A leveling roller device for a 3D wax jet printer

Abstract

The application discloses a leveling roller device for a 3D wax jet printer, wherein a leveling roller assembly, a residual wax scraping assembly, an adjusting assembly and a dust and smoke removing assembly are installed on a mounting frame; the leveling roller assembly comprises a leveling roller, a power device for driving the rotation of the leveling roller and a leveling roller temperature control system for controlling the temperature of the leveling roller; the scraping blade of the scraper blade of the residual wax scraping assembly is pressed on the peripheral surface of the leveling roller, the scraper blade can continuously scrape the residual wax material attached to the peripheral surface of the leveling roller, the residual wax material enters a residual wax recovery tank, and a residual wax recovery temperature control system keeps the wax material in the residual wax recovery tank in a liquid state; the adjusting assembly can adjust the up-and-down movement of the mounting frame relative to a mounting plate, so as to adjust the up-and-down position and the levelness of the leveling roller. The leveling roller device integrates heat pressing, leveling, residual wax scraping, residual wax recovery and smoke and dust removal, can realize fine control of the installation precision of the leveling roller, greatly improves the flatness and roughness of the surface of a wide wax film and guarantees the radial runout precision of the leveling roller at the working temperature.

Description

Technical Field

[0001] This invention relates to the field of 3D printing equipment technology, and in particular to a leveling roller device for a 3D wax spray printer. Background Technology

[0002] 3D wax spraying printing is a high-precision additive manufacturing technology that directly creates a one-time wax model for lost-wax casting (precision casting) by spraying molten wax droplets and depositing them layer by layer. 3D wax spraying printing includes a leveling roller device, but existing leveling roller devices in 3D wax spraying printers have the following significant drawbacks:

[0003] First, the surface precision of the leveling roller is insufficient, making it difficult to guarantee flatness and roughness requirements during the leveling of large-format wax films, resulting in uneven wax layer thickness. Second, the radial runout accuracy of the leveling roller is poor at operating temperatures, and thermal expansion or insufficient rigidity affects leveling consistency. Third, the existing adjustment mechanism has limited precision, unable to achieve micron-level gap control, making it difficult to meet the demands of high-precision printing. Furthermore, the existing equipment is functionally limited, only possessing rolling capabilities, lacking the ability to scrape and recover excess wax and handle fumes, leading to material waste, frequent equipment maintenance, and a poor working environment. These shortcomings collectively restrict the molding quality and production efficiency of 3D wax spray printing. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a leveling roller device for a 3D wax printer. The leveling roller device integrates hot pressing leveling, residual wax scraping, residual wax recovery and dust removal, and can achieve precise control of the installation accuracy of the leveling roller, improve the flatness and roughness of the surface of the wide wax film, and ensure the radial runout accuracy of the leveling roller at the working temperature.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A leveling roller device for a 3D wax printer is mounted on a mounting plate of the printer's lifting mechanism. The leveling roller device includes a mounting frame on which a leveling roller assembly, a wax scraping assembly, an adjusting assembly, and a dust and smoke removal assembly are mounted. The leveling roller assembly includes a leveling roller rotatably mounted on the mounting frame, a power device for driving the leveling roller's rotation, and a leveling roller temperature control system for controlling the leveling roller's temperature. The wax scraping assembly includes a scraper blade, a wax recovery tank, and a wax recovery temperature control system. The scraper blade's cutting edge presses against the circumferential surface of the leveling roller. When the leveling roller rotates, the scraper blade continuously removes excess wax adhering to the circumferential surface of the leveling roller. Excess wax is scraped off and enters the residual wax recovery tank. The residual wax recovery temperature control system keeps the wax in the residual wax recovery tank in a liquid state. The adjustment component includes a micrometer head, a micrometer head adjustment block, a bolt elongated hole locking structure, and a vertical guide hole for the micrometer head adjustment block to slide. The micrometer head adjustment block is fixedly connected to the mounting plate of the lifting mechanism. The vertical guide hole is opened on the mounting frame. The micrometer head adjustment block passes through and extends out of the vertical guide hole. The micrometer head is mounted on the mounting frame and its end abuts against the micrometer head adjustment block. When the bolt elongated hole locking structure is in the loosened state, rotating the micrometer head can drive the mounting frame to move up and down relative to the mounting plate of the lifting mechanism.

[0007] Preferably, the leveling roller is a hollow roller shaft made of high-strength alloy steel. The outer peripheral surface of the leveling roller is covered with a ceramic coating after ultra-precision grinding, and the outer peripheral surface of the covered ceramic coating is mirror-polished.

[0008] Preferably, the leveling roller temperature control system includes a first heating component, a first temperature sensor, and a first temperature control switch. The first heating component and the first temperature sensor are installed inside the leveling roller, and the first temperature control switch is installed on the mounting frame. The first heating component, the first temperature sensor, and the first temperature control switch are electrically connected to the control device.

[0009] Preferably, the residual wax scraping assembly includes a scraper mounting plate, the scraper blade is fixed on the scraper mounting plate, the scraper mounting plate is installed on the residual wax recovery tank through a bolt elongated hole locking structure, the mounting frame includes an upper mounting base, and L-shaped connecting plates are fixed to the two ends of the lower part of the upper mounting base, and the two ends of the residual wax recovery tank are fixedly connected to the L-shaped connecting plates respectively.

[0010] Preferably, the residual wax recovery temperature control system includes a second heating component, a second temperature sensor, and a second temperature control switch. The second heating component is installed below the residual wax recovery tank, and the second temperature sensor and the second temperature control switch are installed on the residual wax recovery tank. The second heating component, the second temperature sensor, and the second temperature control switch are electrically connected to the control device.

[0011] Preferably, the dust and smoke removal assembly includes a high-temperature resistant suction pipe, multiple suction pipe branches, a fixed bracket, an aerogel heat insulation plate, and a suction protective cover. The high-temperature resistant suction pipe is fixedly connected to the multiple spaced suction pipe branches. The high-temperature resistant suction pipe is fixedly connected to the upper mounting base through multiple fixed brackets. The aerogel heat insulation plate and the suction protective cover are located on the front and rear sides of the upper mounting base, respectively. The free end of the suction pipe branch and the leveling roller are located between the aerogel heat insulation plate and the suction protective cover. The free end of the suction pipe branch is located above the leveling roller.

[0012] Preferably, the scraper blade is made of ultra-high molecular weight polyethylene or wear-resistant stainless steel.

[0013] Preferably, the power unit includes a stepper motor and a pulley transmission mechanism, wherein the stepper motor drives the pulley transmission mechanism to drive the leveling roller to rotate.

[0014] Preferably, the upper mounting base includes a horizontal base plate, a back plate, and end mounting plates located at the left and right ends of the horizontal base plate. A reinforcing rib is provided between the back plate and the horizontal base plate. An L-shaped connecting plate is fixedly connected to the lower part of each end mounting plate. A bearing seat for mounting the end of the leveling roller is fixedly connected to the L-shaped connecting plate. A bearing is installed between the end of the leveling roller and the bearing seat.

[0015] Preferably, a micrometer head mounting plate is fixed to the top of the back plate, the micrometer head is mounted on the micrometer head mounting plate, and the bolt elongated hole locking structure and the vertical guide hole are located on the back plate.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] This invention relates to a leveling roller device for a 3D wax printer. The leveling roller device is mounted on a mounting plate of the printer's lifting mechanism. The device includes a mounting frame on which a leveling roller assembly, a wax scraping assembly, an adjusting assembly, and a dust and smoke removal assembly are installed. The leveling roller assembly can hot-press and level the surface of the printed wax model. The wax scraping assembly continuously scrapes away excess wax from the leveling roller and collects it into a wax recovery tank. The dust and smoke removal assembly treats the emitted fumes through a dust filter before discharge, significantly reducing harmful fumes. Therefore, this invention integrates hot-press leveling, wax scraping, wax recovery, and fume removal into a single unit.

[0018] The adjustment assembly includes a micrometer head, a micrometer head adjustment block, a bolt elongated hole locking structure, and a vertical guide hole for the micrometer head adjustment block to slide. The micrometer head adjustment block is fixedly connected to the mounting plate of the lifting mechanism. The vertical guide hole is opened on the mounting frame. The micrometer head adjustment block passes through and extends out of the vertical guide hole. The micrometer head is mounted on the mounting frame and its end abuts against the micrometer head adjustment block. When the bolt elongated hole locking structure is in the loosened state, rotating the micrometer head can drive the mounting frame to move up and down relative to the mounting plate of the lifting mechanism, that is, to move up and down along the vertical guide hole. In turn, the mounting frame drives the leveling roller to move up and down to adjust the vertical position and levelness of the leveling roller, thereby achieving precise control of the installation accuracy of the leveling roller.

[0019] The leveling roller is a hollow roller shaft made of high-strength alloy steel. Its outer circumference is ultra-precision ground and then coated with a ceramic layer, typically applied via plasma spraying. The outer circumference of the coated ceramic layer is then mirror-polished, achieving a radial runout of ±1μm. The ceramic coating thickness is maintained at ≥0.2mm with a uniformity tolerance of ±0.1mm, ensuring the radial runout accuracy of the leveling roller at operating temperatures. Furthermore, the adjustment component uses a micrometer head for height adjustment, with a fine-tuning accuracy of 0.0005mm, achieving micron-level leveling precision and improving the flatness and roughness of the wide wax film surface. The adjustment component precisely controls the final thickness and compaction of the wax layer by adjusting the gap between the lower surface of the leveling roller and the printhead surface.

[0020] In summary, the leveling roller device for 3D wax printers of the present invention integrates hot pressing leveling, residual wax scraping, residual wax recovery and dust removal, and can achieve precise control of the leveling roller installation accuracy, improve the flatness and roughness of the surface of the large-format wax film, and ensure the radial runout accuracy of the leveling roller at the working temperature. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the leveling roller device for a 3D wax printer according to the present invention.

[0022] Figure 2This is a side view schematic diagram of the leveling roller device for a 3D wax printer according to the present invention;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the leveling roller device (with air inlet installed) for a 3D wax printer according to the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the leveling roller device for a 3D wax printer of the present invention mounted on the mounting plate of the lifting mechanism.

[0025] Figure 5 yes Figure 4 Schematic diagram of the cross section at point AA;

[0026] Figure 6 yes Figure 1 An exploded view of the leveling roller device in a 3D wax spray printer.

[0027] Figure 7 This is a schematic diagram of the leveling roller assembly;

[0028] Figure 8 This is a schematic diagram of the residual wax scraping component;

[0029] In the diagram: 1. Leveling roller assembly; 11. Leveling roller; 12. Stepper motor; 13. Drive pulley; 14. Driven pulley; 15. Transmission belt; 121. First heating assembly; 122. First temperature sensor; 123. First temperature control switch; 2. Residual wax scraping assembly; 21. Scraper blade; 22. Residual wax recovery tank; 23. Scraper mounting plate; 24. Second heating assembly; 25. Second temperature sensor; 26. Second temperature control switch; 27. Heating rod mounting plate; 3. Adjustment assembly; 31 32. Micrometer head; 34. Micrometer head adjustment block; 35. Vertical guide hole; 46. Bolt elongated hole locking structure; 47. Horizontal base plate; 48. Upper mounting base; 49. L-shaped connecting plate; 40. Back plate; 41. Reinforcing rib plate; 42. Bearing seat; 43. Bearing; 44. End mounting plate; 5. Mounting plate; 65. Dust and smoke removal assembly; 66. High temperature resistant dust suction pipe; 67. Dust suction pipe branch pipe; 68. Fixed bracket; 69. Aerogel heat insulation board; 60. Dust suction protective cover. Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the appended claims.

[0031] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] like Figures 1 to 5 As shown, a leveling roller device for a 3D wax printer is installed on the mounting plate 5 of the lifting mechanism of the 3D wax printer. The leveling roller device includes a mounting frame, on which a leveling roller assembly 1, a residual wax scraping assembly 2 and an adjusting assembly 3 are installed.

[0033] The leveling roller assembly 1 includes a leveling roller 11 rotatably mounted on a mounting frame, a power unit for driving the leveling roller 11 to rotate, and a leveling roller temperature control system for controlling the temperature of the leveling roller.

[0034] The residual wax scraping assembly 2 includes a scraper blade 21, a residual wax recovery tank 22, and a residual wax recovery temperature control system. The scraper blade 21 presses against the circumferential surface of the leveling roller. When the leveling roller 11 rotates, the scraper blade 21 continuously scrapes off the excess wax adhering to the circumferential surface of the leveling roller 11. The excess wax enters the residual wax recovery tank 22, and the residual wax recovery temperature control system keeps the wax in the residual wax recovery tank 22 in a liquid state.

[0035] like Figure 4 and Figure 5 As shown, the adjustment assembly 3 includes a micrometer head 31, a micrometer head adjusting block 32, a bolt elongated hole locking structure 35, and a vertical guide hole 34 for the micrometer head adjusting block 32 to slide. The micrometer head adjusting block 32 is fixedly connected to the mounting plate 5 of the lifting mechanism. The vertical guide hole 34 is opened on the mounting frame. The micrometer head adjusting block 32 passes through and extends out of the vertical guide hole. The micrometer head 31 is mounted on the mounting frame and its end abuts against the micrometer head adjusting block 32. When the bolt elongated hole locking structure is in the loosened state, rotating the micrometer head 31 can drive the mounting frame to move up and down relative to the mounting plate 5 of the lifting mechanism, that is, move up and down along the vertical guide hole 34. The bolt elongated hole locking structure 35 includes a bolt elongated hole and a bolt nut. The bolt is installed in the bolt elongated hole and cooperates with the nut to lock or loosen.

[0036] In some embodiments, such as Figure 7As shown, the leveling roller 11 is a hollow roller shaft made of high-strength alloy steel. The outer circumference of the leveling roller 11 is coated with a ceramic layer after ultra-precision grinding. This ceramic coating is typically applied using a plasma spraying process, followed by mirror polishing of the outer circumference. This achieves a radial runout of less than or equal to ±1μm for the leveling roller 11. The ceramic coating thickness is maintained at ≥0.2mm, with a uniformity tolerance of ±0.1mm. Furthermore, the adjustment component 3 uses a micrometer head 31 for height adjustment. The micrometer head 31 has a fine-tuning accuracy of 0.0005mm, achieving micron-level leveling accuracy and improving the flatness and roughness of the wide wax film surface. The adjustment component 3 precisely controls the final thickness and compaction degree of the wax layer by adjusting the gap between the lower surface of the leveling roller 11 and the surface of the printing nozzle.

[0037] The working principle of the leveling roller device used in 3D wax printers is as follows:

[0038] The crossbeam of the 3D wax printer can be raised and lowered. The printing components and leveling roller device are all mounted on the crossbeam. During each layer printing, the printing components spray wax, while the printing platform reciprocates along the X-axis (horizontal axis). Simultaneously, the leveling roller 11 rotates continuously towards the scraper blade 21, carrying excess wax sprayed from the printing components onto the leveling roller 11. The scraper blade 21 continuously scrapes away the excess wax from the leveling roller 11 and collects it into the excess wax recovery tank 22. During its rotation, the leveling roller 11 flattens the surface of the printed wax model, achieving a leveling operation. Then, the crossbeam raises the printing components and leveling roller device to a certain height to continue the process.

[0039] In some embodiments, such as Figure 1 and Figure 7As shown, the leveling roller temperature control system includes a first heating component 121, a first temperature sensor 122, and a first temperature control switch 123. The first heating component 121 and the first temperature sensor 122 are installed inside the leveling roller. Preferably, the first heating component 121 is a heating rod, which can be a metal heating rod. The heating rod is located inside a heating rod sleeve, and sleeve supports are provided at both ends of the heating rod sleeve. The heating rod sleeve is installed in the central hollow hole of the leveling roller 11 through the sleeve supports. The heating rod enables rapid and uniform heating of the leveling roller 11. When the leveling roller 11 rotates, the heating rod remains stationary. The first temperature control switch 123 is installed on a mounting bracket, specifically on the bearing seats 45 at both ends of the leveling roller 11. The first temperature sensor 122 is installed inside the sleeve support and near the right end of the heating rod sleeve. The first heating component 121, the first temperature sensor 122, and the first temperature control switch 123 are electrically connected to a control device. The first temperature sensor 122 is used to monitor and collect the temperature signal inside the leveling roller 11 in real time and transmit the signal to the control device. The control device controls the working power of the heating rod according to the received temperature signal. The first temperature control switch 123 is connected in series in the power supply circuit of the heating rod and is used to cut off the power supply to the heating rod when the temperature exceeds a preset threshold. The control device includes a PID controller. The temperature control logic of the above-mentioned leveling roller temperature control system is as follows: the first temperature sensor 122 provides continuous temperature feedback → the PID controller outputs an adjustment signal → the heating rod adjusts its power → the first temperature control switch 123 acts as a safety protection layer to prevent overheating.

[0040] The working principle of the above-mentioned leveling roller temperature control system is as follows: the first temperature sensor 122 monitors the internal temperature of the roller in real time; the PID algorithm automatically adjusts the heating rod power according to the deviation between the preset temperature (slightly higher than the melting point of the wax material, for example, 2-5℃ higher) and the actual temperature; the first temperature control switch 123 serves as a safety protection, automatically cutting off the heating power supply when the temperature exceeds the preset upper limit value; through the above control, the surface temperature of the leveling roller 11 is stabilized within the target temperature range, softening the slightly raised parts of the wax layer surface, which facilitates subsequent rolling and leveling.

[0041] In some embodiments, the residual wax scraping assembly 2 includes a scraper mounting plate 23, a scraper blade 21 fixed on the scraper mounting plate 23, and the scraper mounting plate 23 is mounted on the residual wax recovery tank 22 through a bolt elongated hole locking structure. After loosening the bolts of the bolt elongated hole locking structure, the vertical position of the scraper mounting plate 23 relative to the residual wax recovery tank 22 can be adjusted. The position of the scraper blade 21 changes with the position of the scraper mounting plate 23. Since the scraper blade 21 is inclined relative to the leveling roller 11, the position change of the scraper blade 21 realizes the adjustment of the pressure of the scraper blade 21 on the circumferential surface of the leveling roller 11. The mounting frame includes an upper mounting base 41, and L-shaped connecting plates 42 are fixed at both ends of the lower part of the upper mounting base 41. The two ends of the residual wax recovery tank 22 are fixedly connected to the L-shaped connecting plates 42.

[0042] like Figure 8 As shown, the residual wax recovery temperature control system includes a second heating component 24, a second temperature sensor 25, and a second temperature control switch 26. The second heating component 24 is installed below the residual wax recovery tank 22, and the second temperature sensor 25 and the second temperature control switch 26 are installed on the residual wax recovery tank 22, preferably on the right end of the residual wax recovery tank 22. The second heating component 24, the second temperature sensor 25, and the second temperature control switch 26 are electrically connected to a control device. The second heating component 24 is preferably a heating rod, which is installed on a heating rod mounting plate 27, which is fixedly installed at the bottom of the residual wax recovery tank 22. The scraper blade 21 continuously scrapes off the excess wax adhering to the outer circumference of the leveling roller 11. The scraped residual wax falls into the residual wax recovery tank 22. The heating rod of the residual wax recovery temperature control system, in conjunction with the second temperature sensor 25 and the second temperature control switch 26, stabilizes the temperature in the residual wax recovery tank 22 within the target temperature range, keeping the residual wax in the residual wax recovery tank 22 in a liquid state. In addition, a conduit is connected to the residual wax recovery tank 22, which in turn connects to the waste wax collection box below the equipment. The residual wax in the residual wax recovery tank 22 can be guided into the waste wax collection box through the conduit for centralized processing. Preferably, the volume of the waste wax collection box is ≥20L. The scraper blade 21, in conjunction with the residual wax recovery tank 22 which has a heating and insulation function, achieves continuous scraping, liquid retention, and centralized recovery of residual wax, preventing waste wax accumulation from affecting equipment operation.

[0043] In some embodiments, such as Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, the upper mounting base 41 includes a horizontal base plate 40, a back plate 43, and end mounting plates 47 located at the left and right ends of the horizontal base plate 40. A reinforcing rib 44 is provided between the back plate 43 and the horizontal base plate 40. L-shaped connecting plates 42 are fixedly connected to the lower part of the end mounting plates 47. Bearing seats 45 for mounting the ends of the leveling roller 11 are fixedly connected to the L-shaped connecting plates 42. A bearing 46 is installed between the end of the leveling roller and the bearing seat 45. The bearing 46 is preferably a P4 grade high-precision angular contact ball bearing. A micrometer head mounting plate 48 is fixed to the top of the back plate 43. The micrometer head is mounted on the micrometer head mounting plate 48. The bolt elongated hole and vertical guide hole of the bolt elongated hole locking structure 35 are located on the back plate 43. Bolts are installed in the bolt elongated holes and cooperate with nuts to lock or loosen the back plate 43 relative to the mounting plate 5 of the lifting mechanism. When the bolts are loosened, the rotating micrometer head 31 can drive the mounting frame to move up and down relative to the mounting plate 5 of the lifting mechanism, that is, to move up and down along the vertical guide hole 34. In turn, the mounting frame drives the leveling roller 11 to move up and down, so as to adjust the vertical position and levelness of the leveling roller 11.

[0044] In some embodiments, such as Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the leveling roller device also includes a dust removal and smoke removal assembly 6. The dust removal and smoke removal assembly 6 includes a high-temperature resistant suction pipe 61, multiple suction pipe branches 62, a fixed bracket 63, an aerogel heat insulation plate 64, and a dust removal protective cover 65. The aerogel heat insulation plate 64 is composed of aerogel heat insulation cotton and heat insulation cotton sheet metal baffles. The high-temperature resistant suction pipe 61 is fixedly connected to multiple spaced suction pipe branches 62. The high-temperature resistant suction pipe 61 is fixedly connected to the upper mounting base 41 through multiple fixed brackets 63. The aerogel heat insulation plate 64 and the dust removal protective cover 65 are located on the front and rear sides of the upper mounting base 41, respectively. The free end of the suction pipe branch 62 and the leveling roller 11 are located between the aerogel heat insulation plate 64 and the dust removal protective cover 65. The high-temperature resistant suction pipe 61 is located above the horizontal base plate 40. The free end of the suction pipe branch 62 passes downward through and extends out of the horizontal base plate 40. The free end of the suction pipe branch 62 is located above the leveling roller 11. The high-temperature resistant dust suction pipe 61 is externally connected to the dust removal and filtration device below the equipment. After the exhaust dust is treated by the dust removal and filtration device, the emission of harmful dust can be greatly reduced.

[0045] In some embodiments, the scraper blade 21 is made of ultra-high molecular weight polyethylene (UHMWPE) or wear-resistant stainless steel (SUS440C). Therefore, the scraper blade 21 has corrosion resistance and high temperature resistance, and does not swell or deform when in contact with wax at 100°C for a long time.

[0046] In some embodiments, such as Figure 2 As shown, the power unit of the leveling roller assembly 1 includes a stepper motor 12 and a pulley drive mechanism. The stepper motor 12 drives the pulley drive mechanism to rotate the leveling roller. The pulley drive mechanism includes a driving pulley 13, a driven pulley 14, and a drive belt 15. The drive belt 15 is wound around the driving pulley 13 and the driven pulley 14. The output shaft of the stepper motor 12 is connected to the driving pulley 13, and the driven pulley 14 is fixedly connected to one end of the leveling roller 11. The speed adjustment system is equipped with a stepper motor and a control system to realize the speed adjustment of the stepper motor and maintain a large torque. The speed can be adjusted according to the printing layer thickness, wax characteristics, and moving speed to achieve fine and efficient leveling.

[0047] In summary, the leveling roller device for a 3D wax printer of the present invention adopts a coordinated motion mode in which the leveling roller rotates and the printing platform moves simultaneously. The leveling roller does not need to move along the printing platform direction, simplifying the motion mechanism and making it suitable for printing large-sized workpieces. The outer peripheral surface of the leveling roller is coated with a ceramic layer after ultra-precision grinding. The ceramic coating is usually applied through plasma spraying, and the outer peripheral surface of the coated ceramic layer is mirror-polished, achieving a radial runout of less than or equal to ±1μm for the leveling roller. In addition, the adjustment component uses a micrometer head to achieve height adjustment, achieving micron-level leveling accuracy and improving the flatness and roughness of the wide wax film surface. The scraper blade, in conjunction with a residual wax recovery tank with heating and heat preservation functions, enables continuous scraping, liquid retention, and centralized recovery of residual wax, avoiding the accumulation of waste wax that affects equipment operation.

[0048] Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention shall be included within the scope of protection of this invention.

Claims

1. A leveling roller device for a 3D wax printer, the leveling roller device being mounted on a mounting plate of the lifting mechanism of the 3D wax printer, characterized in that: The leveling roller device includes a mounting frame, on which a leveling roller assembly, a residual wax scraping assembly, an adjusting assembly, and a dust and smoke removal assembly are mounted. The leveling roller assembly includes a leveling roller rotatably mounted on the mounting frame, a power device for driving the leveling roller to rotate, and a leveling roller temperature control system for controlling the temperature of the leveling roller. The excess wax scraping assembly includes a scraper blade, an excess wax recovery tank, and an excess wax recovery temperature control system. The scraper blade presses against the circumferential surface of the leveling roller. When the leveling roller rotates, the scraper blade continuously scrapes off the excess wax adhering to the circumferential surface of the leveling roller. The excess wax enters the excess wax recovery tank, and the excess wax recovery temperature control system keeps the wax in the excess wax recovery tank in a liquid state. The adjustment assembly includes a micrometer head, a micrometer head adjustment block, a bolt elongated hole locking structure, and a vertical guide hole for the micrometer head adjustment block to slide. The micrometer head adjustment block is fixedly connected to the mounting plate of the lifting mechanism. The vertical guide hole is opened on the mounting frame. The micrometer head adjustment block passes through and extends out of the vertical guide hole. The micrometer head is mounted on the mounting frame and its end abuts against the micrometer head adjustment block. When the bolt elongated hole locking structure is in the loosened state, rotating the micrometer head can drive the mounting frame to move up and down relative to the mounting plate of the lifting mechanism.

2. The leveling roller device for a 3D wax printer as described in claim 1, characterized in that: The leveling roller is a hollow roller shaft made of high-strength alloy steel. The outer circumferential surface of the leveling roller is covered with a ceramic coating after ultra-precision grinding, and the outer circumferential surface of the covered ceramic coating is mirror-polished.

3. A leveling roller device for a 3D wax printer as described in claim 2, characterized in that: The leveling roll temperature control system includes a first heating component, a first temperature sensor, and a first temperature control switch. The first heating component and the first temperature sensor are installed inside the leveling roll, and the first temperature control switch is installed on the mounting frame. The first heating component, the first temperature sensor, and the first temperature control switch are electrically connected to the control device.

4. A leveling roller device for a 3D wax printer as described in claim 3, characterized in that: The residual wax scraping assembly includes a scraper mounting plate, the scraper blade is fixed on the scraper mounting plate, the scraper mounting plate is installed on the residual wax recovery tank through a bolt elongated hole locking structure, the mounting frame includes an upper mounting base, and L-shaped connecting plates are fixed to the two ends of the lower part of the upper mounting base, and the two ends of the residual wax recovery tank are fixedly connected to the L-shaped connecting plates respectively.

5. A leveling roller device for a 3D wax printer as described in claim 4, characterized in that: The residual wax recovery temperature control system includes a second heating component, a second temperature sensor, and a second temperature control switch. The second heating component is installed below the residual wax recovery tank, and the second temperature sensor and the second temperature control switch are installed on the residual wax recovery tank. The second heating component, the second temperature sensor, and the second temperature control switch are electrically connected to the control device.

6. A leveling roller device for a 3D wax printer as described in claim 5, characterized in that: The dust and smoke removal assembly includes a high-temperature resistant suction pipe, multiple suction pipe branches, a fixed bracket, an aerogel heat insulation plate, and a suction protective cover. The high-temperature resistant suction pipe is fixedly connected to the multiple spaced suction pipe branches. The high-temperature resistant suction pipe is fixedly connected to the upper mounting base through multiple fixed brackets. The aerogel heat insulation plate and the suction protective cover are located on the front and rear sides of the upper mounting base, respectively. The free end of the suction pipe branch and the leveling roller are located between the aerogel heat insulation plate and the suction protective cover. The free end of the suction pipe branch is located above the leveling roller.

7. A leveling roller device for a 3D wax printer as described in claim 6, characterized in that: The scraper blade is made of ultra-high molecular weight polyethylene or wear-resistant stainless steel.

8. A leveling roller device for a 3D wax printer as described in claim 4, characterized in that: The power unit includes a stepper motor and a pulley transmission mechanism. The stepper motor drives the pulley transmission mechanism to rotate the leveling roller.

9. A leveling roller device for a 3D wax printer as described in claim 5, characterized in that: The upper mounting base includes a horizontal base plate, a back plate, and end mounting plates located at the left and right ends of the horizontal base plate. A reinforcing rib is provided between the back plate and the horizontal base plate. An L-shaped connecting plate is fixedly connected to the lower part of the end mounting plate. A bearing seat for mounting the end of the leveling roller is fixedly connected to the L-shaped connecting plate. A bearing is installed between the end of the leveling roller and the bearing seat.

10. A leveling roller device for a 3D wax printer as described in claim 9, characterized in that: A micrometer head mounting plate is fixed to the top of the back plate, the micrometer head is mounted on the micrometer head mounting plate, and the bolt elongated hole locking structure and the vertical guide hole are located on the back plate.

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