable for situations where low noise and low energy consumption are required, and are suitable for use in indoor environments. Centrifugal fans are usually made of aluminum alloy or plastic, with the number of blades generally between 5-10 and the diameter between 50-100mm. Axial flow fans are made of plastic or stainless steel, with the number of blades generally between 3-7 and the diameter between 50-100mm. Both types of fans can be fixed to the housing 7 by bolts to ensure stability and reliability.

[0037] The heater 3 can be a resistance wire heater or a PTC heater. Resistance wire heaters are low in cost, easy to manufacture, and suitable for occasions that require continuous heating. PTC heaters have the characteristic of self-regulating temperature and can automatically stop heating after reaching the set temperature to avoid the risk of overheating. Resistance wire heaters are usually made of nickel-chromium alloy wire with a diameter between 0.5-1.5mm and the length can be adjusted according to actual needs. PTC heaters are made of ceramic materials and are generally between 20-50mm in size. Both heaters can be fixed to the housing 7 by welding or snapping to ensure good contact and heat transfer effects.

[0038] The cooling fan 4 is used for active heat dissipation and can effectively reduce the temperature in the closed chamber 6. Preferably, cooling fins can be provided on the cooling fan 4, and the cooling fins are used for passive heat dissipation, which improves the heat dissipation efficiency by increasing the surface area. The cooling fan 4 usually adopts an axial flow fan, which can be made of plastic or aluminum alloy, with a diameter between 50-100mm and the number of blades generally between 3-7. The cooling fins are made of aluminum alloy or copper, with a thickness between 1-3mm, a height between 10-30mm, and a spacing generally between 5-10mm. The cooling fan 4 and the cooling fins can be fixed to the housing 7 by bolts to ensure the heat dissipation effect.

[0039] Reference Figure 1 and Figure 3 A housing 7 is provided between the circulation fan 2 and the heater 3. The housing 7 is made of aluminum alloy or stainless steel and has good thermal conductivity and strength. A first mounting hole 9 and a second mounting hole 10 are provided on the housing 7 for fixing the circulation fan 2 and the heater 3. A third mounting hole 11 is provided on the heater 3, and a fourth mounting hole 12 is provided on the housing 7 at the position corresponding to the third mounting hole 11 to ensure good contact and heat transfer between the heater 3 and the housing 7.

[0040] The shell 7, the circulation fan 2, the heater 3 and the wall of the closed chamber 6 together form a receiving chamber 13, so that the heat generated by the heater 3 can be better gathered and guided in a relatively closed space. The air inlet of the circulation fan 2 is arranged corresponding to the receiving chamber 13, ensuring that the circulation fan 2 can directly and efficiently extract heat from the receiving chamber 13, reducing heat loss and waste. The heat transfer path is made clearer and more concentrated, and the efficiency of heat transfer from the heater 3 to the heat spreader 1 is improved, so that the printing platform 5 can be heated to the predetermined working temperature more quickly, shortening the preparation time before printing. The existence of the receiving chamber 13 provides a stable environment for the flow of heat, reduces the interference of external factors on heat transfer, and makes the operation of the entire heating and temperature equalization system more stable and reliable. At the same time, the setting of the shell 7 also helps to protect the heater 3 and the circulation fan 2 to a certain extent, extending the service life of the equipment.

[0041] Specifically, the circulation fan 2 is arranged opposite to the heater 3, and the axis of the circulation fan 2 and the central axis of the heater 3 are located in the same horizontal plane. The heat is transferred to the heat spreader 1 by forced convection to heat the printing platform 5 to a predetermined working temperature. This ensures that the heat is evenly distributed on the entire platform, avoiding local overheating or uneven cooling. The air inlet of the circulation fan 2 is arranged corresponding to the accommodating chamber 13 to ensure that the air flow enters the closed chamber 6 smoothly and improves the heat transfer efficiency. A through hole 8 is provided on the shell 7 so that heat can be dissipated through the through hole 8, further improving the heat dissipation effect.

[0042] The implementation principle of this embodiment is: the heat generated by the heater 3 is evenly transferred to the heat spreader 1 through the circulation fan 2, ensuring that the temperature of each part of the printing platform 5 is consistent, avoiding local overheating or uneven cooling, and thus improving the quality and stability of the printed product. The combined design of the circulation fan 2 and the heater 3 can quickly heat the printing platform 5 to a predetermined operating temperature, shorten the preheating time, and improve production efficiency. The intelligent control system monitors temperature changes in real time and automatically adjusts the heating and heat dissipation status to ensure that the temperature always remains within the ideal range and avoid the adverse effects of temperature fluctuations. The cooling fan 4 can effectively reduce the temperature in the closed chamber 6, reduce energy consumption, and extend the service life of the equipment.

[0043] Example 2

[0044] The difference between this embodiment and the above embodiments is that a temperature sensor and an intelligent control system are added, which further improves the temperature control accuracy and response speed of the system.

[0045] Specifically, temperature sensors include thermocouples and infrared thermometers. Thermocouples are suitable for situations where high-precision measurement is required, and can maintain stable measurement accuracy over a large temperature range. Infrared thermometers are suitable for situations where non-contact measurement is required, and can monitor temperature changes in real time without interfering with the printing process. Thermocouples are usually made of metal wire with a diameter between 0.5-1.5mm, and the length is adjusted according to actual needs. Infrared thermometers are made of semiconductor materials, with a size generally between 20-50mm, and a measurement distance generally between 10-50cm. The temperature sensor can be fixed to the heat sink 1 by threads or snaps to ensure good contact and measurement effects.

[0046] An intelligent control system consists of a controller and a display. The controller receives signals from the temperature sensor and automatically adjusts heating and cooling settings using a PID algorithm to ensure the temperature remains within the ideal range. The display shows the current and setpoint temperatures, facilitating operator monitoring and adjustment. The controller is typically built using a microprocessor or PLC, offering powerful computing capabilities and communication interfaces. The display uses an LCD or LED screen, typically 5-10 inches in size and with a resolution of 480x320 pixels or higher. The controller and display can be connected via a cable to ensure stable and reliable signal transmission.

[0047] Specifically, temperature sensors are installed at different locations on the vapor chamber 1 to ensure comprehensive monitoring of temperature changes. Based on the received temperature signal, the intelligent control system automatically adjusts the operating status of the circulation fan 2 and heater 3 using a PID algorithm to ensure that the temperature remains within a predetermined range. When the temperature is below the set value, the controller activates the heater 3 and circulation fan 2 to accelerate the heating rate; when the temperature is above the set value, the controller activates the cooling fan 4 to reduce the temperature. In this way, precise temperature control can be achieved, avoiding the adverse effects of temperature fluctuations.

[0048] The operating principle of this embodiment is as follows: a temperature sensor monitors temperature changes in real time, and an intelligent control system automatically adjusts heating and cooling conditions based on the temperature signal, ensuring that the temperature remains within the ideal range and avoiding the adverse effects of temperature fluctuations. The intelligent control system uses a PID algorithm to quickly respond to temperature changes, ensuring real-time and accurate temperature control. A display shows the current and set temperatures, facilitating operator monitoring and adjustment, improving the user experience. The intelligent control system automatically adjusts heating and cooling conditions based on actual needs, avoiding unnecessary energy waste and extending the life of the equipment.

[0049] Example 3

[0050] The difference between this embodiment and the above embodiments is that a multiple redundancy design is added to further improve the reliability and security of the system.

[0051] Specifically, the multi-redundancy design includes backup power supplies, backup fans, and backup sensors. The backup power supply provides temporary power in the event of a primary power failure, ensuring normal system operation. The backup fan can be promptly switched to the primary fan in the event of a failure, preventing temperature runaway. The backup sensor provides accurate temperature data in the event of a primary sensor failure, ensuring accurate temperature control. The backup power supply is typically a battery or UPS, with a capacity of at least 1000mAh and a voltage of approximately 12V. The specifications and models of the backup fan and sensor are identical to those of the primary fan and sensor, ensuring interchangeability and consistency.

[0052] The backup power supply can be connected to the main circuit via a cable, ensuring automatic switchover in the event of a main power failure. The backup fan and backup sensor are connected to the control system via switches or relays, ensuring automatic switchover in the event of a main fan or sensor failure. The backup power supply, backup fan, and backup sensor can all be bolted to the housing 7, ensuring a secure and reliable installation.

[0053] The implementation principle of this embodiment is as follows: Through the multiple redundant design of backup power supplies, backup fans, and backup sensors, the system can continue to operate normally even if the main power supply, main fan, or main sensor fails, thereby improving system reliability and safety. The backup power supply and backup fan can provide temporary support in the event of a main power supply or main fan failure, ensuring the continuity and stability of temperature control. The backup sensor can provide accurate temperature data in the event of a main sensor failure, ensuring accurate temperature control. The multiple redundant design can enhance user confidence, ensure stable system operation in various situations, and avoid production interruptions and losses caused by failures.

[0054] Example 4

[0055] The difference between this embodiment and the above embodiments is that a modular design is added to facilitate maintenance and upgrade.

[0056] Specifically, the modular design includes a detachable circulation fan 2, a heater 3 and a cooling fan 4. The detachable circulation fan 2 and the heater 3 can be connected to the housing 7 by quick-plug connectors, which are convenient for disassembly and replacement. The detachable cooling fan 4 can be fixed to the housing 7 by snap-fit ​​or magnetic attraction, ensuring that the installation is simple and quick. Both the quick-plug connectors and the snap-fit ​​or magnetic attraction methods can be purchased through standard parts to ensure versatility and interchangeability. The detachable circulation fan 2 and the heater 3 can be connected to the housing 7 by quick-plug connectors, which are convenient for disassembly and replacement. The detachable cooling fan 4 can be fixed to the housing 7 by snap-fit ​​or magnetic attraction methods to ensure that the installation is simple and quick. Both the quick-plug connectors and the snap-fit ​​or magnetic attraction methods can be purchased through standard parts to ensure versatility and interchangeability.

[0057] The implementation principle of this embodiment is that the modular design allows for easy disassembly and replacement of individual components, facilitating routine maintenance and troubleshooting. The modular design allows users to replace components of different specifications and models as needed, enhancing the system's flexibility and adaptability. This modular design reduces maintenance and component replacement time, improving production efficiency. It also reduces overall maintenance and upgrade costs, improving the system's economic efficiency.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A platform heating and temperature equalization system for an advertising word 3D printer, characterized in that: The invention comprises a heat spreader (1), a circulation fan (2), a heater (3), and a cooling fan (4), wherein the heat spreader (1) is located below a printing platform (5), the circulation fan (2) and the heater (3) are installed in a closed chamber (6) below the heat spreader (1), the circulation fan (2) is used to transfer the heat generated by the heater (3) to the heat spreader (1) so as to heat the printing platform (5) to a predetermined working temperature, and the cooling fan (4) is used to remove excess heat in the closed chamber (6) when the temperature needs to be lowered.

2. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 1, characterized in that: The circulating fan (2) is arranged opposite to the heater (3), and the axis of the circulating fan (2) and the central axis of the heater (3) are located in the same horizontal plane. The circulating fan (2) transmits heat to the heat diffusion plate (1) by forced convection to heat the printing platform (5) to a predetermined working temperature.

3. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 1, characterized in that: A plurality of the circulation fans (2) are provided, and the plurality of the circulation fans (2) are evenly distributed in the closed chamber (6).

4. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 3, characterized in that: A plurality of the heaters (3) are provided corresponding to the circulation fans (2).

5. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 1, characterized in that: A housing (7) is provided between the circulation fan (2) and the heater (3); the circulation fan (2), the heater (3), the housing (7) and the wall of the sealed chamber (6) together form an accommodating chamber (13); and the air inlet of the circulation fan (2) is provided corresponding to the accommodating chamber (13).

6. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 5, characterized in that: The housing (7) is provided with a through hole (8).

7. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 5, characterized in that: A first mounting hole (9) is provided on the circulation fan (2), and a second mounting hole (10) is provided on the housing (7) at a position corresponding to the first mounting hole (9).

8. The platform heating and temperature equalization system for an advertising word 3D printer according to claim 5, characterized in that: The heater (3) is provided with a third mounting hole (11), and the housing (7) is provided with a fourth mounting hole (12) at a position corresponding to the third mounting hole (11).

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