Integrated 3D printing equipment and process capable of eliminating step lines

Abstract

The invention provides integrated 3D printing equipment and technology capable of eliminating step lines, and belongs to the technical field of 3D printing equipment. The problems of uneven spraying, low efficiency and the like due to the fact that step lines are eliminated manually in the prior art are solved. An upper bin and a lower bin which are arranged up and down are arranged in a machine box, and a workbench and a lifting mechanism used for driving the workbench to vertically ascend and descend are further arranged in the machine box; a printing device is arranged in the upper bin and used for printing workpieces, and a spraying and curing device is arranged in the lower bin and used for spraying and curing the printed workpieces. The method has the advantages that after printing is completed, the step pattern post-treatment process can be automatically carried out, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing equipment technology, and in particular to an integrated 3D printing equipment and process that can eliminate step marks. Background Technology

[0002] Fused deposition modeling (FDM) is a widely used 3D printing technology. FDM raw materials are generally thermoplastic materials such as wax, ABS, and nylon. The material is fed in filament form, heated and melted within a nozzle. The nozzle moves along the cross-sectional contour and infill path of the part, extruding the molten material. The material then rapidly solidifies and bonds with the surrounding material. Due to its layered fused deposition characteristic, material is stacked layer by layer to form the part, which can result in step-like textures that affect the surface quality and appearance of the parts.

[0003] Currently, common methods to eliminate step marks include manual sanding, spraying epoxy resin and heating for curing, and spraying UV varnish and curing with ultraviolet light. The latter two methods, which involve filling the step marks with spray paint, are the most frequently used. The current common process involves removing the part after 3D printing, manually spraying it with a spray gun, and then curing it with a hot air gun or by hand-held ultraviolet light. Because the entire process is done manually, the following problems exist: 1. It is difficult to guarantee the uniformity of spraying, which affects the consistency of surface quality; 2. The curing process is affected by human factors, which can easily lead to uneven curing; 3. Manual operation is inefficient and makes it difficult to achieve automated continuous production; 4. The process is dispersed, occupies a large space, and poses a risk of cross-contamination of materials. Summary of the Invention

[0004] The first objective of this invention is to address the shortcomings of existing technologies by providing a 3D printing device that integrates printing and post-processing and automates the elimination of step marks.

[0005] The first objective of this invention can be achieved through the following technical solutions: An integrated 3D printing device capable of eliminating step marks includes a chassis with an upper chamber and a lower chamber arranged vertically inside the chassis. The chassis also includes a worktable and a lifting mechanism for driving the worktable to move vertically. A printing device is installed in the upper chamber for printing workpieces, and a spraying and curing device is installed in the lower chamber for spraying and curing the printed workpieces. The chassis also includes a retractable partition for isolating or connecting the upper and lower chambers.

[0006] In the aforementioned integrated 3D printing equipment capable of eliminating step patterns, the partition includes a curtain, rollers, and motors. Two rollers are arranged in parallel and spaced apart, and the two ends of the curtain are fixedly connected to the two rollers respectively. The output shafts of the two motors are coaxially fixedly connected to the two rollers to drive them to rotate synchronously, and the two rollers rotate in opposite directions. The curtain is divided into a hollow section and a complete section along its length. When the hollow section is located between the upper and lower chambers, it allows passage up and down the worktable. When the complete section is located between the upper and lower chambers, it can be used to isolate the upper and lower chambers.

[0007] In the aforementioned integrated 3D printing equipment that can eliminate step marks, the worktable is mounted on a lifting mechanism via a base. The worktable is vertically rotatably mounted on the base, and a rotary motor is also provided on the base to drive the worktable to rotate.

[0008] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, the lifting mechanism includes a lead screw, a nut, and a second motor. The lead screw is vertically rotatably mounted on the machine housing, the nut is sleeved on the lead screw and fixedly connected to the base, and the output shaft of the second motor is fixedly connected to the lead screw to drive the lead screw to rotate and drive the nut, the base, and the worktable to rise and fall vertically.

[0009] In the aforementioned integrated 3D printing equipment that can eliminate step marks, the lifting mechanism further includes guide rods and guide seats. The two guide rods are respectively located on both sides of the lead screw and are fixedly connected to the machine housing. The guide seat is sleeved outside the guide rods and fixedly connected to the base. When the base is raised or lowered, the guide seat is raised or lowered synchronously along the guide rods.

[0010] In the aforementioned integrated 3D printing equipment that can eliminate step marks, a heating device is also provided on the worktable for heating the worktable.

[0011] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, the spraying and curing device includes several spraying arms, each spraying arm being equipped with several nozzles; the spraying arms are divided into UV varnish spraying arms and epoxy resin spraying arms, which are used for spraying UV varnish and epoxy resin respectively.

[0012] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, a UV lamp is installed at the top of the lower chamber for UV varnish curing. In the aforementioned integrated 3D printing equipment that can eliminate step marks, a heating pipe is provided at the bottom of the lower chamber for heating and curing epoxy resin.

[0013] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, two air circulation fans are located in the center of the lower chamber, arranged in opposite directions to form a ring-shaped air duct inside the lower chamber. The rotation direction of this ring-shaped air duct is opposite to the rotation direction of the worktable. This forces hot air to circulate in the opposite direction to the rotation of the worktable, greatly enhancing heat exchange and convection between the workpiece surface and the hot air. This ensures uniform and rapid curing of the epoxy resin and prevents workpiece deformation due to localized overheating.

[0014] In the aforementioned integrated 3D printing equipment that can eliminate step marks, the bottom of the lower chamber is equipped with an exhaust fan for ventilation and cooling.

[0015] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, the worktable is equipped with two temperature sensors, which are used to monitor the worktable temperature and the lower chamber temperature, respectively.

[0016] In the aforementioned integrated 3D printing device capable of eliminating step marks, the printing device includes a printing nozzle and a translation drive mechanism for driving the printing nozzle to translate. The translation drive mechanism includes mutually perpendicular X-axis and Y-axis. The printing nozzle is sleeved on the X-axis and Y-axis and can translate along the X-axis and Y-axis respectively. The two ends of the X-axis and Y-axis are slidably mounted on the chassis via slide rails. The translation drive mechanism also includes an X-axis drive component and a Y-axis drive component, which are used to drive the X-axis to translate along the Y-axis and drive the Y-axis to translate along the X-axis, respectively.

[0017] In the aforementioned integrated 3D printing device that can eliminate step marks, the slide rail includes a slider and mutually perpendicular X-axis guide rods and Y-axis guide rods. The two ends of the X-axis are respectively slidably mounted on the two Y-axis guide rods via the slider, and the two ends of the Y-axis are respectively slidably mounted on the two X-axis guide rods via the slider.

[0018] In the aforementioned integrated 3D printing equipment capable of eliminating step marks, both the X-axis drive component and the Y-axis drive component include a drive wheel, a driven wheel, a third motor, a first belt, and a second belt. The drive wheel is coaxially and fixedly connected to the output shaft of the third motor. Several driven wheels are coaxially and fixedly connected to the X-axis guide rod and the Y-axis guide rod, respectively. The first belt is closed and wound around the drive wheel and the driven wheel. The two third motors drive the X-axis guide rod and the Y-axis guide rod to rotate, respectively. The second belt is closed and wound around the driven wheels on the two X-axis guide rods to make the two X-axis guide rods rotate synchronously. The second belt is fixedly connected to the slider on the Y-axis guide rod to drive the X-axis to translate. The other second belt is closed and wound around the driven wheels on the two Y-axis guide rods to make the two Y-axis guide rods rotate synchronously. The second belt is fixedly connected to the slider on the X-axis guide rod to drive the Y-axis to translate.

[0019] In the aforementioned integrated 3D printing equipment capable of eliminating step patterns, the chassis has an upper chamber door corresponding to the position of the upper chamber.

[0020] The second objective of this invention is to address the shortcomings of existing technologies by providing a printing process that enables automatic printing and eliminates step marks.

[0021] The second objective of this invention can be achieved through the following technical solutions: An integrated 3D printing process capable of eliminating step marks, wherein the process is carried out using the aforementioned integrated 3D printing equipment capable of eliminating step marks, characterized by comprising the following steps: S1: Perform FDM printing in the upper chamber to generate the workpiece; S2: The worktable lowers the workpiece to the lower chamber; S3: The motor drives the reel to rotate, so that the complete section is located between the upper and lower compartments, which is used to isolate the upper and lower compartments; S4: The rotary motor drives the worktable to rotate; S5: Depending on the characteristics of the workpiece, you can choose to spray UV varnish or epoxy resin. When choosing to apply UV varnish: Step a: Open the nozzle on the UV varnish spray arm and spray UV varnish evenly onto the rotating workpiece; Step b: After spraying is complete, turn off the nozzle, and the worktable continues to rotate the workpiece; Step c: Turn on the UV lamp and irradiate the workpiece to cure the UV varnish on the workpiece; Step d: After the irradiation time is reached, turn off the UV lamp and the worktable stops rotating; Step e: Motor 1 drives the roller to rotate in the opposite direction, so that the hollow section is located between the upper and lower chambers, and the worktable rises to the upper chamber; Step f: Open the upper compartment door and remove the workpiece; When choosing to spray epoxy resin: Step a: Open the nozzle on the epoxy resin spraying arm and spray epoxy resin evenly onto the rotating workpiece. Step b: After spraying is complete, turn off the nozzle, and the worktable continues to rotate the workpiece; Step c: Turn on the heating element to heat the air in the lower chamber to reach the curing temperature; Step d: Turn on the air circulator fan; Step e: After the curing time is reached, turn off the heating element and turn on the ventilation fan; Step f: After the cooling time is reached, turn off the ventilation fan and air circulation fan, and the worktable will stop rotating; Step g: Motor 1 drives the roller to rotate in the opposite direction, so that the hollow section is located between the upper and lower chambers, and the worktable rises to the upper chamber; Step h: Open the upper compartment door and remove the workpiece.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. After printing, the process can be automated to enter the step pattern post-processing process, improving production efficiency; 2. The upper chamber for 3D printing and the lower chamber for spray curing are separated by a curtain. The two chambers remain relatively independent during operation to avoid cross-contamination and mutual interference. 3. The lower chamber can complete the fully automatic spraying process of parts. By setting up a spraying arm with several atomizing nozzles, it can achieve atomized spraying of UV varnish or epoxy resin. With the rotation of the worktable, it can achieve uniform spraying of the workpiece. 4. The chamber is equipped with two curing systems: UV irradiation and hot air drying. Based on the characteristics of their different drying processes, the UV tube is located in the upper corner of the lower chamber so that the emitted ultraviolet light can cover more of the chamber volume. Combined with the rotation of the worktable, it achieves UV irradiation of the workpiece without dead angles. The hot air drying uses heating pipes located at the bottom of the lower chamber to heat the air. Since the hot air has a low density, it will automatically rise and form a convection circulation with the cold air above. Combined with the forward and reverse air circulation fans, it ensures the internal air circulation. Combined with the worktable rotating in the opposite direction to the air flow, it ensures that the epoxy resin on the surface of the workpiece can be cured quickly. 5. In addition to eliminating step marks, the lower chamber can also be used for coloring and spraying paint, making it a multi-purpose machine that meets different needs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the printing device of the present invention; Figure 2 This is a schematic diagram showing the workbench of the present invention located in the upper compartment. Figure 3 This is a schematic diagram showing the workbench of the present invention located in the lower compartment. Figure 4 This is an enlarged schematic diagram of the lower compartment structure of the present invention; Figure 5 This is a schematic diagram of the printing device of the present invention; In the diagram: 1. Chassis; 2. Upper chamber; 3. Lower chamber; 4. Workbench; 5. Curtain; 6. Roller; 7. Motor 1; 8. Base; 9. Rotary motor; 10. Lead screw; 11. Nozzle; 12. Motor 2; 13. Guide rod; 14. Guide seat; 15. UV varnish spraying arm; 16. Epoxy resin spraying arm; 17. UV lamp; 18. Heating element; 19. Air circulator fan; 20. Ventilation fan; 21. Printer head; 22. X-axis; 23. Y-axis; 24. X-guide rod; 25. Y-guide rod; 26. Drive wheel; 27. Driven wheel; 28. Motor 3; 29. ​​Belt 1; 30. Belt 2; 31. Slider. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] like Figures 1 to 3 As shown, the integrated 3D printing equipment for eliminating step marks according to the present invention includes a chassis 1, which is divided into an upper chamber 2 and a lower chamber 3. An upper chamber door is provided on the front wall of the upper chamber 2 for loading and unloading workpieces. A worktable 4 is provided inside the chassis 1 for supporting and fixing the workpieces.

[0026] like Figure 2 and Figure 3 As shown, the worktable 4 is mounted on the lifting mechanism via a base 8. Specifically, the lifting mechanism includes a vertically arranged lead screw 10, a nut that cooperates with the lead screw 10, and a second motor 12 that drives the lead screw 10 to rotate. The upper end of the lead screw 10 is fixed to the top of the housing 1 via a bearing seat. The nut is fixedly connected to the base 8. To ensure the stability of the lifting process, two guide rods 13 are symmetrically arranged on both sides of the lead screw 10, and each guide rod 13 is fitted with a slidable guide seat 14, which is also fixedly connected to the base 8. When the second motor 12 drives the lead screw 10 to rotate, the nut drives the base 8 and the worktable 4 to perform precise vertical lifting movements along the guide rods 13.

[0027] The worktable 4 is vertically and rotatably connected to the base 8. A rotary motor 9 is installed inside the base 8, its output shaft connected to the central axis of the worktable 4, driving the worktable 4 to rotate around its vertical central axis. A heating device, such as an electric heating plate or heating tube 18, is embedded in the surface of the worktable 4 for preheating or maintaining the temperature of the workpiece bottom during printing or post-processing. A temperature sensor is installed on the worktable 4 for real-time monitoring of the surface temperature.

[0028] The separator is used to selectively isolate the upper compartment 2 and the lower compartment 3. A preferred embodiment includes two parallel and horizontally arranged rollers 6, rotatably mounted on both sides of the opening of the fixed partition. A roll of curtain fabric 5 is fixed at both ends and wound around these two rollers 6. The output shafts of two motors 7 are coaxially fixed to the two rollers 6. The curtain fabric 5 is divided into a perforated section and a complete section along its length. When the motors 7 drive the two rollers 6 to rotate synchronously in opposite directions, the curtain fabric 5 can be controlled to translate, so that the perforated section or the complete section is precisely located at the passageway between the upper compartment 2 and the lower compartment 3. Figure 2 As shown, when the hollowed-out section is located at the channel opening, its through-hole allows the worktable 4 and the workpiece to pass freely; as Figure 3 As shown, when the complete section is located at the entrance of the passage, it forms a physical barrier that effectively isolates the upper compartment 2 from the lower compartment 3.

[0029] like Figure 5 As shown, the printing device is located in the upper chamber 2. It includes a printing nozzle 21 for extruding molten material and a translational drive mechanism for driving the printing nozzle 21 to move in the horizontal plane (XY plane). The translational drive mechanism includes two parallel X-axis guide rods 24 and two parallel Y-axis guide rods 25, which are perpendicular to each other and connected to the chassis frame via sliders 31 and guide rail structures. The two ends of the X-axis 22 are slidably mounted on the two Y-axis guide rods 25 via sliders 31; the two ends of the Y-axis 23 are slidably mounted on the two X-axis guide rods 24 via sliders 31. The printing nozzle 21 is mounted at the intersection of the X-axis 22 and the Y-axis 23. The drive system includes two sets of motors 28, a drive pulley 26, a driven pulley 27, a first belt 29, and a second belt 30. One set of motors 28 drives two X-axis guide rods 24 to rotate synchronously via belt 29. This, in turn, pulls the slider 31 on the Y-axis guide rod 25 via a closed belt 30 wound around the driven wheel of the X-axis guide rod 24, thus moving the print head 21 in the X direction. The other set works similarly to move the print head 21 in the Y direction.

[0030] like Figure 4 As shown, the spray curing device is integrated into the lower chamber 3, and includes: Spraying system: At least two independent spraying arms are provided, namely a UV varnish spraying arm 15 and an epoxy resin spraying arm 16. Each spraying arm has multiple atomizing nozzles 11 arranged in an array along its length. The spraying arms are connected to corresponding material tanks and precision fluid pumps via pipelines.

[0031] Curing system: includes a UV curing unit and a thermal curing unit. The UV curing unit consists of UV lamps 17 installed at the top of the lower chamber 3, whose radiation range should cover the area traversed by the workpiece when the worktable rotates. The thermal curing unit consists of heating pipes 18 installed at the bottom of the lower chamber 3, used to heat the air inside the chamber.

[0032] Air circulation and temperature control system: Two air circulation fans 19 rotating in opposite directions are installed on the middle side wall of the lower chamber 3. Working together, they create a horizontal, uniform, annular airflow within the lower chamber 3. An exhaust fan 20 is also installed at the bottom of the lower chamber 3 to exchange air with the outside environment for rapid cooling. In addition, a temperature sensor is installed inside the lower chamber 3 to monitor the ambient temperature. All heating, air supply, and exhaust units are electrically connected to the equipment's control system.

[0033] The present invention discloses an integrated 3D printing process for eliminating step marks. This process uses the aforementioned integrated 3D printing equipment for eliminating step marks and includes the following steps: S1, FDM printing stage Close the upper chamber door to ensure the upper chamber 2 is sealed. The lifting mechanism raises the worktable 4 to a suitable starting height for printing. The printing device performs FDM printing layer by layer on the worktable 4 according to the preset model slicing data to generate a three-dimensional workpiece. During the printing process, the heating device of the worktable 4 can be selectively turned on to improve the adhesion of the first layer and reduce workpiece warping.

[0034] S2, Workpiece Transfer Stage After printing is complete, the print head 21 returns to its parking position. Motor 7 of the separator starts, driving the roller 6 to rotate, moving the perforated section of the curtain 5 to the passageway between the upper chamber 2 and the lower chamber 3, making way for the descent of the worktable 4. The lifting mechanism starts, and motor 12 drives the lead screw 10 to rotate, allowing the worktable 4 to smoothly descend carrying the printed workpiece. The worktable 4 passes through the perforated section and finally descends to the preset spraying / curing station in the lower chamber 3.

[0035] S3, Warehouse Isolation Phase After the workbench 4 is in place, the motor 7 rotates in the opposite direction, driving the curtain 5 to move horizontally, so that the entire section moves and closes the passage opening, thereby completely isolating the upper chamber 2 and the lower chamber 3.

[0036] S4. Post-processing preparation stage The rotary motor 9 in the lower chamber 3 starts, driving the worktable 4 and the workpiece to begin rotating at a constant speed.

[0037] S5, Spraying and Curing Stage Based on the material properties of the workpiece, the control system can select one of the following two post-processing paths: Process Path A: UV varnish spraying and curing Open the nozzle 11 on the UV varnish spraying arm 15 to evenly spray atomized UV varnish onto the rotating workpiece surface. The spraying time and flow rate are controlled by the program. After spraying, close the nozzle 11, and the worktable 4 continues to rotate. Turn on the UV lamp 17 to irradiate the rotating workpiece with ultraviolet light from all directions. The ultraviolet light excites the photoinitiator in the varnish, causing the coating to rapidly cross-link and cure. After the preset irradiation time is reached, turn off the UV lamp 17, and the worktable 4 stops rotating. Then, control the separator to realign the hollow section with the channel opening, and the lifting mechanism raises the worktable 4 back to the upper chamber 3. Open the upper chamber door and remove the workpiece.

[0038] Process Path B: Epoxy Resin Spraying and Thermosetting Open the nozzle 11 on the epoxy resin spraying arm 16 to evenly spray atomized epoxy resin mixture onto the rotating workpiece surface. The spraying time and flow rate are controlled by the program. After spraying, close the nozzle 11, and the worktable 4 continues to rotate. Turn on the heating pipe 18 to heat the air in the lower chamber 3. The temperature sensor provides real-time feedback on the temperature inside the chamber. When the temperature is too high, turn off the heating pipe 18 to prevent workpiece deformation. Turn on the heating pipe 18 again after the temperature drops. At the same time, turn on the two counter-rotating air circulation fans 19. After the preset curing time is reached, turn off the heating pipe 18 and turn on the ventilation fan 20 to expel the hot air from the chamber and draw in cold outside air to actively cool the workpiece. When the temperature sensor shows that the temperature has dropped to a safe range, turn off the ventilation fan 20 and the air circulation fan 19, and the worktable 4 stops rotating. Then, control the separator to realign the hollow section with the channel opening, and the lifting mechanism lifts the worktable 4 back to the upper chamber 2. Open the upper chamber door and remove the workpiece.

[0039] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An integrated 3D printing device capable of eliminating step marks, comprising a chassis (1), wherein the chassis (1) is provided with an upper chamber (2) and a lower chamber (3) arranged vertically, and the chassis (1) is also provided with a worktable (4) and a lifting mechanism for driving the worktable (4) to move vertically up and down; the upper chamber (2) is provided with a printing device for printing workpieces, and the lower chamber (3) is provided with a spraying and curing device for spraying and curing the printed workpieces; the chassis (1) is also provided with a retractable partition for isolating or connecting the upper chamber (2) and the lower chamber (3).

2. The integrated 3D printing equipment capable of eliminating step patterns according to claim 1, characterized in that, The separator includes a curtain (5), a roller (6), and a motor (7). The two rollers (6) are arranged in parallel and spaced apart. The two ends of the curtain (5) are fixedly connected to the two rollers (6) respectively. The output shafts of the two motors (7) are fixedly connected to the two rollers (6) coaxially to drive the two rollers (6) to rotate synchronously, and the two rollers (6) rotate in opposite directions. The curtain (5) is divided into a hollow section and a complete section along its length. When the hollow section is located between the upper chamber (2) and the lower chamber (3), the workbench (4) can pass through vertically. When the complete section is located between the upper chamber (2) and the lower chamber (3), it can be used to isolate the upper chamber (2) and the lower chamber (3).

3. The integrated 3D printing equipment capable of eliminating step patterns according to claim 1, characterized in that, The worktable (4) is mounted on the lifting mechanism via a base (8). The worktable (4) is vertically rotatable on the base (8). A rotary motor (9) is also mounted on the base (8) to drive the worktable (4) to rotate. The lifting mechanism includes a lead screw (10), a nut, and a second motor (12). The lead screw (10) is vertically rotatable on the housing (1). The nut is fitted onto the lead screw (10) and fixedly connected to the base (8). The output shaft of the second motor (12) is connected to the lead screw. The rod (10) is fixedly connected and used to drive the lead screw (10) to rotate and drive the nut, base (8) and worktable (4) to rise and fall vertically; the lifting mechanism also includes a guide rod (13) and a guide seat (14). The two guide rods (13) are respectively located on both sides of the lead screw (10) and fixedly connected to the machine box (1). The guide seat (14) is sleeved on the outside of the guide rod (13) and fixedly connected to the base (8). When the base (8) rises and falls, the guide seat (14) rises and falls synchronously along the guide rod (13).

4. The integrated 3D printing equipment for eliminating step patterns according to claim 1, characterized in that, The spray curing device includes several spray arms, each of which is equipped with several nozzles (11); the spray arms are divided into a UV varnish spray arm (15) and an epoxy resin spray arm (16), which are used to spray UV varnish and epoxy resin respectively.

5. The integrated 3D printing equipment for eliminating step patterns according to claim 1, characterized in that, The lower chamber (3) is equipped with a UV lamp tube (17) at the top; a heating tube (18) is provided at the bottom of the lower chamber (3); two air circulation fans (19) are provided in the middle of the lower chamber (3), and the two air circulation fans (19) are arranged in opposite directions to form a ring-shaped air duct inside the lower chamber (3), and the rotation direction of the ring-shaped air duct is opposite to the rotation direction of the workbench (4); a ventilation fan (20) is provided at the bottom of the lower chamber (3) for ventilation and cooling.

6. The integrated 3D printing equipment capable of eliminating step patterns according to claim 1, characterized in that, The printing device includes a print head (21) and a translation drive mechanism for driving the print head (21) to translate. The translation drive mechanism includes an X-axis (22) and a Y-axis (23) that are perpendicular to each other. The print head (21) is sleeved on the X-axis (22) and the Y-axis (23) and can translate along the X and Y directions respectively. The two ends of the X-axis (22) and the Y-axis (23) are slidably mounted on the housing (1) by slide rails. The translation drive mechanism also includes an X-axis drive member and a Y-axis drive member, which are used to drive the X-axis (22) to translate along the Y direction and drive the Y-axis (23) to translate along the X direction respectively.

7. The integrated 3D printing equipment for eliminating step patterns according to claim 6, characterized in that, The slide rail includes a slider (31) and mutually perpendicular X-guide rods (24) and Y-guide rods (25). The two ends of the X-axis (22) are slidably mounted on the two Y-guide rods (25) via the slider (31), and the two ends of the Y-axis (23) are slidably mounted on the two X-guide rods (24) via the slider (31).

8. The integrated 3D printing equipment for eliminating step patterns according to claim 7, characterized in that, The X-axis drive and Y-axis drive both include a drive wheel (26), a driven wheel (27), a third motor (28), a first belt (29), and a second belt (30). The drive wheel (26) is coaxially fixed to the output shaft of the third motor (28), and several driven wheels (27) are coaxially fixed to the X-axis guide rod (24) and the Y-axis guide rod (25), respectively. The first belt (29) is closed and wound around the drive wheel (26) and the driven wheel (27). The two third motors (28) drive the X-axis guide rod (24) and the Y-axis guide rod (25) to rotate, respectively. A second belt (30) is closed and wound around the driven wheels (27) on the two X-guide rods (24) so ​​that the two X-guide rods (24) rotate synchronously. The second belt (30) is fixedly connected to the slider (31) on the Y-guide rod (25) to drive the X-axis (22) to translate. Another second belt (30) is closed and wound around the driven wheels (27) on the two Y-guide rods (25) so that the two Y-guide rods (25) rotate synchronously. The second belt (30) is fixedly connected to the slider (31) on the X-guide rod (24) to drive the Y-axis (23) to translate.

9. The integrated 3D printing equipment for eliminating step patterns according to claim 1, characterized in that, The chassis (1) has an upper compartment door corresponding to the position of the upper compartment (2).

10. An integrated 3D printing process capable of eliminating step patterns, wherein the process is performed using an integrated 3D printing device capable of eliminating step patterns as described in any one of claims 1-9, characterized in that, It includes the following steps: S1: Perform FDM printing in the upper chamber (2) to generate the workpiece; S2: The worktable (4) drives the workpiece to descend to the lower chamber (3); S3: Motor 1 (7) drives the reel (6) to rotate, so that the complete section is located between the upper chamber (2) and the lower chamber (3), which is used to isolate the upper chamber (2) and the lower chamber (3). S4: The rotary motor (9) drives the worktable (4) to rotate; S5: Depending on the characteristics of the workpiece, you can choose to spray UV varnish or epoxy resin. When choosing to apply UV varnish: Step a: Open the nozzle (11) on the UV varnish spraying arm (15) and spray UV varnish evenly onto the rotating workpiece; Step b: After the spraying is completed, close the nozzle (11), and the worktable (4) continues to rotate the workpiece; Step c: Turn on the UV lamp (17) to irradiate the workpiece and cure the UV varnish on the workpiece; Step d: After the irradiation time is reached, turn off the UV lamp (17) and the worktable (4) stops rotating; Step e: Motor 1 (7) drives the roller (6) to rotate in the opposite direction, so that the hollow section is located between the upper chamber (2) and the lower chamber (3), and the worktable (4) rises to the upper chamber (2). Step f: Open the upper compartment door and remove the workpiece; When choosing to spray epoxy resin: Step a: Open the nozzle (11) on the epoxy resin spraying arm (16) and spray epoxy resin evenly onto the rotating workpiece. Step b: After the spraying is completed, close the nozzle (11), and the worktable (4) continues to rotate the workpiece; Step c: Turn on the heating tube (18) to heat the air in the lower chamber (3) to reach the curing temperature; Step d: Turn on the air circulator fan (19); Step e: After the curing time is reached, turn off the heating element (18) and turn on the ventilation fan (20). Step f: After the cooling time is reached, turn off the ventilation fan (20) and the air circulation fan (19), and the workbench (4) stops rotating; Step g: Motor 1 (7) drives the roller (6) to rotate in the opposite direction, so that the hollow section is located between the upper chamber (2) and the lower chamber (3), and the worktable (4) rises to the upper chamber (2); Step h: Open the upper compartment door and remove the workpiece.

Images