Photocuring 3D printer

Abstract

The invention relates to the technical field of 3D printers, and discloses a photocuring 3D printer which comprises a case, a cover plate arranged on the case, a control motor arranged on the side wall of the case, a sliding rail arranged on the side wall of the case, a bearing block arranged in the sliding rail in a sliding mode and a reciprocating lead screw arranged at the driving end of the control motor. The bearing block is arranged on the machine box, the ball nut is arranged on the bearing block, the light curing groove is formed in the upper end of the machine box, the feeding unit is arranged in the machine box, and the feeding unit comprises a feeding part and a recycling part which are arranged in the machine box; through the arrangement of the feeding part, when an operator needs to print, feeding is automatically completed, high-sensitivity resin is stirred in the feeding process, it is guaranteed that the high-sensitivity resin enters the photocuring groove in a uniform state, the printing quality is guaranteed, and after printing is completed, the remaining high-sensitivity resin is automatically recycled; and the deterioration possibility of the high-sensitivity resin caused by incapability of timely recovery by an operator is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a light-curing 3D printer. Background Art

[0002] A photocuring 3D printer (also known as a stereolithography machine, SLA), a digital light processor (DLP) or a liquid crystal photocuring printer is a type of device that uses photocuring resin for 3D printing. This type of printer achieves printing by curing liquid high-sensitive resin layer by layer into a solid object. A photocuring 3D printer has the advantages of high precision and high resolution, and is suitable for making models with rich details, printing complex geometric shapes and structures, and producing finished products with smooth surfaces, reducing post-processing work, etc. At the same time, due to the simplified operation of photocuring 3D printers and the preset parameters of the manufacturer, it has become the choice of many enthusiasts.

[0003] Due to its high precision and excellent surface quality, photocuring 3D printing technology is widely used in various design and production fields, but the following problems still exist: In the prior art, most high-sensitive resins are stored separately in resin containers. When users use the printer, they need to pour the high-sensitive resin into the photocuring tank (resin tank) first. After use, the remaining high-sensitive resin in the photocuring tank needs to be poured back into the resin container for the next use. At the same time, the resin container needs to be shaken before adding the high-sensitive resin to ensure the uniformity of the internal high-sensitive resin. These processes require manual operation. If the operation is improper, it may cause leakage of the high-sensitive resin or tipping of the resin container. The high-sensitive resin has certain toxicity. If leakage occurs, it will have a certain impact on the health of the surrounding personnel. In addition, the unused high-sensitive resin should be recycled in time after the printer is completed. If the staff cannot recycle the high-sensitive resin in time after the printer is completed, the high-sensitive resin will be exposed to the outside world for a longer time (longer contact with external light), which is more likely to affect the quality of the high-sensitive resin and is not conducive to subsequent continued use. Summary of the invention

[0004] In view of the problems in the prior art that manual loading and recycling are required, highly sensitive resins are prone to leakage, and the highly sensitive resins cannot be recycled in time after use, a light-curing 3D printer is proposed.

[0005] The present application provides a photocuring 3D printer, the purpose of which is to: by setting a loading component, the loading is automatically completed when the operator needs to print, and the high-sensitive resin is stirred during the loading process to ensure that the high-sensitive resin enters the photocuring tank in a uniform state to ensure the printing quality, and by setting a recycling component and a signal component, the remaining high-sensitive resin is automatically recycled after printing is completed to prevent the operator from failing to recycle it in time, which increases the possibility of deterioration of the high-sensitive resin.

[0006] The technical solution of the present invention is: a light-curing 3D printer, comprising a chassis, a cover plate arranged on the chassis, a control motor arranged on the side wall of the chassis, a slide rail arranged on the side wall of the chassis, a bearing block slidably arranged in the slide rail, a reciprocating screw arranged at the driving end of the control motor, a ball nut arranged on the bearing block, a light-curing slot arranged at the upper end of the chassis, and also comprising a feeding unit arranged inside the chassis, wherein the feeding unit comprises a feeding component and a recycling component arranged inside the chassis;

[0007] The feeding component includes a bottom plate arranged inside the chassis, a support plate arranged on the upper end of the bottom plate, a storage barrel arranged above the support plate, a feeding barrel arranged on the storage barrel, a driving motor arranged on the upper end of the bottom plate, a threaded rod arranged at the driving end of the driving motor, a plurality of stirring rods arranged at the lower end of the threaded rod, a lifting plate threadedly arranged at the threaded part of the threaded rod, a plurality of connecting pipes arranged on the lifting plate, a one-way valve arranged inside the plurality of connecting pipes, a limiting groove arranged on the side wall of the feeding barrel, limiting blocks arranged at both ends of the lifting plate, a matching ring arranged at the upper end of the feeding barrel and the upper end of the lifting plate, a plurality of connecting ropes arranged between the two matching rings, a stirring ball arranged on the plurality of connecting ropes, a feeding square tube arranged at the upper end of the chassis, a feeding port arranged on the side wall of the light curing tank, and the feeding square tube is connected with the feeding port, and a conveying pipe arranged between the upper end of the feeding barrel and the lower end of the feeding square tube, and the feeding barrel and the feeding square tube are connected through the conveying pipe.

[0008] The ball nut is threadedly connected to the reciprocating screw rod, and the lower end of the loading cylinder is fixedly connected to the upper end of the storage cylinder. The interiors of the loading cylinder and the storage cylinder are respectively divided into a liquid storage chamber, a buffer chamber, a pressurized chamber and a placement chamber. The threaded rod seals and rotates through the storage cylinder and the loading cylinder. The length of the thread of the threaded rod is equal to the sum of the lengths of the buffer chamber and the pressurized chamber, and the length of the placement chamber is equal to the sum of the lengths of the two matching rings. Multiple stirring rods are located in the liquid storage chamber, and the two limit blocks both slide in the limit grooves. The matching ring located at the top is fixedly connected to the upper end of the threaded rod, and the matching ring located at the bottom is rotatably installed on the lifting plate. A sealing ring is fixedly provided at the connection between the lifting plate and the threaded rod, and a one-way valve 2 is fixedly installed inside the feed pipe. The two end pipe openings of the connecting pipe are respectively located at the upper and lower ends of the lifting plate.

[0009] Furthermore, the recovery component includes a mounting plate arranged on the inner side wall of the chassis, two arc-shaped brackets arranged on the mounting plate, a recovery cylinder arranged between the two arc-shaped brackets, a recovery square tube arranged at the upper end of the chassis, liquid flow holes opened on the recovery square tube and the side wall of the photocuring tank, a recovery tube arranged between the recovery cylinder and the recovery square tube, a long tube arranged between the bottom end of the recovery cylinder and the side wall of the storage cylinder, a one-way valve three arranged in the long tube, the recovery square tube is fixedly connected to the photocuring tank through the liquid flow hole, an automatic valve one is arranged at the liquid flow hole of the recovery square tube, a signal component and a control component are arranged on the side wall of the chassis, and a liquid replenishment component is arranged on the side wall of the lower end of the chassis.

[0010] Furthermore, the signal component includes a switch base arranged on the side wall of the chassis, an identification switch arranged on the switch base, and a trigger rod arranged on the side wall of the supporting block, and the identification switch is electrically connected to an automatic valve in the recovery square tube.

[0011] Furthermore, the control component includes a toothed plate arranged on the side wall of the supporting block away from the trigger rod, a rotating shaft arranged on the side wall of the chassis, a one-way bearing arranged at one end of the rotating shaft, a transmission gear arranged on the outer ring of the one-way bearing, a mating wheel arranged on the rotating shaft, a protruding rod arranged on the mating wheel, a controller arranged on the side wall of the chassis, and a trigger button arranged on the controller, one end of the trigger button is provided with a chamfer, and the controller is electrically connected to the drive motor.

[0012] Furthermore, the identification switch is located above the controller, and the bearing block is located between the identification switch and the controller.

[0013] Furthermore, the liquid replenishing component includes a liquid filling box arranged on the side wall of the chassis, a liquid filling pipe arranged at the upper end of the liquid filling box, a short tube arranged between the liquid filling box and the recovery tube, an automatic valve 2 arranged inside the short tube, and a liquid level sensor arranged on the recovery tube, and the liquid level sensor is electrically connected to the automatic valve 2 and the identification switch respectively.

[0014] Furthermore, a resin filter is arranged above the inside of the recovery cylinder, and a balance pipe is fixedly installed on the upper end of the recovery cylinder.

[0015] Furthermore, the volume of the recovery cylinder at the lower end of the resin filter is equal to the volume of the pressurizing chamber.

[0016] Beneficial effects of the present invention:

[0017] 1. By setting up the feeding parts and control components, the operator can complete automatic feeding when using the printer, and stir the high-sensitive resin during the feeding process to ensure that the high-sensitive resin is input into the light curing tank in a uniform state, thereby improving the printing quality and effect. At the same time, during the feeding process, the high-sensitive resin in the recovery cylinder is input into the storage cylinder through pressure changes, which is convenient for next use.

[0018] 2. By setting up recycling components and signal components, when the printer completes printing, the automatic valve in the recycling square tube is automatically opened to recycle the unused high-sensitive resin into the recycling cylinder and purify it through the resin filter to prevent the operator from failing to recycle the high-sensitive resin in time, causing the high-sensitive resin to be exposed to the outside world for a longer time and increase the possibility of its deterioration, thereby reducing the cost of use and improving the utilization rate of the high-sensitive resin.

[0019] 3. By setting up a liquid replenishing component, when the recovery cylinder is recovered, the liquid level sensor will automatically fill the recovery cylinder to ensure that the recovery cylinder, storage cylinder and loading cylinder are always filled with high-sensitive resin. The use of high-sensitive resin will not affect the normal loading of the cylinder due to the lack of high-sensitive resin inside. No manual participation is required throughout the process, which will not cause harm to the human body and waste of high-sensitive resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure from a first viewing angle of the present invention;

[0021] Figure 2 It is a schematic diagram of the partial internal structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 For the present invention Figure 2 Schematic diagram of the stereoscopic structure from the second viewing angle;

[0024] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0025] Figure 6 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 7 For the present invention Figure 6 The enlarged schematic diagram at C in the middle;

[0027] Figure 8 It is a schematic diagram of the structure of the feeding component of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the material storage barrel of the present invention;

[0029] Fig.10 It is a schematic diagram of the structure of the loading barrel of the present invention;

[0030] Fig.11 It is a schematic diagram of the workflow of the present invention.

[0031] In the figure:

[0032] 1. Chassis; 2. Cover plate; 3. Control motor; 4. Slide rail; 5. Bearing block; 6. Reciprocating screw rod; 7. Light curing tank; 8. Bottom plate; 9. Support plate; 10. Storage barrel; 11. Loading barrel; 12. Driving motor; 13. Threaded rod; 14. Stirring rod; 15. Lifting plate; 16. Connecting pipe; 17. Limiting groove; 18. Liquid level sensor; 19. Matching ring; 20. Connecting rope; 21. Stirring ball; 22. Feeding square tube; 2 3. Feed pipe; 24. Mounting plate; 25. Arc bracket; 26. Recovery cylinder; 27. Recovery square tube; 28. Recovery tube; 29. ​​Long tube; 30. Switch base; 31. Identification switch; 32. Trigger rod; 33. Tooth plate; 34. Rotating shaft; 35. One-way bearing; 36. Transmission gear; 37. Matching wheel; 38. Protruding rod; 39. Controller; 40. Trigger button; 41. Liquid filling tank; 42. Liquid filling tube; 43. Short tube. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] Example 1, reference Figure 1-Figure 2 , Figure 6 as well as Figure 8-Figure 11, which is the first embodiment of the present invention, provides a light-curing 3D printer, including a chassis 1, a cover plate 2 hingedly mounted on the chassis 1, a control motor 3 fixedly mounted on the side wall of the chassis 1, a slide rail 4 fixedly mounted on the side wall of the chassis 1, a bearing block 5 slidably mounted in the slide rail 4, a reciprocating screw 6 fixedly mounted on the driving end of the control motor 3, a ball nut fixedly mounted on the bearing block 5, a light-curing slot 7 fixedly mounted on the upper end of the chassis 1, and also includes a feeding unit installed inside the chassis 1, the feeding unit includes a loading component and a recycling component installed inside the chassis 1; the loading component includes a bottom plate 8 fixedly mounted inside the chassis 1, a support plate 9 fixedly mounted on the upper end of the bottom plate 8, a storage barrel 10 fixedly mounted above the support plate 9, a loading barrel 11 fixedly connected to the storage barrel 10, a driving motor 12 fixedly mounted on the upper end of the bottom plate 8, and a drive motor 12 fixedly mounted on the driving end of the driving motor 12. A threaded rod 13, a plurality of stirring rods 14 fixedly mounted at the lower end of the threaded rod 13, a lifting plate 15 threadedly mounted at the thread of the threaded rod 13, a plurality of connecting pipes 16 fixedly mounted on the lifting plate 15, a one-way valve fixedly mounted inside the plurality of connecting pipes 16, a limiting groove 17 provided on the side wall of the upper barrel 11, limiting blocks provided at both ends of the lifting plate 15, a matching ring 19 rotatably mounted on the upper end of the upper barrel 11 and the upper end of the lifting plate 15, a plurality of connecting ropes 20 fixedly mounted between the two matching rings 19, a stirring ball 21 fixedly mounted on the plurality of connecting ropes 20, a feeding square tube 22 fixedly mounted on the upper end of the chassis 1, a feeding port provided on the side wall of the light curing tank 7, and the feeding square tube 22 is connected to the feeding port, a delivery tube 23 fixedly mounted between the upper end of the upper barrel 11 and the lower end of the feeding square tube 22, and the upper barrel 11 and the feeding square tube 22 are connected through the delivery tube 23. The ball nut is threadedly connected to the reciprocating screw 6, and the lower end of the loading barrel 11 is fixedly connected to the upper end of the storage barrel 10. The interiors of the loading barrel 11 and the storage barrel 10 are respectively divided into a liquid storage chamber, a buffer chamber, a pressurized chamber and a placement chamber. The threaded rod 13 is sealed and rotatably arranged inside the storage barrel 10 and the loading barrel 11. The length of the thread of the threaded rod 13 is equal to the sum of the lengths of the buffer chamber and the pressurized chamber, and the length of the placement chamber is equal to the sum of the lengths of the two matching rings 19. A plurality of stirring rods 14 are located in the liquid storage chamber, and the two limit blocks both slide in the limit groove 17. The matching ring 19 located at the top is fixedly connected to the upper end of the threaded rod 13, and the matching ring 19 located at the bottom is rotatably installed on the lifting plate 15. A sealing ring is fixedly sleeved at the connection between the lifting plate 15 and the threaded rod 13. A one-way valve 2 is fixedly installed inside the feed pipe 23, and the two end pipe openings of the connecting pipe 16 are respectively located at the upper and lower ends of the lifting plate 15.

[0035] Reference Figure 4 and Figure 5The control component includes a toothed plate 33 fixedly mounted on the side wall of the carrier block 5 away from the trigger rod 32, a rotating shaft 34 rotatably mounted on the side wall of the chassis 1, a one-way bearing 35 fixedly mounted on one end of the rotating shaft 34, a transmission gear 36 fixedly mounted on the outer ring of the one-way bearing 35, a matching wheel 37 fixedly mounted on the rotating shaft 34, a protruding rod 38 fixedly mounted on the matching wheel 37, a controller 39 fixedly mounted on the side wall of the chassis 1, and a trigger button 40 fixedly mounted on the controller 39, one end of the trigger button 40 is provided with a chamfer, and the controller 39 is electrically connected to the drive motor 12.

[0036] Specifically, the volume of the pressurized chamber is smaller than the volume of the light-curing tank 7, so that the volume of the high-sensitive resin in the light-curing tank 7 is sufficient for printing after the loading is completed. A mold plate for mold forming is fixedly installed on the carrier block 5. The drive motor 12 is a servo motor, and the trigger button 40 is a reset button. The controller 39 is used to control the start of the drive motor 12. The program is set so that the drive motor 12 rotates a certain number of times each time it is turned on, and then reverses the same number of times. The purpose is that when the drive motor 12 rotates, it will drive the lifting plate 15 to move upward, and then when it reverses the same number of times, the lifting plate 15 moves upward. The function of the feeding component is to press the high-sensitive resin in the feeding barrel 11 into the feeding square tube 22 and flow it into the light curing tank 7 for printing. At the same time, before the high-sensitive resin is pressed into the light curing tank 7, it will be evenly stirred so that the high-sensitive resin is input into the light curing tank 7 in a uniform state to improve the printing quality. The interior of the feeding barrel 11 and the storage barrel 10 are respectively divided into a liquid storage chamber, a buffer chamber, a pressurizing chamber and a placement chamber. The placement chamber is used to accommodate two matching rings 19, a connecting rope 20 and a stirring ball 21, so that when the lifting plate 15 moves upward, the matching ring 19, the connecting rope 20 and the stirring ball 21, the lifting plate 15 can be used to print the high-sensitive resin in the light curing tank 7. The ring 19, the connecting rope 20 and the stirring ball 21 will not block the normal movement of the lifting plate 15. The function of the buffer chamber is as follows: when the lifting plate 15 moves upward under the drive of the driving motor 12, it will slide into the buffer chamber. During the sliding process, it is not in a sealed state, so that when the lifting plate 15 moves downward, the loading barrel 11 is in a flat pressure state. During this process, the rotation of the threaded rod 13 will stir the highly sensitive resin through the stirring rod 14 and the stirring ball 21 to make it uniform. At the same time, when the lifting plate 15 moves into the pressurized chamber, the lifting plate 15 is equivalent to a piston plate. At this time, the lifting plate 15 moves upward. When the lifting plate 15 moves, the pressure in the upper end area of ​​the lifting plate 15 increases, and the high-sensitive resin in the upper end area is pressed into the light-curing tank 7 to achieve the purpose of loading. At the same time, the pressure in the area at the lower end of the lifting plate 15 decreases. At this time, the high-sensitive resin recovered in the recovery cylinder 26 is input into the liquid storage chamber under the action of pressure, so that the high-sensitive resin inside the storage cylinder 10 and the loading cylinder 11 is always filled. At the same time, when the lifting plate 15 moves downward, because the bottom of the lifting plate 15 is full of high-sensitive resin, its lower end enters the upper end of the lifting plate 15 through the connecting pipe 16 under the action of pressure during the downward sliding process.

[0037] The function of the control component is as follows: when the printer is running, the carrier block 5 automatically triggers the loading component to input the high-sensitive resin into the light-curing tank 7 during the downward movement, and the carrier block 5 is slow in the downward movement process, so the loading component has enough time to input the high-sensitive resin in the loading barrel 11 into the light-curing tank 7. At the same time, the transmission gear 36 is installed on the rotating shaft 34 through the one-way bearing 35. When the carrier block 5 moves downward, the transmission gear 36 is driven to rotate in the reverse direction through the tooth plate 33. At this time, the one-way bearing 35 is in a self-locking state. When its outer ring rotates, it will drive the inner ring to rotate. At this time, the transmission gear 36 rotates to drive the rotating shaft 34 to rotate and then trigger the controller 39. When the carrier block 5 moves upward, it drives the transmission gear 36 to rotate in the forward direction. At this time, the outer ring rotation of the one-way bearing 35 will not drive the inner ring to rotate, and then will not trigger the controller 39. This makes it possible for the loading component to be triggered through the controller 39 only when the carrier block 5 moves downward (that is, when the printer is started), and the loading component will not be triggered when the carrier block 5 moves upward (that is, after the printer has finished printing).

[0038] Example 2, reference Figure 2-Figure 3 , Figure 6-Figure 7 as well as Fig.11 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the recovery component includes a mounting plate 24 fixedly mounted on the inner side wall of the chassis 1, two arc-shaped brackets 25 fixedly mounted on the mounting plate 24, a recovery cylinder 26 clamped and mounted between the two arc-shaped brackets 25, a recovery square tube 27 fixedly mounted on the upper end of the chassis 1, a flow hole provided on the recovery square tube 27 and the side wall of the light curing tank 7, a recovery tube 28 fixedly mounted between the recovery cylinder 26 and the recovery square tube 27, a long tube 29 fixedly mounted between the bottom end of the recovery cylinder 26 and the side wall of the storage cylinder 10, a one-way valve 3 fixedly mounted in the long tube 29, and the recovery square tube 27. It is fixedly connected to the photocuring tank 7 through a liquid flow hole, an automatic valve 1 is arranged at the liquid flow hole of the recovery square tube 27, a liquid replenishing component is arranged on the side wall of the lower end of the chassis 1, and the signal component includes a switch base 30 arranged on the side wall of the chassis 1, an identification switch 31 fixedly mounted on the switch base 30, and a trigger rod 32 fixedly mounted on the side wall of the supporting block 5. The identification switch 31 is electrically connected to the automatic valve 1 in the recovery square tube 27, the identification switch 31 is located above the controller 39, and the supporting block 5 is located between the identification switch 31 and the controller 39. A resin filter is fixedly mounted on the upper part of the recovery cylinder 26, and a balance pipe is fixedly mounted on the upper end of the recovery cylinder 26.

[0039] Specifically, when the supporting block 5 moves upward after printing is completed, it will move upward, and after moving upward to the initial position, it will continue to move upward for a short distance. At this time, the trigger rod 32 contacts the identification switch 31. After the identification switch 31 is triggered, the automatic valve will be opened. At this time, the high-sensitive resin that is not fully utilized in the photocuring tank 7 flows into the recovery cylinder 26 through the recovery square tube 27 for recovery, so as to achieve the purpose of automatically recovering the high-sensitive resin, and at the same time, reduce the exposure time of the high-sensitive resin to the outside world as much as possible (the high-sensitive resin is not easily exposed to the light source for a long time, which will cause the physical and chemical properties of the high-sensitive resin to change), prevent the high-sensitive resin from deteriorating, and also prevent the operator from forgetting or other reasons. The situation that the high-sensitive resin cannot be recovered in the first time improves the practicality of the device. The resin filter (this is the prior art and will not be elaborated on here) is used to filter and clean the high-sensitive resin to prevent the recovered high-sensitive resin from containing impurities.

[0040] The remaining structures are the same as those of Example 1.

[0041] Example 3, reference Figure 6-Figure 7 as well as Fig.11 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the liquid replenishing component includes a liquid adding tank 41 fixedly installed on the side wall of the chassis 1, a liquid adding pipe 42 fixedly installed on the upper end of the liquid adding tank 41, a short tube 43 fixedly installed between the liquid adding tank 41 and the recovery cylinder 26, an automatic valve 2 fixedly installed inside the short tube 43, and a liquid level sensor 18 fixedly installed on the recovery cylinder 26. The liquid level sensor 18 is electrically connected to the automatic valve 2 and the identification switch 31 respectively, and the volume of the recovery cylinder 26 at the lower end of the resin filter is equal to the volume of the pressurized chamber.

[0042] Specifically, the liquid level sensor 18 is set to be triggered with a delay, that is, when the identification switch 31 is triggered, the liquid level sensor 18 will be triggered with a delay. Its purpose is: when the identification switch 31 triggers the recovery component, the liquid level sensor 18 will be triggered only after the high-sensitive resin in the photocuring tank 7 completely flows into the recovery cylinder 26. The liquid level sensor 18 is used to detect whether the recovery cylinder 26 at the lower end of the resin filter in the recovery cylinder 26 is in a filled state. Because the part of the high-sensitive resin that is used and the part that are not used during use, under normal circumstances, the high-sensitive resin inside the recovery cylinder 26 must be less than the volume of the high-sensitive resin during feeding. Therefore, the opening of the automatic valve 2 is controlled by the liquid level sensor 18, so that the high-sensitive resin in the liquid adding tank 41 flows into the recovery cylinder 26, ensuring that the volume of the high-sensitive resin in the recovery cylinder 26 is equal to the volume of the loading chamber, so that when the loading component is triggered, the high-sensitive resin in the recovery cylinder 26 is completely sucked into the storage chamber, ensuring that the high-sensitive resin in the storage chamber is always filled.

[0043] The remaining structure is the same as that of Example 2.

[0044] Based on Examples 1-3, the working principle of the present invention is as follows: when the printer is working, the control motor 3 is turned on, and the control motor 3 drives the model disk on the supporting block 5 to move slowly downward through the reciprocating screw 6. During the movement, the toothed plate 33 on the supporting block 5 meshes with the transmission gear 36 and drives the rotating shaft 34 to rotate one circle. The rotating shaft 34 drives the protruding rod 38 on the matching wheel 37 to rotate synchronously. During the rotation of the protruding rod 38, the trigger button 40 is squeezed and the driving motor 12 is triggered through the controller 39.

[0045] The driving motor 12 is controlled by the controller 39 and rotates. The rotation of the driving motor 12 drives the threaded rod 13 to rotate. The rotation of the threaded rod 13 drives the stirring rod 14 and the connecting rope 20 on the matching ring 19 and the stirring ball 21 to rotate synchronously. The stirring rod 14 and the stirring ball 21 stir the highly sensitive resin during their rotation. When the threaded rod 13 just starts to rotate, the lifting plate 15 slides in the buffer chamber. At this time, the upper end of the lifting plate 15 is not in a sealed state, so no material is loaded during the stirring process. When the lifting plate 15 rises to the pressurized chamber area, the upper end of the lifting plate 15 is in a sealed state. When the lifting plate 15 continues to move upward, the highly sensitive resin in the pressurized chamber area is stirred under the action of pressure. It moves upward and flows into the light curing tank 7 through the feed pipe 23. At the same time, when the lifting plate 15 is rising, the pressure in the area at its lower end decreases. At this time, the high-sensitive resin in the recovery cylinder 26 is sucked into the storage cylinder 10 under the action of pressure, and the high-sensitive resin in the storage cylinder 10 is always ensured to be filled. As the supporting block 5 descends, the model plate enters the light curing tank 7 and prints. After the loading is completed, the driving motor 12 reverses the same number of turns. At this time, the lifting plate 15 moves downward. Because a one-way valve is arranged inside the connecting pipe 16, the high-sensitive resin in the area below the lifting plate 15 enters the top of the lifting plate 15 during the descent, ensuring that the lifting plate 15 can be smoothly reset.

[0046] When printing is completed, the supporting block 5 moves upward and resets, and continues to move upward for a distance. At this time, the trigger rod 32 on the supporting block 5 contacts the identification switch 31, and the identification switch 31 opens the automatic valve 1. After the automatic valve 1 is opened, the unused high-sensitive resin in the photocuring tank 7 enters the recovery cylinder 26 through the automatic valve 1, and is purified and filtered by the resin filter. At the same time, the identification switch 31 triggers the liquid level sensor 18, so that the liquid level sensor 18 delays the triggering of the automatic valve 2, so that the liquid adding tank 41 adds high-sensitive resin to the recovery cylinder 26, so that the area below the resin filter in the recovery cylinder 26 is in a filled state, so as to ensure that when the high-sensitive resin in the recovery cylinder 26 is input into the storage cylinder 10, the high-sensitive resin in the storage cylinder 10 and the loading cylinder 11 is always in a filled state, and the high-sensitive resin in the recovery cylinder 26 is input into the storage cylinder 10 through the upward movement of the lifting plate 15 during the next loading.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A light-curing 3D printer, comprising a chassis (1), a cover plate (2) arranged on the chassis (1), a control motor (3) arranged on a side wall of the chassis (1), a slide rail (4) arranged on the side wall of the chassis (1), a bearing block (5) slidably arranged in the slide rail (4), a reciprocating screw (6) arranged at a driving end of the control motor (3), a ball nut arranged on the bearing block (5), and a light-curing slot (7) arranged at the upper end of the chassis (1), characterized in that: It also includes a feeding unit arranged inside the chassis (1), the feeding unit including a feeding component and a recycling component arranged inside the chassis (1); The loading component comprises a bottom plate (8) arranged inside the chassis (1), a support plate (9) arranged at the upper end of the bottom plate (8), a storage barrel (10) arranged above the support plate (9), a loading barrel (11) arranged on the storage barrel (10), a driving motor (12) arranged at the upper end of the bottom plate (8), a threaded rod (13) arranged at the driving end of the driving motor (12), a plurality of stirring rods (14) arranged at the lower end of the threaded rod (13), a lifting plate (15) threadedly arranged at the threaded part of the threaded rod (13), a plurality of connecting pipes (16) arranged on the lifting plate (15), a one-way valve (1) arranged inside the plurality of connecting pipes (16), and a valve (2) disposed on the side wall of the loading barrel (11). A limiting groove (17), limiting blocks arranged at both ends of the lifting plate (15), a matching ring (19) arranged at the upper end of the interior of the loading cylinder (11) and the upper end of the lifting plate (15), a plurality of connecting ropes (20) arranged between the two matching rings (19), a stirring ball (21) arranged on the plurality of connecting ropes (20), a feeding square tube (22) arranged at the upper end of the chassis (1), a feeding port provided on the side wall of the light curing tank (7), and the feeding square tube (22) is connected to the feeding port, and a conveying pipe (23) is arranged between the upper end of the loading cylinder (11) and the lower end of the feeding square tube (22), and the loading cylinder (11) and the feeding square tube (22) are connected through the conveying pipe (23); The ball nut is threadedly connected to the reciprocating screw (6); the lower end of the loading barrel (11) is fixedly connected to the upper end of the storage barrel (10); the interiors of the loading barrel (11) and the storage barrel (10) are respectively divided into a liquid storage chamber, a buffer chamber, a pressurizing chamber and a placement chamber; the threaded rod (13) is sealed and rotatably arranged inside the storage barrel (10) and the loading barrel (11); the length of the thread of the threaded rod (13) is equal to the sum of the lengths of the buffer chamber and the pressurizing chamber; the length of the placement chamber is equal to the sum of the lengths of the two matching rings (19); The plurality of stirring rods (14) are located in the liquid storage cavity, the two limit blocks are slid in the limit grooves (17), the matching ring (19) located at the top is fixedly connected to the upper end of the threaded rod (13), the matching ring (19) located at the bottom is rotatably mounted on the lifting plate (15), a sealing ring is fixedly sleeved at the connection between the lifting plate (15) and the threaded rod (13), a one-way valve 2 is fixedly installed inside the feed pipe (23), and the two end openings of the connecting pipe (16) are respectively located at the upper and lower ends of the lifting plate (15).

2. A light-curing 3D printer according to claim 1, characterized in that: The recovery component comprises a mounting plate (24) arranged on the inner side wall of the chassis (1), two arc-shaped brackets (25) arranged on the mounting plate (24), a recovery tube (26) arranged between the two arc-shaped brackets (25), a recovery square tube (27) arranged at the upper end of the chassis (1), liquid flow holes provided on the recovery square tube (27) and the side wall of the light curing tank (7), a recovery tube (28) arranged between the recovery tube (26) and the recovery square tube (27), a long tube (29) arranged between the bottom end of the recovery tube (26) and the side wall of the storage tube (10), and a one-way valve (3) arranged in the long tube (29); the recovery square tube (27) and the light curing tank (7) are fixedly connected through the liquid flow hole; an automatic valve (1) is arranged at the liquid flow hole of the recovery square tube (27); a signal component and a control component are arranged on the side wall of the chassis (1); and a liquid replenishing component is arranged on the side wall of the lower end of the chassis (1).

3. A light-curing 3D printer according to claim 2, characterized in that: The signal component comprises a switch base (30) arranged on the side wall of the chassis (1), an identification switch (31) arranged on the switch base (30), and a trigger rod (32) arranged on the side wall of the bearing block (5); the identification switch (31) is electrically connected to an automatic valve in the recovery square tube (27).

4. A light-curing 3D printer according to claim 3, characterized in that: The control assembly comprises a toothed plate (33) arranged on a side wall of the bearing block (5) away from the trigger rod (32), a rotating shaft (34) arranged on the side wall of the chassis (1), a one-way bearing (35) arranged on one end of the rotating shaft (34), a transmission gear (36) arranged on the outer ring of the one-way bearing (35), a matching wheel (37) arranged on the rotating shaft (34), a protruding rod (38) arranged on the matching wheel (37), a controller (39) arranged on the side wall of the chassis (1), and a trigger button (40) arranged on the controller (39), one end of the trigger button (40) being provided with a chamfer, and the controller (39) being electrically connected to the drive motor (12).

5. A light-curing 3D printer according to claim 4, characterized in that: The identification switch (31) is located above the controller (39), and the bearing block (5) is located between the identification switch (31) and the controller (39).

6. A light-curing 3D printer according to claim 2, characterized in that: The liquid replenishing assembly comprises a liquid adding box (41) arranged on the side wall of the chassis (1), a liquid adding pipe (42) arranged at the upper end of the liquid adding box (41), a short pipe (43) arranged between the liquid adding box (41) and the recovery cylinder (26), an automatic valve 2 arranged inside the short pipe (43), and a liquid level sensor (18) arranged on the recovery cylinder (26), wherein the liquid level sensor (18) is electrically connected to the automatic valve 2 and the identification switch (31), respectively.

7. A light-curing 3D printer according to claim 6, characterized in that: A resin filter is arranged above the inside of the recovery cylinder (26), and a balance pipe is fixedly installed at the upper end of the recovery cylinder (26).

8. A light-curing 3D printer according to claim 7, characterized in that: The volume of the recovery cylinder (26) at the lower end of the resin filter is equal to the volume of the pressurizing chamber.

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