Post-curing equipment, 3D printing system and post-processing method

Abstract

The invention relates to post-curing equipment, a 3D printing system and a post-processing method. The post-curing equipment comprises a curing bin, a light source unit and a heating unit, and the curing bin is provided with a cavity used for containing a printed piece; the light source unit is used for radiating light to the printing piece in the cavity; the heating unit is used for increasing the temperature in the cavity. The post-curing equipment can meet the requirements of light radiation, temperature rise and the like in the post-curing process at the same time, a printed piece does not need to be frequently transferred in the post-curing process, one-stop curing can be completed in the cavity of the curing bin, the continuity of the post-curing process is guaranteed, and the production efficiency is improved. The curing efficiency is improved; and meanwhile, the printed piece can achieve the optimal performance after being cured.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and particularly to a post-curing device, a 3D printing system, and a post-processing method. Background Art

[0002] When manufacturing a product using a 3D printed part, a liquid printing material (such as a resin material) is cured layer by layer under the irradiation of a light source with a specific wavelength, and finally a three-dimensional object to be printed is constructed.

[0003] Since the three-dimensional object printed and cured layer by layer cannot reach a 100% curing degree completely, there are still unreacted double bonds inside, resulting in the initial state of the printed part being fragile, easy to deform, and the chemical resistance and mechanical properties not reaching the optimal state. It is necessary to further improve the properties such as strength, hardness, durability, and dimensional stability of the printed part through post-curing.

[0004] During the existing post-curing process of printed parts, it is necessary to transfer the printed parts between various curing devices such as light-curing devices and heat-curing devices to meet the requirements of different processes and process parameters during the post-curing process. The 3D printed parts need to be frequently transferred during the post-curing process, resulting in changes in the curing environment, wasting working hours and not ensuring that the printed parts can reach the best performance after curing. Summary of the Invention

[0005] This application provides a post-curing device, a 3D printing system, and a post-processing method to solve the technical problem that in the existing post-curing process, the 3D printed parts need to be frequently transferred, resulting in changes in the curing environment, wasting working hours and not ensuring that the printed parts can reach the best performance after curing.

[0006] In a first aspect, this application provides a post-curing device, including: a curing chamber having a cavity for accommodating a printed part; a light source unit for irradiating light on the printed part inside the cavity; a heating unit for raising the temperature inside the cavity.

[0007] In some embodiments, the post-curing device further includes: a fluid supply unit for introducing a target fluid into the cavity; the target fluid includes a gaseous fluid or a liquid fluid.

[0008] In some embodiments, the gaseous fluid includes an inert gas and / or a low-oxygen gas.

[0009] In some embodiments, the nitrogen content in the low-oxygen gas is 80%-95%; alternatively, the oxygen content in the low-oxygen gas is 3%-15%.

[0010] In some embodiments, the liquid fluid includes water or an organic solvent.

[0011] In some embodiments, the organic solvent includes at least one of an alcohol solvent, a silicone oil solvent, or a paraffin solvent.

[0012] In some embodiments, the fluid supply unit includes an input pipeline and an output pipeline that communicate with the cavity.

[0013] In some embodiments, the curing chamber includes a chamber body and a chamber door, and the chamber door is movably arranged on the chamber body; a seal is provided on the chamber door and / or the chamber body.

[0014] In some embodiments, the material of the seal is a foaming material.

[0015] In some embodiments, the material of the chamber body of the curing chamber is a transparent material, and the light source unit is arranged outside the curing chamber.

[0016] In some embodiments, the light source unit includes a first light-emitting element and a second light-emitting element, and the wavelength band of the light emitted by the first light-emitting element is different from the wavelength band of the light emitted by the second light-emitting element.

[0017] In some embodiments, the heating unit includes a heating element, and the heating element includes at least one of a resistance heating element, an induction heating element, an arc heating element, or a dielectric heating element.

[0018] In some embodiments, the heating unit further includes a heat diffusion component corresponding to the heating element, and the heat diffusion component is configured to promote the heat generated by the heating element to be transferred from a first region inside the cavity to a second region inside the cavity, wherein the average temperature of the first region is higher than the average temperature of the second region, and the printed part is arranged in the second region.

[0019] In some embodiments, the cavity has a first side and a second side arranged opposite to each other, and the heat diffusion component is configured to drive the air flow at the heating element to flow from the first side to the second side.

[0020] In some embodiments, the cavity has a first side and a second side arranged opposite to each other, and a third side adjacent to the first side and the second side respectively, and the heat diffusion component is configured to drive the air flow at the heating element to flow from the first side to the third side, and then from the third side to the second side.

[0021] In some embodiments, the heat diffusion component is further configured to: after the heating element stops heating, start the heat diffusion component to reduce the temperature inside the cavity.

[0022] In some embodiments, the post-curing device further includes a cooling unit, and the cooling unit is used to cool the curing chamber and / or the light source unit.

[0023] In some embodiments, the post-curing device further includes a control unit, and the control unit is respectively connected to the light source unit and the heating unit in a signal connection.

[0024] In a second aspect, the present application provides a 3D printing system, including the post-curing device provided in the first aspect of the present application, and further including: a three-dimensional printing device configured to prepare a printed part.

[0025] In a third aspect, the present application provides a post-processing method, which employs the post-curing device provided in the first aspect of the present application; alternatively, it employs the 3D printing system provided in the second aspect of the present application.

[0026] In some embodiments, the post-processing method includes the following steps: obtaining material information of the printed part; obtaining product information of the printed part; determining a set of process parameter information based on the material information and the product information; the set of process parameter information includes at least one of radiation parameters, heating parameters, and fluid supply parameters.

[0027] In some embodiments, the material information includes at least one of material component information, material property information, and material application information; and / or, the product information includes at least one of product surface property information, product surface dimension information, product mechanical property information, product color requirement information, and product safety requirement information; and / or, the radiation parameters include at least one of light intensity parameters, radiation duration parameters, radiation interval parameters, and wavelength parameters; and / or, the heating parameters include at least one of heating temperature parameters, heating duration parameters, and heating interval parameters; and / or, the fluid supply parameters include at least one of target fluid type parameters, supply amount parameters, concentration parameters, input rate, and output rate.

[0028] In some embodiments, the post-processing method further includes the following steps: controlling a fluid supply unit to supply a target fluid into the cavity based on the fluid supply parameters; controlling a heating unit to increase the temperature in the cavity to a first temperature based on the heating parameters; controlling a light source unit to irradiate light onto the printed part inside the cavity based on the radiation parameters.

[0029] In some embodiments, the post-processing method further includes the following steps: controlling the heating unit to perform re-heating based on the heating parameters to increase the temperature in the cavity to a second temperature, where the second temperature is greater than the first temperature.

[0030] In some embodiments, the post-processing method further includes the following steps: controlling the heating unit to increase the temperature in the cavity to a first temperature based on the heating parameters; controlling the light source unit to irradiate light onto the printed part inside the cavity based on the radiation parameters.

[0031] In some embodiments, controlling the heating unit to perform re-heating based on the heating parameters to increase the temperature in the cavity to a second temperature, where the second temperature is greater than the first temperature.

[0032] In some embodiments, the post-processing method further includes the following steps: controlling the light source unit to emit light at a preset time interval based on radiation parameters.

[0033] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0034] The post-curing device provided by the embodiments of the present application can emit light to the printed part inside the cavity through the light source unit, and the light in a specific wavelength range can cause the photosensitive resin that is not fully cured in the printed part to further achieve deep photocuring; the heating unit is used to increase the temperature inside the cavity, thereby increasing the temperature of the printed part. For different types of printing materials, it can improve the reaction efficiency, reaction degree of photocuring and / or achieve the thermal curing of the resin, thereby improving the efficiency of post-curing. The post-curing device of the present application can simultaneously meet the requirements of light radiation and temperature increase during the post-curing process. During the post-curing process, there is no need to frequently transfer the printed part, and one-stop curing can be completed inside the cavity of the curing chamber, which is beneficial to ensuring the continuity of the post-curing process, improving the curing efficiency and ensuring that the printed part can reach the best performance after curing.

[0035] The 3D printing system and the post-processing method provided by the embodiments of the present application both include or adopt the above post-curing device, and can simultaneously meet the requirements of light radiation and temperature increase during the post-curing process. Therefore, they naturally have the technical effects possessed by the above post-curing device. Description of the Drawings

[0036] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a proportional limitation.

[0039] Figure 1 Is the front view of the post-curing device provided by the embodiments of the present application;

[0040] Figure 2 Is the cross-section of the post-curing device provided by the embodiments of the present application Figure 1 ;

[0041] Figure 3 Cross-section of the post-curing device provided by the embodiment of the present application Figure 2 ;

[0042] Figure 4 Schematic diagram of the post-curing device provided by the embodiment of the present application;

[0043] Figure 5 Schematic diagram of air flow drive provided by the embodiment of the present application Figure 1 ;

[0044] Figure 6A Schematic diagram of air flow drive provided by the embodiment of the present application Figure 2 ;

[0045] Figure 6B Schematic diagram of air flow drive provided by the embodiment of the present application Figure 3 ;

[0046] Figure 7 Schematic diagram of the partial structure of the post-curing device provided by the embodiment of the present application Figure 1 ;

[0047] Figure 8 Schematic diagram of the partial structure of the post-curing device provided by the embodiment of the present application Figure 2 ;

[0048] Figure 9 Schematic control diagram of the 3D printing system provided by the embodiment of the present application.

[0049] Explanation of reference numerals:

[0050] 1. Curing chamber; 11. Cavity; 111. First side; 112. Second side; 113. Third side; 114. First region; 115. Second region; 12. Chamber body; 13. Chamber door; 14. Sealing member; 15. Tray; 16. Flow guiding partition; 17. Temperature detection member;

[0051] 2. Light source unit; 21. First light emitting element; 22. Second light emitting element;

[0052] 3. Heating unit; 31. Heating element; 32. Heat diffusion assembly;

[0053] 4. Fluid supply unit; 41. Input pipeline; 42. Output pipeline; 43. Communication hole; 44. Valve member;

[0054] 5. Cooling unit; 51. Heat dissipation assembly; 52. Fan assembly;

[0055] 6. Control unit;

[0056] 7. Housing; 71. Operation panel; 72. Air inlet; 73. Air outlet; 74. Communication component;

[0057] 8. 3D printing device;

[0058] 9. Processing unit. Detailed implementation manners

[0059] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0060] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0061] For ease of description, spatially relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure relative to another element or feature, such as "inside", "outside", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. In addition, "first" and "second" are not for expressing order or priority, but only for expressing differences in components, functions, roles, etc.

[0062] To solve the technical problem in the prior art that during the post-curing process, the 3D printed parts need to be frequently transferred, resulting in changes in the curing environment, wasting working hours and unable to ensure that the printed parts can reach the best performance after curing, the present application provides a post-curing device, a 3D printing system and a post-processing method. The post-curing device can simultaneously meet requirements such as light radiation and temperature increase during the post-curing process. During the post-curing process, there is no need to frequently transfer the printed parts, and one-stop curing can be completed inside the cavity of the curing chamber, which is beneficial to ensuring the continuity of the post-curing process, improving the curing efficiency and ensuring that the printed parts can reach the best performance after curing.

[0063] Please refer to Figures 1 to 9 , a first aspect of the embodiments of the present application provides a post-curing device, including a curing chamber 1, a light source unit 2 and a heating unit 3, asFigure 1 , Figure 2 and Figure 3 as shown.

[0064] Among them, the curing chamber 1 has a cavity 11 for accommodating the printed part, so as to facilitate the post-curing process of the printed part in the curing chamber 1. The light source unit 2 is used to irradiate light on the printed part inside the cavity 11, and can initiate the further curing of the incompletely cured photosensitive resin in the printed part to the completely cured state through light in a specific wavelength range, realizing deep photocuring. For example, through post-treatment photocuring, the curing degree can be further increased from 70% to 99%. For example, if a dual-curing resin is used for printing the printed part, the post-curing process can cause the resin to crosslink and cure twice, and crosslink and cure the uncrosslinked part of the resin during the secondary curing, thereby completing the final curing of the printed part. The heating unit 3 is used to increase the temperature inside the cavity 11, and for different types of printing materials, it can improve the reaction efficiency, reaction degree of photocuring and / or realize the thermal curing of the resin, thereby improving the efficiency of post-curing. For example, the movement of molecular chains in the printed part can be accelerated by high temperature to promote crosslinking and realize the thermal curing of the printed part.

[0065] In some embodiments of the present application, please refer to Figure 1 , Figure 2 and Figure 4 , the post-curing device further includes a fluid supply unit 4. The fluid supply unit 4 is used to introduce a target fluid into the cavity 11, so that the printed part is immersed in the fluid atmosphere formed by the target fluid, which can reduce the oxygen concentration inside the cavity 11, inhibit the oxygen inhibition effect, and improve the curing efficiency. The fluid supply unit 4 can be a gas source and a fluid pipeline.

[0066] The target fluid includes a gaseous fluid or a liquid fluid. As long as a low-oxygen environment can be formed around the printed part through the flow of the target fluid inside the cavity 11, the purpose of the present application can be achieved.

[0067] It should be noted that the post-curing device in the present application has functions such as light radiation, temperature increase and fluid atmosphere supply, and can adjust parameters and the opening sequence according to different process requirements. There is no need to transfer the workpiece due to changes in post-curing requirement parameters, and one-stop curing can be completed inside the cavity 11 of the curing chamber 1, which is beneficial to ensuring the continuity of the post-curing process, greatly improving the curing efficiency and ensuring that the printed part can reach the best performance after curing.

[0068] In some embodiments of the present application, when the target fluid includes a gaseous fluid, the gaseous fluid includes an inert gas or a low-oxygen gas. By purging or introducing the gaseous fluid into the cavity 11, the oxygen concentration inside the cavity 11 can be reduced. Through the low-oxygen environment, the resin molecular chains in the printed part can be fully crosslinked to form a dense network structure, which can improve the hardness of the printed part.

[0069] It should be noted that the inert gas can include argon, helium, etc., and can be specifically selected according to factors such as the cost and stability performance (such as thermal stability) of the inert gas. In addition, nitrogen can also perform the same function.

[0070] In some embodiments of the present application, due to the advantages of nitrogen such as easy availability, low cost, not easily reacting with the curing material, and high safety, nitrogen is preferably introduced into the cavity 11 as the gaseous fluid.

[0071] In some embodiments of the present application, when the gaseous fluid includes a low-oxygen gas, the nitrogen content in the low-oxygen gas is 80%-95%, and a fluid atmosphere with an oxygen concentration lower than 20% can be formed inside the cavity 11, which can significantly reduce the reaction of oxygen with the photosensitizer or free radicals and prevent the polymerization reaction, resulting in the risk of incomplete surface curing, stickiness, or decreased adhesion.

[0072] In some preferred embodiments of the present application, the oxygen content in the low-oxygen gas is 3%-15%, which can limit the oxygen content inside the cavity 11 to a lower concentration range, facilitating the guarantee of the curing effect and quality of the printed part inside the cavity 11.

[0073] In some embodiments of the present application, the gaseous fluid includes an inert gas and a low-oxygen gas. When introducing the low-oxygen gas, the oxygen content can be precisely controlled through vacuum suction assistance or inert gas purging to reduce the quality fluctuation during the post-curing process.

[0074] In some embodiments of the present application, when the target fluid includes a liquid fluid, the liquid fluid includes water or an organic solvent. The printed part can be completely immersed in water or an organic solvent to isolate the contact between oxygen and the printed part, forming an approximately oxygen-free fluid atmosphere around the printed part, which can greatly reduce or avoid the oxygen inhibition effect and improve the post-curing efficiency.

[0075] In some embodiments of the present application, when the target fluid includes water, the printed part is completely immersed in water, and oxygen can be isolated by the water, improving the post-curing effect.

[0076] In some other embodiments of the present application, when the target fluid includes an organic solvent, the organic solvent includes at least one of alcohol solvents, silicone oil solvents, or paraffin solvents. These organic solvents not only have the advantages of being transparent, having a low dissolved oxygen rate, and not reacting with the photosensitive resin, but also have the characteristic of being easy to clean, making it difficult for the organic solvent to adhere to the surface of the cured workpiece, which is beneficial to improving the curing quality of the printed part.

[0077] In some embodiments of the present application, the alcohol solvent can be ethanol, butanediol, propylene glycol, glycerol, polyethylene glycol, etc.; the silicone oil solvent can be methyl silicone oil, hydrogen-containing silicone oil, water-soluble silicone oil, benzyl silicone oil, etc.; the paraffin solvent can be liquid paraffin or liquid chlorinated paraffin, etc.; all of which can achieve the purpose of the present application.

[0078] In some embodiments of the present application, please refer to Figure 2 , Figure 4 and Figure 7 , the fluid supply unit 4 includes an input pipeline 41 and an output pipeline 42 that communicate with the cavity 11, which can be used to realize the input and output of the target fluid inside the cavity 11. A communication hole 43 communicating with the cavity 11 is provided on the curing chamber 1, which can be used for sealing connection with the input pipeline 41 or the output pipeline 42.

[0079] In order to realize the on-off control of the input pipeline 41 and the output pipeline 42, the fluid supply unit 4 further includes a valve member 44, which can be used to realize the on-off and flow rate control of the target fluid. The valve member 44 can be an electromagnetic valve, a hydraulic valve, a pneumatic valve, or a manual valve, all of which can achieve the purpose of the present application.

[0080] It should be noted that when the target fluid includes a gaseous fluid, when forming a low-oxygen environment inside the cavity 11, gaseous fluid (such as nitrogen, low-oxygen gas, etc.) can be introduced through the input pipeline 41 while the original air inside the cavity 11 is discharged through the output pipeline 42. It is also possible to first evacuate the inside of the cavity 11 to a vacuum state through the output pipeline 42 and then introduce gaseous fluid through the input pipeline 41; it is also possible to continuously purge the printed part with gaseous fluid during the post-curing process, all of which can achieve the purpose of the present application.

[0081] In some embodiments of the present application, please refer to Figure 1 , the curing chamber 1 includes a chamber body 12 and a chamber door 13, and the chamber door 13 is movably arranged on the chamber body 12; a sealing member 14 is provided on the chamber door 13 and / or the chamber body 12. When the chamber door 13 covers the chamber body 12, a sealed cavity 11 can be formed inside the chamber body 12, avoiding the leakage of the target fluid inside the cavity 11 and also avoiding the leakage of heat inside the cavity 11, realizing the heat preservation of the temperature inside the cavity 11.

[0082] In some embodiments of the present application, please refer to Figure 1, when the target fluid includes a gaseous fluid, the hatch door 13 can be arranged at the top of the chamber body 12 or on any side in the circumferential direction, and the gaseous fluid inside the cavity 11 can be sealed and heat-insulated through the seal 14.

[0083] In some other embodiments of the present application, when the target fluid includes a liquid fluid, it is preferably to arrange the hatch door 13 at the top of the chamber body 12, making the opening of the chamber body 12 face upward, which is beneficial to containing the liquid fluid and reducing the possibility of the liquid fluid leaking between the hatch door 13 and the chamber body 12. In addition, even if the cavity 11 is filled with liquid fluid, the hatch door 13 can be opened from the top of the chamber body 12 to pick up, place and adjust the printed parts inside the cavity 11, which is beneficial to improving the convenience of the post-curing operation.

[0084] In some embodiments of the present application, please refer to Figure 1 , the seal 14 is arranged along the four peripheral edges of the hatch door 13, and / or the seal 14 is arranged along the four peripheral edges of the opening of the chamber body 12. As long as the sealing and heat insulation of the cavity 11 can be achieved, the purpose of the present application can be realized.

[0085] In the above embodiments, the material of the seal 14 can be rubber, plastic or composite material. As long as the sealing and heat insulation requirements of the cavity 11 in the curing chamber 1 can be met, the purpose of the present application can be realized.

[0086] In some preferred embodiments of the present application, the material of the seal 14 is a foaming material, specifically, it can be a rubber-based foaming material, a plastic-based foaming material, a polyurethane foaming material, etc., which can make the seal 14 have excellent elasticity, sealing performance and heat insulation performance.

[0087] As a specific embodiment of the present application, the material of the seal 14 is a polyurethane foaming material. Since polyurethane is a polymer material with designable properties, it has both the rigidity of plastic and the elasticity of rubber.

[0088] When manufacturing the seal 14, chemical foaming agents such as polyurethane (PU) are used to carry out chemical reactions under specific conditions, generating bubbles and curing into a shape. After foaming, there are no gaps, cracks or drips, forming a uniform and dense seal 14, which is convenient to manufacture. It can improve the sealing performance and heat insulation performance between the chamber body 12 and the hatch door 13, and reduce the energy consumption of the post-curing equipment. At the same time, the seal 14 made of polyurethane foaming material also has high temperature resistance and corrosion resistance, which is beneficial to improving the service life of the seal 14.

[0089] In some embodiments of the present application, the light source unit 2 can be disposed inside the cavity 11 of the curing chamber 1, or outside the cavity 11 of the curing chamber 1, and the purpose of the present application can be achieved as long as it can radiate light to the printed part inside the cavity 11. However, when the light source unit 2 is disposed inside the cavity 11, it will not only occupy the space inside the cavity 11, but also need to consider the impact of the installation of the light source unit 2 on the sealing performance inside the cavity 11, and the impact of the temperature increase of the target fluid and the cavity 11 on the service life of the light source unit 2.

[0090] In order to solve the above problems, in some embodiments of the present application, please refer to Figure 2 , Figure 3 and Figure 4 The material of the chamber body 12 and / or the tray 15 of the curing chamber 1 is transparent material, and the light source unit 2 is arranged outside the curing chamber 1, so that the light emitted by the light source unit 2 can pass through the transparent curing chamber 1 into the cavity 11 to radiate the printed part inside the cavity 11, so that the installation of the light source unit 2 will not affect the sealing performance of the cavity 11.

[0091] In some preferred embodiments of the present application, the chamber body 12 and the chamber door 13 are made of double-layer glass, which has good light transmittance and heat preservation performance, and is conducive to achieving light curing and / or heat curing of the print inside the cavity 11.

[0092] It should be noted that the light source unit 2 includes one or more light-emitting elements, the chamber body 12 and / or the chamber door 13 are made of transparent high-temperature resistant material, and the light-emitting elements can be arranged on one or more sides outside the curing chamber 1.

[0093] In some embodiments of this application, please refer to Figure 2 , Figure 3 and Figure 4 The light source unit 2 includes a first light emitting element 21 and a second light emitting element 22. The wavelength of the light emitted by the first light emitting element 21 is different from the wavelength of the light emitted by the second light emitting element 22. For example, the first light emitting element 21 emits a wavelength in the range of 380 to 389 nm, and the second light emitting element 22 emits a wavelength in the range of 420 to 429 nm. The light source unit 2 can emit light of different wavelengths according to the curing needs, and the light can be ultraviolet light.

[0094] It should be noted that the number of the first light-emitting element 21 and the second light-emitting element 22 can also be one or more, and their arrangement positions relative to the curing chamber 1 can be arranged according to the light source arrangement requirements.

[0095] In some embodiments of this application, please refer to Figure 2 , Figure 3 and Figure 4, the heating unit 3 includes a heating element 31, and the heating element 31 includes at least one of a resistance heating element, an induction heating element, an arc heating element, or a dielectric heating element. As long as the temperature inside the cavity 11 can be increased, the object of the present application can be achieved.

[0096] In some embodiments of the present application, please refer to Figure 3 and Figure 4 , the heating unit 3 further includes a heat diffusion component 32 correspondingly arranged with the heating element 31. The heat diffusion component 32 is configured to promote the heat generated by the heating element 31 to be transferred from the first region 114 inside the cavity 11 to the second region 115 inside the cavity 11, where the average temperature of the first region 114 is higher than that of the second region 115. The printed part is arranged in the second region 115, which can make the heat diffuse into the second region 115 in a relatively uniform manner, avoid the problem of obvious temperature field imbalance when the printed part is cured, and is beneficial to ensuring the curing quality.

[0097] In order to avoid the volatilization of organic solvents during heating, in some preferred embodiments of the present application, the target fluid includes a gaseous fluid, and the heating element 31 can be used to heat the gaseous fluid inside the cavity 11, thereby increasing the temperature inside the cavity 11.

[0098] In some embodiments of the present application, please refer to Figure 5 , the cavity 11 has a first side 111 and a second side 112 arranged opposite to each other, and the heat diffusion component 32 is configured to drive the air flow at the heating element 31 to flow from the first side 111 to the second side 112 ( Figure 5 the arrow direction in is the air flow direction), so that the air flow with heat is evenly diffused into the cavity 11, thereby forming a temperature field with uniform temperature around the printed part.

[0099] In some other embodiments of the present application, please refer to Figure 6A , the cavity 11 has a first side 111 and a second side 112 arranged opposite to each other, and a third side 113 adjacent to the first side 111 and the second side 112 respectively. The heat diffusion component 32 is configured to drive the air flow at the heating element 31 to flow from the first side 111 through the flow guiding partition 16 to the third side 113, and then from the third side 113 to the second side 112, and the uniform diffusion of heat inside the cavity 11 can be achieved through the reverse flow of the air flow ( Figure 6A the arrow direction in is the air flow direction).

[0100] In some embodiments of the present application, please refer to Figure 6A and Figure 6BA guide baffle 16 is provided inside the cavity 11 to guide the airflow. The shape of the guide baffle 16 can be a bent plate or a straight plate, etc. As long as the airflow can flow through the first side 111, the third side 113 and the second side 112 in sequence, the purpose of the present application can be achieved.

[0101] As a specific embodiment of this application, please refer to Figure 6A The first side 111 and the second side 112 are respectively the left and right sides of the cavity 11, and the third side 113 can be the upper side or the lower side of the cavity 11. The airflow flows toward the right side, and after being guided by the guide baffle 16, it flows to the upper side or the lower side of the cavity 11, and then flows in a vertical direction through a plurality of airflow holes opened on the guide baffle 16, and finally flows toward the right side, so as to realize uniform diffusion of the airflow with heat.

[0102] It should be noted that the guide baffle 16 is also made of transparent material, which can achieve high-temperature airflow guidance while avoiding affecting light radiation.

[0103] In some embodiments of the present application, the heat diffusion component 32 is also configured as follows: after the heating element 31 stops heating, the heat diffusion component 32 is started to lower the temperature inside the cavity 11, so as to achieve rapid cooling of the cavity 11 and the printed part, and facilitate timely removal of the completed and solidified printed part from the cavity 11.

[0104] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 7 A tray 15 for placing printed parts is provided inside the curing chamber 1. In order to prevent the tray 15 from affecting the flow of airflow inside the cavity 11, the placement plate of the tray 15 is configured to have a hollow structure. The hollow structure can be holes, grooves, etc., and a grid or mesh is formed on the surface of the placement plate, which can achieve the purpose of the present application.

[0105] In some embodiments of this application, please refer to Figure 4 In order to facilitate the temperature control inside the cavity 11, a temperature detection member 17 is also provided inside the cavity 11 to monitor the temperature inside the cavity 11, thereby controlling the heating temperature of the heating element 31 to meet the heating parameter requirements of the post-curing process.

[0106] In some embodiments of the present application, the heating element 31 is a heating tube arranged inside the cavity 11, and the heat diffusion component 32 can be a component such as a fan that can drive the airflow. As long as the airflow with heat can be diffused inside the cavity 11, the purpose of the present application can be achieved.

[0107] As a specific embodiment of the present application, the heat diffusion component 32 is a fan blade component driven by a motor, which can blow the hot air flow at the heating element 31 with positive pressure, so that the hot air flow is evenly diffused inside the cavity 11, such as Figure 3 , Figure 4 , Figure 5 and Figures 6A - 6B shown.

[0108] In some embodiments of the present application, when the required temperature inside the cavity 11 is determined, the heating element 31 starts working to heat the airflow near the heating element 31 to the required temperature; while the heating element 31 is working, the heat diffusion assembly 32 is started to blow the heated hot airflow evenly to various locations inside the cavity 11, and this hot airflow forms a powerful circulating airflow driven by the fan blade assembly.

[0109] In some preferred embodiments of the present application, in order to ensure a more uniform air circulation, radially-discharging paddle-type fan blades are used, which are characterized in that the wind blows out radially from the fan blades, so the blown hot air flow will cover a larger area, which is conducive to ensuring the uniformity of the temperature in the cavity 11. If conventional axially-discharging fan blades are used, due to the limitations of the fan blade size and the space in the cavity 11, the wind blown out by the axially-discharging fan blades is relatively concentrated, and the heat taken away from the heating element 31 is relatively limited, which is not conducive to ensuring the uniformity of the temperature in the cavity 11.

[0110] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 The post-curing device also includes a cooling unit 5, which is used to cool the curing chamber 1 and / or the light source unit 2. The cooling unit 5 can quickly reduce the temperature of the curing chamber 1 after the post-curing is completed to avoid scalding accidents when the operator takes out the print; and / or continuously cool the light source unit 2 to avoid the heating of the lamp board affecting the service life of the light source unit 2.

[0111] In some embodiments of the present application, the cooling unit 5 can use air cooling, liquid cooling, etc. to cool the curing chamber 1 and / or the light source unit 2. In order to reduce the pipeline laying in the post-curing equipment and reduce the structural complexity of the post-curing equipment, it is preferred to use air cooling to cool the components inside the post-curing equipment.

[0112] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8, the cooling unit 5 includes a heat dissipation component 51 and a fan component 52. The heat dissipation component 51 is used to be in contact with the curing chamber 1 and / or the light source unit 2, so as to transfer the heat of the component to be cooled into the heat dissipation component 51, and dissipate the heat through the convection of the heat dissipation component 51 and the air. The fan component 52 is used to perform forced air cooling on the heat dissipation component 51, take away the heat on the heat dissipation component 51 with higher efficiency, and improve the cooling efficiency of the cooling unit 5.

[0113] In some embodiments of the present application, please refer to Figure 1 , Figure 2 and Figure 7 , the post-curing device further includes a housing 7. The housing 7 covers the outside of the curing chamber 1 and the cooling unit 5, which can protect the curing chamber 1 to prevent the operator from being scalded when directly contacting the outer wall of the curing chamber 1, and can also form a cooling air duct between the inner wall of the housing 7 and the outer wall of the curing chamber 1, so as to facilitate the fan component 52 to drive the air flow near the heat dissipation component 51 to move along a preset path, thereby improving the heat exchange efficiency and cooling efficiency of the heat dissipation component 51.

[0114] In some embodiments of the present application, please refer to Figure 1 , Figure 2 and Figure 7 , the left and right sides of the housing 7 are respectively provided with an air inlet 72 and an air outlet 73, which are respectively arranged corresponding to the two ends of the cooling air duct. The air flow is sucked into the housing 7 from the air inlet 72 on one side by the fan component 52, exchanges heat with the heat dissipation component 51 in the cooling air duct, and then is discharged from the air outlet 73 through the fan component 52 on the other side, which can improve the flow speed and heat exchange efficiency of the air flow in the cooling air duct.

[0115] In some embodiments of the present application, please refer to Figure 2 and Figure 3 , the heat dissipation component 51 is in contact with the lamp board of the light-emitting element, and can transfer the heat generated by the light-emitting element into the heat dissipation component 51. The heat dissipation component 51 includes a plurality of heat dissipation fins, which can greatly increase the heat dissipation area of the heat dissipation component 51, thereby improving the cooling efficiency of the cooling unit 5.

[0116] In some embodiments of the present application, please refer to Figure 8 and Figure 9 , the post-curing device further includes a control unit 6. The control unit 6 is respectively signal-connected to the light source unit 2, the heating unit 3, the fluid supply unit 4 and the cooling unit 5, and can be used to realize the intelligent control of the post-curing device, so as to realize the coordinated cooperation between the light source unit 2, the heating unit 3, the fluid supply unit 4 and the cooling unit 5 according to the needs of the post-curing process.

[0117] In some embodiments of the present application, please refer to Figure 1, an operation panel 71 is provided on the outer shell 7, and manual operation can be used to send control information to the control unit 6, so that the control unit 6 generates a control program for the post-curing process according to the manually input information.

[0118] In some embodiments of the present application, please refer to Figure 1 , a communication component 74 is further provided on the outer shell 7. The communication component 74 is signal-connected to the control unit 6, so as to facilitate information interaction between the post-curing device and other devices through the communication component 74. Specifically, the communication component 74 can be an antenna, which can be used to realize wireless communication between the post-curing device and other devices.

[0119] In the above embodiments, the startup sequence and parameter settings of the light source unit 2, the heating unit 3, the fluid supply unit 4, and the cooling unit 5 can be set according to different stages of the post-curing process. The target fluid can be filled first, then heated, then photocured, and finally heated and baked. Or the above steps can be adjusted according to needs (the adjustment includes swapping the order and adding or subtracting process steps, etc.).

[0120] After the post-curing of the printed part is completed, the fan blade assembly of the heat dissipation component 32 can be kept on while the heating element 31 is turned off, which can strengthen the convection inside the curing chamber 1 and quickly reduce the temperature inside the cavity 11; at the same time, the heat of the curing chamber 1 can also be taken away by the cooling unit 5, so that the curing chamber 1 can be quickly cooled, facilitating the user's subsequent operations.

[0121] Please refer to Figures 1 to 9 , the second aspect of the embodiments of the present application provides a 3D printing system, including the post-curing device described in the above embodiments, and further including a three-dimensional printing device 8. The three-dimensional printing device 8 is used to prepare a printed part by layer-by-layer curing. The post-curing device further promotes the resin cross-linking inside the printed part through additional ultraviolet irradiation or heating, thereby improving the strength, stability, and chemical resistance of the printed part.

[0122] In some embodiments of the present application, the 3D printing system further includes a processing unit 9. The processing unit 9 is respectively signal-connected to the post-curing device and the three-dimensional printing device 8, and can realize information interaction and collaborative control between the printing process and the post-curing process of the printed part.

[0123] Please refer to Figures 1 to 9 , the third aspect of the embodiments of the present application provides a post-treatment method, which uses the post-curing device described in the above embodiments; or, uses the 3D printing system described in the above embodiments, and can perform post-treatment on the printed part after layer-by-layer curing to make the printed part meet the final use requirements.

[0124] It should be noted that post-curing is a key step in the post-processing process, which focuses on improving the physical and chemical properties of the printed parts and can ensure the stability and lifespan of the printed parts during use.

[0125] In some embodiments of the present application, the post-processing method includes the following steps: obtaining the material information of the printed part; obtaining the product information of the printed part; determining a set of process parameter information based on the material information and the product information; the set of process parameter information includes at least one of radiation parameters, heating parameters, and fluid supply parameters.

[0126] Among them, the radiation parameters are used to control the light source unit 2; the heating parameters are used to control the heating unit 3, and the fluid supply parameters are used to control the fluid supply unit 4, so as to apply a suitable radiation environment, temperature environment, and fluid atmosphere according to the material characteristics and product characteristics of the printed part, so that the printed part can achieve the best performance during the post-curing process.

[0127] In some embodiments of the present application, the material information includes at least one of material component information, material property information, and material application information. Specifically, the material component information can be the main components of the material and the number of component types (such as single-component, two-component, multi-component, etc.); the material property information includes physical properties (such as density, melting point, coefficient of thermal expansion, etc.), mechanical properties (such as strength, etc.), and chemical properties (such as corrosion resistance, etc.); the material application information includes application fields and processing technologies, etc.

[0128] In some embodiments of the present application, the product information includes at least one of product surface property information, product surface dimension information, product mechanical property information, product color requirement information, and product safety requirement information. Specifically, the product surface property information includes hardness, roughness, wear resistance, etc.; the product surface dimension information includes product dimensions and dimensional accuracy, etc.; the product mechanical property information includes strength, toughness, elasticity, etc.; the product color requirement information includes color standards, color difference ranges, and yellowing control requirements, etc.; the product safety requirement information includes types and contents of toxic substances, etc.

[0129] In some embodiments of the present application, the material information and / or the product information can be obtained by at least one of manual input, automatic import, and scanning recognition; among them, the scanning recognition can be in the forms of image recognition, two-dimensional code recognition, barcode recognition, or radio frequency recognition, etc.

[0130] In some embodiments of the present application, the radiation parameters include at least one of light intensity parameters, radiation duration parameters, radiation interval parameters, and wavelength parameters.

[0131] In some embodiments of the present application, the heating parameters include at least one of heating temperature parameters, heating duration parameters, and heating interval parameters.

[0132] In some embodiments of the present application, the fluid supply parameters include at least one of a target fluid type parameter, a supply quantity parameter, a concentration parameter, an input rate, and an output rate.

[0133] In some embodiments of the present application, the process parameter information set further includes the process sequence and frequency information to facilitate planning a reasonable process according to the material information and product information of the printed part.

[0134] It should be noted that the post-treatment method of the present application can output at least one of the radiation parameters, heating parameters, and fluid supply parameters by obtaining at least one of the material information and product information. The specific corresponding relationship can be determined according to the actual process conditions and is not limited herein.

[0135] In some embodiments of the present application, the post-treatment method further includes the following steps: controlling the fluid supply unit 4 to supply a target fluid into the cavity 11 based on the fluid supply parameters to form a low-oxygen environment inside the cavity 11 and realize the low-oxygen function (fluid atmosphere supply function) of the post-curing device; controlling the heating unit 3 to increase the temperature inside the cavity 11 to a first temperature based on the heating parameters to heat the fluid temperature inside the cavity 11 and realize the high-temperature function of the post-curing device, so as to facilitate the thermal curing of the printed part inside the cavity 11; controlling the light source unit 2 to irradiate light on the printed part inside the cavity 11 based on the radiation parameters, so as to facilitate the deep-level photocuring of the printed part under the irradiation of light such as ultraviolet light. For example, first control the fluid supply unit 4 to supply nitrogen with a concentration of 97% into the cavity 11 for 5 minutes, control the heating unit 3 to increase the temperature inside the cavity 11 to 40 °C, place the printed part at this temperature for heating for 5 minutes, and then control the light source unit to perform radiation curing, such as curing for 5 minutes under the radiation parameters of a wavelength of 385 nm and a light intensity of 1000 W / m 2 to complete the entire post-curing process.

[0136] Furthermore, the post-treatment method further includes the following steps: controlling the heating unit 3 to perform re-heating based on the heating parameters to increase the temperature inside the cavity 11 to a second temperature, where the second temperature is greater than the first temperature, so as to perform in-cavity baking on the printed part. For example, in the above curing step, after the radiation curing is completed, the heating unit 3 can be controlled to increase the temperature inside the cavity 11 to 80 °C and heat for 5 minutes to perform in-cavity baking on the printed part, thereby finally completing the entire post-curing process.

[0137] As a specific embodiment of the present application, the post-curing process of the printed matter may include the following steps: nitrogen filling to form a low-oxygen environment - in-chamber heating - UV post-curing - in-chamber baking. After stopping baking, heat dissipation can be enhanced through the fan blade assembly and the cooling unit 5 to rapidly reduce the temperature of the post-curing equipment, facilitating subsequent operations by the operator.

[0138] In some other embodiments of the present application, the post-treatment method further includes the following steps: controlling the heating unit 3 to increase the temperature in the cavity 11 to a first temperature based on heating parameters; controlling the light source unit 2 to radiate light to the printed matter inside the cavity 11 based on radiation parameters.

[0139] Furthermore, the heating unit 3 can be controlled based on the heating parameters to perform re-heating to increase the temperature in the cavity 11 to a second temperature, where the second temperature is greater than the first temperature, and its process flow can be in-chamber heating - UV post-curing - in-chamber baking. For example, first control the heating unit 3 to increase the temperature in the cavity 11 to 40 °C, heat the printed matter at this temperature for 5 min, and then control the light source unit to perform radiation curing, such as curing under radiation parameters of a wavelength of 385 nm and a light intensity of 1000 W / m 2 After the radiation curing is completed, then control the heating unit 3 to increase the temperature in the cavity 11 to 80 °C and heat for 5 min to complete the entire post-curing process.

[0140] Heating before the light source unit 2 emits light for radiation can accelerate the volatilization of the cleaning solvent carried on the printed matter after cleaning the printed matter, so as not to be affected by the volatilization of the cleaning solvent during the subsequent light curing process, and the structure can be made more stable. Heating after the light source radiation curing can eliminate the internal stress generated after light curing (subsequent internal stress release will cause warping), so that the subsequent printed matter is not prone to warping deformation.

[0141] In addition, for some resin materials (such as single-component materials), the resin material has been cured and formed during the 3D printing process, that is, the printed matter, but the degree of curing may not yet reach the expectation. At this time, post-treatment is required, that is, the printed matter is subjected to light curing again. Heating at this time promotes the reaction efficiency of light curing and / or the degree of curing reaction.

[0142] For some resin materials (such as dual-component, multi-component and other dual-curing materials), only some components are cured and formed during the 3D printing process, but some components will not be cured due to light source radiation. Heating during the post-treatment process will cause the uncured part to thermally cure and further undergo thermosetting crosslinking to form a composite network structure, such as a crosslinked network structure, thereby improving the mechanical properties such as strength and elasticity of the printed matter.

[0143] In some embodiments of the present application, the post-processing method further includes the following steps: controlling the light source unit 2 to emit light at a preset time interval based on radiation parameters, irradiating the printed part in a flash exposure manner, irradiating the printed part with a high-intensity light source (such as ultraviolet light) in extremely short pulses, causing the photosensitive resin in the printed part to undergo a polymerization reaction, achieving instant curing, significantly shortening the time required for traditional curing, reducing energy consumption, being applicable to scenarios requiring rapid production, and significantly improving the overall efficiency.

[0144] In addition, irradiating the printed part in a flash exposure manner can also ensure uniform curing of each part of the resin, and can reduce defects caused by uneven light irradiation. Flash exposure curing can enhance the strength, hardness, and wear resistance of the printed part. Flash exposure makes the curing of the printed part more thorough, improving the chemical resistance and environmental stability of the material. The surface of the printed part after flash exposure curing is smoother, reducing the need for subsequent processing such as grinding and polishing, reducing the post-processing workload, and saving time and costs. The flash exposure curing time is short, and the energy consumption is lower than that of traditional methods; the curing efficiency is high, reducing material waste, and being more energy-saving and environmentally friendly.

[0145] It should be noted that the preset time interval of the flash exposure process can be periodic or non-periodic. For example, it emits light once every 2 seconds. For example, it stays for 2 seconds after emitting light, then goes out and stops for 0.5 seconds, and then emits light again. Such periodic light emission can save energy. It can also be non-periodic. For example, it emits light for 2 seconds first, goes out for 1 second, and then emits light for 4 seconds, etc. All can achieve the purpose of the present application.

[0146] Please refer to Figures 1 to 9 , the fourth aspect of the embodiments of the present application provides a manufacturing method for manufacturing a 3D printed part, including the post-processing method described in the above embodiments. The material for manufacturing the 3D printed part can be a photocurable material and / or a thermosetting material, and the printed part can be an engineering model, a figurine, a human body prosthesis (including dental implants, orthopedic implants, etc.).

[0147] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used in the text may also include the plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described in the text are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0148] Although terms such as first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used in this document. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0149] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A post-curing device, characterized in that, Comprising: A curing chamber (1), the curing chamber (1) having a cavity (11) for accommodating a printed part; A light source unit (2), the light source unit (2) being configured to radiate light to the printed part inside the cavity (11); A heating unit (3), the heating unit (3) being configured to raise the temperature inside the cavity (11).

2. The post-curing device according to claim 1, wherein Further comprising: A fluid supply unit (4), the fluid supply unit (4) being configured to introduce a target fluid into the cavity (11); The target fluid includes a gaseous fluid or a liquid fluid.

3. The post-curing device according to claim 2, wherein The gaseous fluid includes an inert gas and / or a low-oxygen gas.

4. The post-curing device according to claim 3, characterized in that, The nitrogen content in the low-oxygen gas is 80%-95%; Alternatively, the oxygen content in the low-oxygen gas is 3%-15%.

5. The post-curing device according to claim 2, wherein The liquid fluid includes water or an organic solvent.

6. The post-curing device according to claim 5, characterized in that The organic solvent includes at least one of an alcohol solvent, a silicone oil solvent, or a paraffin solvent.

7. The post-curing device according to any one of claims 2 to 6, characterized in that, The fluid supply unit (4) includes an input pipeline (41) and an output pipeline (42) communicating with the cavity (11).

8. The post-curing device according to any one of claims 1 to 6, characterized in that, The curing chamber (1) includes a chamber body (12) and a chamber door (13), the chamber door (13) being movably provided on the chamber body (12); a seal (14) is provided on the chamber door (13) and / or the chamber body (12).

9. The post-curing device according to claim 8, characterized in that, The material of the seal (14) is a foaming material.

10. The post-curing device according to claim 8, characterized in that, The material of the chamber body (12) of the curing chamber (1) is a transparent material, and the light source unit (2) is provided outside the curing chamber (1).

11. The post-curing device according to any one of claims 1 to 6, characterized in that, The light source unit (2) includes a first light-emitting element (21) and a second light-emitting element (22), and the wavelength band of the light emitted by the first light-emitting element (21) is different from the wavelength band of the light emitted by the second light-emitting element (22).

12. The post-curing device according to any one of claims 1 to 6, characterized in that, The heating unit (3) includes a heating element (31), and the heating element (31) includes at least one of a resistance heating element, an induction heating element, an arc heating element, or a dielectric heating element.

13. The post-curing device according to claim 12, wherein The heating unit (3) further includes a heat diffusion assembly (32) correspondingly provided with the heating element (31), and the heat diffusion assembly (32) is configured to promote the heat generated by the heating element (31) to be transferred from a first region (114) inside the cavity (11) to a second region (115) inside the cavity (11), the average temperature of the first region (114) being higher than the average temperature of the second region (115), and the printed part being disposed in the second region (115).

14. The post-curing device according to claim 13, wherein The cavity (11) has a first side (111) and a second side (112) disposed opposite to each other, and the heat diffusion assembly (32) is configured to drive the air flow at the heating element (31) to flow from the first side (111) to the second side (112).

15. The post-curing device according to claim 13, characterized in that, The cavity (11) has a first side (111) and a second side (112) which are oppositely arranged, and a third side (113) adjacent to the first side (111) and the second side (112) respectively. The heat diffusion component (32) is configured to drive the air flow at the heating element (31) to flow from the first side (111) to the third side (113), and then from the third side (113) to the second side (112).

16. The post-curing device according to claim 13, wherein The heat diffusion component (32) is further configured to: after the heating element (31) stops heating, start the heat diffusion component (32) to reduce the temperature in the cavity (11).

17. The post-curing device according to any one of claims 1 to 6, characterized in that, It further includes a cooling unit (5), and the cooling unit (5) is used to cool the curing chamber (1) and / or the light source unit (2).

18. The post-curing device according to any one of claims 1 to 6, characterized in that, It further includes a control unit (6), and the control unit (6) is respectively in signal connection with the light source unit (2) and the heating unit (3).

19. A 3D printing system, characterized in that, It includes the post-curing device according to any one of claims 1 to 18, and further includes: A three-dimensional printing device (8), and the three-dimensional printing device (8) is used to prepare the printed part.

20. A post-processing method, characterized in that, The post-curing device according to any one of claims 1 to 18 is adopted; Or, the 3D printing system according to claim 19 is adopted.

21. The post-treatment method according to claim 20, wherein It includes the following steps: Obtain the material information of the printed part; Obtain the product information of the printed part; Determine a set of process parameter information for post-processing based on the material information and the product information; The set of process parameter information includes at least one of radiation parameters, heating parameters, and fluid supply parameters.

22. The post-treatment method according to claim 21, characterized in that, The material information includes at least one of material component information, material property information, and material application information; and / or The product information includes at least one of product surface performance information, product surface dimension information, product mechanical property information, product color requirement information, and product safety requirement information; and / or The radiation parameters include at least one of light intensity parameters, radiation duration parameters, radiation interval parameters, and wavelength parameters; and / or The heating parameters include at least one of heating temperature parameters, heating duration parameters, and heating interval parameters; and / or The fluid supply parameters include at least one of target fluid type parameters, supply amount parameters, concentration parameters, input rate, and output rate.

23. The post-treatment method according to claim 21 or 22, characterized in that, It further includes the following steps: Control the fluid supply unit (4) to supply a target fluid into the cavity (11) based on the fluid supply parameters; Control the heating unit (3) to increase the temperature in the cavity (11) to a first temperature based on the heating parameters; Control the light source unit (2) to radiate light to the printed part inside the cavity (11) based on the radiation parameters.

24. The post-treatment method according to claim 23, wherein It further includes the following steps: Control the heating unit (3) to perform re-heating based on the heating parameters to increase the temperature in the cavity (11) to a second temperature, and the second temperature is greater than the first temperature.

25. The post-treatment method according to claim 21 or 22, characterized in that, It further includes the following steps: Control the heating unit (3) to increase the temperature in the cavity (11) to a first temperature based on the heating parameters; Control the light source unit (2) to radiate light towards the printed matter inside the cavity (11) based on the radiation parameter.

26. The post-treatment method according to claim 25, characterized in that, It further includes the following steps: Control the heating unit (3) to perform reheating based on the heating parameter, so as to increase the temperature in the cavity (11) to a second temperature, and the second temperature is greater than the first temperature.

27. The post-treatment method according to claim 21 or 22, characterized in that, It further includes the following steps: Control the light source unit (2) to radiate light at a preset time interval based on the radiation parameter.

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