An intelligent all-round photosensitive 3D printing secondary curing equipment

Abstract

The present invention discloses an intelligent all-round photosensitive 3D printing secondary curing device, comprising a stand and a processing cylinder, the stand is slidably connected to a lifting frame, a loading tray is fixed under the lifting frame, and a plurality of suction nozzles are distributed circumferentially under the loading tray; the processing cylinder is concentric with the loading tray, a plurality of supporting springs are provided at the bottom of the processing cylinder, and a vibration motor is also provided at the bottom of the processing cylinder; compared with the prior art, the present invention improves curing efficiency and quality, optimizes surface finish and aesthetics, enhances workpiece performance and stability, reduces processing dead angles and improves uniformity, improves the degree of automation and ease of operation, and improves environmental protection and energy saving, and shows remarkable effects.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, in particular to an intelligent omnidirectional photosensitive 3D printing secondary curing device. Background Art

[0002] The application of photosensitive resin 3D printing technology in the fields of manufacturing, medical treatment, aerospace, etc. is becoming more and more widespread. However, photosensitive resin 3D printing technology has problems such as insufficient strength of printed objects and rough surface, so secondary curing is required. Existing secondary curing equipment mostly uses heating, ultraviolet (UV) or visible light irradiation to perform secondary processing on 3D printed objects. These devices usually include key components such as heating chambers, UV light sources or visible light sources, and control systems. The heating chamber is heated by electric heating elements to cause the resin or polymer in the printed object to undergo a cross-linking reaction; the UV or visible light source changes the molecular structure of the printed object through the curing reaction of the photosensitive substance, thereby improving its strength and durability.

[0003] However, existing secondary curing equipment has exposed many limitations in practical applications: existing heating secondary curing equipment often uses a single heat source or a simple heating method, which leads to uneven temperature distribution on the surface and inside of the workpiece, thus affecting the curing effect. Large temperature gradient will not only reduce the curing quality, but may also cause deformation or cracking of the workpiece; for workpieces with complex structures or large sizes, existing equipment often finds it difficult to penetrate deep into the workpiece for sufficient curing, resulting in defects such as insufficient curing and bubbles inside the workpiece, which seriously affect the mechanical properties and durability of the workpiece; although secondary curing can improve the surface quality of printed materials to a certain extent, it cannot completely solve the problem that tiny bumps or depressions may form on the surface of the material during the printing and curing process, affecting the appearance and functionality; for workpieces with complex curved surfaces or internal cavities, existing equipment often has dead angles during the processing process and cannot fully cure these areas.

[0004] Therefore, it is necessary to provide an intelligent all-round photosensitive 3D printing secondary curing device to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: an intelligent all-round photosensitive 3D printing secondary curing device, comprising a stand and a processing cylinder, the stand is slidably connected to a lifting frame, a loading tray is fixed under the lifting frame, and a plurality of suction nozzles are distributed on the circumference under the loading tray;

[0006] The processing cylinder is concentric with the loading disc, a plurality of supporting springs are arranged at the bottom of the processing cylinder, and a vibration motor is also arranged at the bottom of the processing cylinder.

[0007] Furthermore, as a preference, the processing cylinder is divided into two parts, an upper part and an lower part, by a partition plate, and the partition plate has a plurality of through holes distributed around the circumference of each suction nozzle.

[0008] Further, as a preference, a side wall of the upper portion of the processing cylinder is provided with an air duct, an air inlet of the air duct is connected to the fan, and an air outlet is connected to the cloth bag.

[0009] Further, as a preference, a plurality of rotatable pulleys are distributed on the circumference above the loading tray, each of the pulleys penetrates below the loading tray and is connected to a turntable, and the suction nozzle is fixed in the turntable;

[0010] A tensioning wheel is arranged between two adjacent pulleys, and each pulley and the tensioning wheel are connected together by an S-shaped winding synchronous belt, and one of the tensioning wheels can be driven to rotate by a synchronous belt driving device.

[0011] Further, preferably, the suction nozzle is eccentrically connected to the turntable.

[0012] Further, as a preference, a bottom cylinder connected to the bottom of the processing cylinder is fixed at the center below the partition plate, and an electric heating pipe is provided on the outer wall of the bottom cylinder.

[0013] Further, preferably, there is a column in the center above the partition plate, a plurality of nozzles are distributed circumferentially on the side wall of the column, and there is a circular hole in the center of the loading tray that can pass through the column.

[0014] Further, as a preference, the nozzle is hinged on the side wall of the column, a connecting rod is hinged on the middle part of the nozzle, each of the connecting rods is hinged to a connecting ring, and the connecting ring is slidably sleeved in the column.

[0015] Furthermore, as a preference, the column is rotatably connected to the partition plate, a central tube is fixed in the column, the central tube passes through the partition plate into the bottom tube, and a rotating drive device capable of driving the central tube to rotate is provided in the bottom tube.

[0016] Further, as a preference, a lifting plate is rotatably connected below the connecting ring, a lifting cylinder is provided in the bottom tube, and a piston rod of the lifting cylinder penetrates the partition plate and is fixed to the lifting plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, the resin workpiece vibrates at a high frequency in the quartz sand, which promotes the rapid movement and rearrangement of the molecules inside the resin workpiece, so that the resin molecules reach the optimal bonding state required for curing more quickly, improves the uniformity and density of curing, and effectively removes the tiny bubbles and burrs on the surface of the resin workpiece, significantly improving the surface finish and aesthetics of the workpiece. At the same time, the electric heating tube is used to heat the quartz sand, which can quickly and evenly increase the temperature around the resin workpiece, thereby accelerating the curing reaction of the resin.

[0019] In the present invention, the eccentric connection design of the turntable rotation and the suction nozzle enables the resin workpiece to rotate during the vibration process and achieve multi-directional three-dimensional vibration, effectively avoiding processing dead angles that may be generated during the processing of complex shaped workpieces, ensuring that the resin workpiece can be fully vibrated and cured in all directions, and improving the uniformity and consistency of processing.

[0020] In the present invention, curing agent and / or paint is sprayed on the resin workpiece through a circularly rotating tube and a nozzle that swings up and down. The curing agent reacts chemically with the resin base material, which can significantly accelerate the curing process of the resin, allowing the resin molecules to form a stable cross-linked structure more quickly, thereby shortening the overall curing time. When used in conjunction with paint, it can also enhance the adhesion between the paint film and the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an intelligent all-round photosensitive 3D printing secondary curing device;

[0022] Figure 2 It is a structural schematic diagram of the loading tray;

[0023] Figure 3 It is a structural schematic diagram of a processing cylinder;

[0024] Figure 4 It is a structural diagram of the column;

[0025] In the figure: 1. stand; 2. processing cylinder; 21. air duct; 3. lifting frame; 4. loading plate; 41. pulley; 42. tensioning wheel; 43. synchronous belt; 44. synchronous belt driving device; 5. suction nozzle; 51. turntable; 6. supporting spring; 61. vibration motor; 7. partition plate; 71. through hole; 72. bottom cylinder; 8. column; 81. connecting ring; 82. connecting rod; 83. lifting ring; 9. nozzle; 10. fan; 11. center tube; 12. rotation driving device; 13. lifting cylinder; 14. electric heating tube. DETAILED DESCRIPTION

[0026] See also Figure 1In an embodiment of the present invention, an intelligent all-round photosensitive 3D printing secondary curing device includes a stand 1 and a processing cylinder 2, wherein the stand 1 is slidably connected to a lifting frame 3, a loading tray 4 is fixed under the lifting frame 3, and a plurality of suction nozzles 5 are distributed circumferentially under the loading tray 4;

[0027] The processing cylinder 2 is concentric with the loading tray 4 , a plurality of supporting springs 6 are provided at the bottom of the processing cylinder 2 , and a vibration motor 61 is also provided at the bottom of the processing cylinder 2 .

[0028] The processing cylinder 2 contains quartz sand, and the bottoms of multiple resin workpieces to be processed are adsorbed under each suction nozzle 5. The lifting frame 3 descends until the resin workpiece is buried in the quartz sand, and the processing cylinder 2 is vibrated at a high frequency by the vibration motor 61, thereby driving the resin workpiece to vibrate at a high frequency. The high-frequency vibration can increase the movement speed of the molecules inside the resin workpiece, so that the resin molecules can reach the arrangement and bonding state required for curing more quickly, which helps the resin workpiece to release internal stress during the curing process; it can also remove burrs and tiny bubbles on the surface of the resin workpiece by friction, thereby improving the surface smoothness and aesthetics of the workpiece.

[0029] In this embodiment, the processing cylinder 2 is divided into two parts, an upper part and an lower part, by a partition plate 7 , and the partition plate 7 has a plurality of through holes 71 distributed around the circumference corresponding to each suction nozzle 5 .

[0030] In this embodiment, an air duct 21 is provided on the side wall of the upper portion of the processing cylinder 2, an air inlet of the air duct 21 is connected to the fan 10, and an air outlet is connected to the cloth bag.

[0031] The quartz sand is in the lower part of the processing cylinder 2, and the resin workpiece passes through the through hole 71 and is buried in the quartz sand for processing. After processing, it rises to the upper part of the processing cylinder 2, and the high-speed airflow blown by the fan 10 can clean the quartz sand remaining on the surface of the workpiece.

[0032] See also Figure 2 In this embodiment, a plurality of rotatable pulleys 41 are distributed on the circumference above the loading tray 4, each of the pulleys 41 penetrates the bottom of the loading tray 4 and is connected to a turntable 51, and the suction nozzle 5 is fixed in the turntable 51;

[0033] A tensioning wheel 42 is provided between two adjacent pulleys 41 , and each pulley 41 and tensioning wheel 42 are connected together through an S-shaped winding synchronous belt 43 , wherein one tensioning wheel 42 can be driven to rotate by a synchronous belt driving device 44 .

[0034] The turntable 51 can close the through hole 71, and the loading plate 4 can close the three openings of the processing cylinder 2, so that the lower part of the processing cylinder 2 can be vibrated and processed in a closed space, and the upper part of the processing cylinder 2 can be blown and cleaned in a closed space to avoid dust caused by quartz sand;

[0035] The synchronous belt drive device 44 can drive each turntable 51 to rotate, so that the resin workpiece can rotate on its own, which is conducive to more uniform vibration and cleaning, and avoids processing dead angles caused by workpieces with complex shapes.

[0036] In this embodiment, the suction nozzle 5 is eccentrically connected to the rotating disk 51 .

[0037] When the turntable 51 rotates, the suction nozzle 5 generates lateral vibration due to the eccentric connection with the turntable 51 , which, combined with the vertical vibration of the processing cylinder 2 , puts the resin workpiece in a multi-directional three-dimensional vibration state, which helps to improve the curing effect of the material inside the resin workpiece.

[0038] See also Figure 3 In this embodiment, a bottom cylinder 72 connected to the bottom of the processing cylinder 2 is fixed at the center below the partition plate 7, and an electric heating tube 14 is provided on the outer wall of the bottom cylinder 72. The quartz sand is between the outer wall of the bottom cylinder 72 and the inner wall of the processing cylinder 2. The heating by the electric heating tube 14 can quickly transfer heat to the quartz sand and the resin workpiece, increase the overall temperature, and thus accelerate the curing reaction of the resin. The curing speed of the resin is usually proportional to the temperature, so heating can promote the cross-linking reaction between the resin molecules and shorten the curing time.

[0039] In this embodiment, a column 8 is provided at the center above the partition plate 7 , a plurality of nozzles 9 are distributed circumferentially on the side wall of the column 8 , and a circular hole capable of passing through the column 8 is provided at the center of the loading tray 4 .

[0040] The curing agent and / or paint can be sprayed onto the resin workpiece through the nozzle 9, thereby enhancing the cross-linking between the resin molecules and improving the hardness and stability thereof.

[0041] See also Figure 4 In this embodiment, the nozzle 9 is hinged on the side wall of the column 8, and a connecting rod 82 is hinged in the middle of the nozzle 9. Each of the connecting rods 82 is hinged to a connecting ring 81, and the connecting ring 81 is slidably mounted in the column 8.

[0042] That is, by sliding the connecting ring 81 up and down, the connecting rod 82 can push the nozzle 9 to rotate at different angles, thereby changing the up and down spraying angle of the nozzle 9, and can evenly spray the curing agent and / or paint to the resin workpiece.

[0043] In this embodiment, the column 8 is rotatably connected to the partition plate 7, a central tube 11 is fixed inside the column 8, and the central tube 11 passes through the partition plate 7 to the bottom tube 72, and a rotating drive device 12 capable of driving the central tube 11 to rotate is provided inside the bottom tube 72.

[0044] The central tube 11 is connected to each nozzle 9 through a hose, and the rotary drive device 12 can drive the column 8 to rotate so that the nozzle 9 rotates around the circumference of the column 8, and can evenly spray the curing agent and / or paint to the resin workpiece.

[0045] In this embodiment, a lifting plate 83 is rotatably connected below the connecting ring 81, and a lifting cylinder 13 is provided in the bottom cylinder 72, and a piston rod of the lifting cylinder 13 penetrates the partition plate 7 and is fixed to the lifting plate 83. The lifting of the lifting cylinder 13 can make the connecting ring 81 slide up and down.

[0046] The specific implementation includes:

[0047] The bottom of the resin workpiece to be processed is sucked under the suction nozzle 5, and the lifting frame 3 is lowered to a suitable position to ensure that the resin workpiece can be completely buried in the quartz sand;

[0048] The synchronous belt drive device 44 drives each turntable 51 to rotate, so that the resin workpiece rotates;

[0049] Start the vibration motor 61 to make the processing cylinder 2 generate high-frequency vibration, driving the resin workpiece to vibrate at high frequency in the quartz sand. This process not only accelerates the movement and combination of resin molecules, but also helps to release internal stress and remove burrs and tiny bubbles on the surface of the workpiece;

[0050] Since the turntable 51 on the loading tray 4 is eccentrically connected to the suction nozzle 5, the resin workpiece will also generate lateral vibration during the vibration process, which, combined with the vertical vibration of the processing cylinder 2, forms a multi-directional three-dimensional vibration, further improving the curing effect;

[0051] At the same time, the outer wall of the bottom tube 72 is heated by the electric heating tube 14, and the heat is quickly transferred to the quartz sand and the resin workpiece, thereby increasing the overall temperature and accelerating the curing reaction of the resin;

[0052] When the resin workpiece reaches a certain degree during vibration and heating, the lifting frame 3 rises, takes the resin workpiece out of the quartz sand layer and places it on the upper part of the processing cylinder 2, starts the fan 10, blows a high-speed airflow to the upper part of the processing cylinder 2 through the air duct 21, and cleans the quartz sand remaining on the surface of the workpiece;

[0053] Start the nozzle 9 to spray the curing agent and / or paint, and make the nozzle 9 swing up and down by lifting the lifting cylinder 13, and the rotary drive device 12 drives the column 8 to make the nozzle 9 rotate in a circle, so as to ensure that the curing agent and / or paint evenly covers all parts of the workpiece;

[0054] After the processing is completed, all functional modules are turned off, and the resin workpiece is removed from the suction nozzle 5 for subsequent processing or inspection.

[0055] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent all-round photosensitive 3D printing secondary curing device, characterized in that: It comprises a stand (1) and a processing cylinder (2), wherein the stand (1) is slidably connected to a lifting frame (3), a loading tray (4) is fixed below the lifting frame (3), and a plurality of suction nozzles (5) are distributed around the lower circumference of the loading tray (4); The processing cylinder (2) is concentric with the loading plate (4), a plurality of supporting springs (6) are provided at the bottom of the processing cylinder (2), and a vibration motor (61) is also provided at the bottom of the processing cylinder (2); The processing cylinder (2) is divided into an upper and lower part by a partition plate (7), and the partition plate (7) has a plurality of through holes (71) distributed around the circumference corresponding to each suction nozzle (5); A bottom cylinder (72) connected to the bottom of the processing cylinder (2) is fixed at the center below the partition plate (7), and an electric heating pipe (14) is provided on the outer wall of the bottom cylinder (72); Quartz sand is placed inside the processing cylinder (2), and the quartz sand is located between the outer wall of the bottom cylinder (72) and the inner wall of the processing cylinder (2); A plurality of rotatable pulleys (41) are distributed on the circumference above the loading tray (4), each of the pulleys (41) penetrates below the loading tray (4) and is connected to a turntable (51), and the suction nozzle (5) is fixed in the turntable (51); A tensioning wheel (42) is provided between two adjacent pulleys (41), and each pulley (41) and the tensioning wheel (42) are connected together via an S-shaped winding synchronous belt (43), wherein one of the tensioning wheels (42) can be driven to rotate via a synchronous belt driving device (44); The suction nozzle (5) is eccentrically connected to the rotating disk (51).

2. The intelligent omnidirectional photosensitive 3D printing secondary curing device according to claim 1, characterized in that: An air duct (21) is provided on the side wall of the upper portion of the processing cylinder (2); an air inlet of the air duct (21) is connected to the fan (10), and an air outlet is connected to the cloth bag.

3. The intelligent omnidirectional photosensitive 3D printing secondary curing device according to claim 1, characterized in that: A column (8) is provided at the center above the partition plate (7), a plurality of nozzles (9) are distributed around the circumference of the side wall of the column (8), and a circular hole capable of passing through the column (8) is provided at the center of the loading tray (4).

4. The intelligent omnidirectional photosensitive 3D printing secondary curing device according to claim 3, characterized in that: The nozzle (9) is hinged on the side wall of the column (8), a connecting rod (82) is hinged in the middle of the nozzle (9), each connecting rod (82) is hinged in a connecting ring (81), and the connecting ring (81) is slidably sleeved in the column (8).

5. The intelligent omnidirectional photosensitive 3D printing secondary curing device according to claim 4, characterized in that: The column (8) is rotatably connected to the partition plate (7), a central tube (11) is fixed inside the column (8), the central tube (11) passes through the partition plate (7) into a bottom tube (72), and a rotation drive device (12) capable of driving the central tube (11) to rotate is provided inside the bottom tube (72).

6. The intelligent omnidirectional photosensitive 3D printing secondary curing device according to claim 5, characterized in that: A lifting plate (83) is rotatably connected below the connecting ring (81), a lifting cylinder (13) is provided in the bottom cylinder (72), and a piston rod of the lifting cylinder (13) passes through the partition plate (7) and is fixed to the lifting plate (83).

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