A light-cured build-up molding 3D printing device

Abstract

The application discloses a kind of photocuring accumulation forming 3D printing device, it is related to 3D printing technical field;And the present application includes support framework, built-in framework, top plate, resin pool and bottom plate, the built-in framework is fixedly installed in support framework middle part, top plate is fixedly installed in support framework top, top plate bottom is equipped with ultraviolet laser source, resin pool is fixedly installed in built-in framework middle part, bottom plate is fixedly installed in support framework bottom, built-in framework top is equipped with scraper drive assembly, scraper drive assembly is equipped with resin internal circulation component between bottom plate;The present application is driven by scraper drive assembly and resin internal circulation component, so that scraper drive assembly drives scraper intermittent transverse reciprocating movement, while discharging equal amount of circulating resin solution to resin pool middle part by resin internal circulation component from resin pool bottom extraction quantitative resin solution, so that the generation of bubble, precipitate and other defects is significantly reduced, and the quality of 3D printing is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of 3D printing technology, in particular to a light-curing accumulation forming 3D printing device. BACKGROUND

[0002] The light-curing accumulation forming is a common 3D printing technology, which uses liquid photosensitive resin and ultraviolet light, laser or light source to solidify materials layer by layer to create three-dimensional objects. The light-curing accumulation forming 3D printing is usually divided into two types: up-pulling type and sinking type. In the sinking type 3D printing device, the liquid resin is located in a container, and the light source irradiates from above to make the resin solidify layer by layer. After the solidification of each layer is completed, the platform will be lowered by a layer thickness, and then the next layer of solidification will be carried out. In this way, the platform is lowered, and the resin on the platform is scraped and leveled by a scraper to form a uniform layer.

[0003] In the light-curing accumulation forming 3D printing technology, the manufacturing of parts is realized by solidifying the resin layer by layer. Generally, the printed parts need to undergo a resin solidification process of 2000 to 3000 layers. The solidification time of each layer may be several seconds to tens of seconds. The printing device takes a long time, and the resin in the molten pool will be stratified and precipitated after a long time of standing, which will affect the uniformity of the subsequent printing layer and the strength and quality of the model. Therefore, a resin material circulating device needs to be designed to improve the fluidity of the resin material. In addition, there is resin residue in the circulating device after use, which will solidify and block the circulating device if not cleaned in time, affecting the normal operation. Therefore, a new resin material circulating device is urgently needed to solve the above problems. In view of the above problems, the application provides a light-curing accumulation forming 3D printing device to solve the above problems. SUMMARY

[0004] In order to solve the problems of stratified precipitation of resin after a long time of standing and internal cleaning of the circulating device, the application aims to provide a light-curing accumulation forming 3D printing device.

[0005] To solve the above technical problems, the application adopts the following technical scheme: a light-curing accumulation forming 3D printing device, comprising a support framework, an internal framework, a top plate, a resin pool and a bottom plate, the internal framework is fixedly installed in the middle of the support framework, the top plate is fixedly installed at the top of the support framework, the bottom of the top plate is provided with an ultraviolet laser source, the resin pool is fixedly installed in the middle of the internal framework, the bottom plate is fixedly installed at the bottom of the support framework, the top of the internal framework is provided with a scraper driving assembly, the scraper driving assembly and the bottom plate are provided with a resin internal circulating assembly, the top of the bottom plate is provided with a cleaning pipe adjusting assembly which is used in cooperation with the resin internal circulating assembly, and the top of the internal framework is provided with a lifting platform assembly.

[0006] The resin internal circulation assembly comprises a first cylinder and a second cylinder which are symmetrically distributed, a first piston is slidably arranged on the inner wall of the first cylinder, a second piston is slidably arranged on the inner wall of the second cylinder, a connecting rod is rotatably arranged at the bottom end of the first piston and the second piston, a rotating arm is rotatably connected to the top of the connecting rod, a liquid inlet pipe is connected through the bottom end of the resin pool, and a one-way valve is connected through between the liquid inlet pipe and the first cylinder and between the first cylinder and the second cylinder.

[0007] The cleaning pipeline adjusting assembly comprises an adjusting bin, the adjusting bin is fixedly installed on the top of the bottom plate near the second cylinder, a sliding rod is inserted through the side of the adjusting bin near the second cylinder, a valve core is fixedly arranged at the end of the sliding rod, a first control piston and a second control piston are fixedly sleeved at the two ends of the valve core, a spring is fixedly arranged at the end of the valve core away from the sliding rod, and the other end of the spring is fixedly connected with the inner wall of the adjusting bin.

[0008] Preferably, the scraper driving assembly comprises two symmetrically distributed side plates, the two side plates are fixedly installed at the top of the built-in framework and located on both sides of the resin pool, a sliding block is slidably arranged at the top of each side plate, a connecting plate is fixedly arranged at the top of each sliding block, a scraper is fixedly arranged between the two connecting plates, a guide plate is fixedly arranged at the top of the left connecting plate, a rotating shaft is rotatably arranged between the built-in framework and the bottom plate near the guide plate, the rotating arm is fixedly installed at the end of the rotating shaft away from the guide plate, two symmetrically distributed swing rods are fixedly sleeved on the outer wall of the rotating shaft, the length of the outer swing rod is greater than that of the inner swing rod, a fixed rod is fixedly arranged between the two swing rods, a guide pin is arranged at the end of the outer swing rod, the guide pin slides in the vertical groove of the guide plate, a sliding rail is fixedly arranged at the top of each side plate, each sliding block slides in the corresponding sliding rail, a bearing seat is fixedly arranged on the side of the support framework near the swing rod, the rotating shaft is rotatably installed on the bearing seat, a motor bracket is fixedly arranged on the side of the built-in framework near the swing rod, a first motor is fixedly arranged on the motor bracket, a rotating disc is fixedly arranged at the driving end of the first motor, a cylindrical sliding frame is slidably sleeved on the outer wall of the fixed rod, a circular groove is formed in one side of the rotating disc, and the cylindrical sliding frame can slide along the inner wall of the circular groove in the circular groove of the rotating disc.

[0009] Preferably, the lifting platform assembly comprises a fixed frame and a lead screw, the fixed frame is fixedly installed at the top of the built-in framework, the lead screw is rotatably installed in the middle of the fixed frame, a stud is threadedly sleeved on the outer wall of the lead screw, a lifting table is slidably arranged in the fixed frame, and the stud is fixedly installed in the middle of the lifting table, two symmetrically distributed fixed columns are fixedly arranged at the bottom end of the side of the lifting table near the resin pool, a printing platform is fixedly arranged at the bottom end of the fixed column, two symmetrically distributed lifting rails are fixedly arranged on the inner wall of the fixed frame, the lifting table slides on the lifting rails, a second motor is fixedly arranged at the middle of the bottom end of the fixed frame, and the driving end of the second motor is fixedly connected with the lead screw.

[0010] Preferably, three circular cavities with same diameter are arranged in the adjusting bin along the axial direction of the valve core, the three circular cavities are mutually penetrated, a connecting pipe is connected through the middle cavity, a one-way valve is connected through between the connecting pipe and the second cylinder, a shunt pipe is connected through at the bottom of the cavity on the side of the slide rod, the shunt pipe is connected through at both ends and the middle of the resin pool, a liquid discharge pipe is connected through at the bottom of the cavity on the side of the spring, the liquid discharge pipe is fixedly installed on the support framework, an electric cylinder is fixedly arranged at the top of the bottom plate and close to the side of the slide rod, and the driving end of the electric cylinder is fixedly connected with the slide rod.

[0011] Preferably, the one-way valve between the liquid inlet pipe and the first cylinder allows liquid to flow from the liquid inlet pipe to the first cylinder, the one-way valve between the first cylinder and the second cylinder allows liquid to flow from the first cylinder to the second cylinder, and the one-way valve between the second cylinder and the connecting pipe allows liquid to flow from the second cylinder to the connecting pipe.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1、The scraper driving assembly and the resin internal circulation assembly are arranged, so that in the process of the intermittent transverse reciprocating movement of the scraper driving assembly, the scraper driving assembly drives the scraper to move, the resin internal circulation assembly extracts a certain amount of resin solution from the bottom of the resin pool and discharges an equal amount of circulated resin solution into the middle of the resin pool at the same time, the scraping and the resin solution circulation are cooperated with each other, the generation of bubbles, precipitates and other defects is significantly reduced, and the quality of 3D printing is greatly improved.

[0014] 2、The cleaning pipeline adjusting assembly is arranged, the connecting pipe is connected through with the shunt pipe and the liquid discharge pipe through the cleaning adjusting assembly, so that the solution in the resin pool is controlled to circulate or be discharged, and after printing is completed, the cleaning liquid is circulated in the resin bin, the resin remaining in the resin pool and the circulation device can be effectively cleaned, the corrosion and blockage of the equipment are reduced, the service life of the equipment is prolonged, and the maintenance cost of the equipment is reduced.

[0015] 3、The scraper driving assembly and the resin internal circulation assembly are arranged, so that the intermittent transverse reciprocating movement of the scraper driving assembly is converted into the intermittent reciprocating swing of the resin internal circulation assembly, a special driving source is not needed to drive the resin internal circulation assembly, the motor, the controller and other related driving components are reduced, the overall structure is simplified, and the manufacturing and maintenance costs of the equipment are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0017] Figure 1 The whole structure schematic diagram of the present application;

[0018] Figure 2 The explosion structure schematic diagram of the built-in skeleton, resin pool and scraper driving assembly in the present application;

[0019] Figure 3 The structure schematic diagram of the lifting platform assembly in the present application;

[0020] Figure 4 The structure schematic diagram of the scraper driving assembly in the present application;

[0021] Figure 5 The sectional structure schematic diagram of the resin pool in the present application;

[0022] Figure 6 The structure schematic diagram of the resin inner circulation assembly in the present application;

[0023] Figure 7 The structure schematic diagram of the cleaning pipeline adjusting assembly in the present application;

[0024] Figure 8 The structure schematic diagram of the whole connection of the resin inner circulation assembly and the cleaning pipeline adjusting assembly in the present application.

[0025] In the diagram: 1. Support frame; 2. Internal frame; 3. Top plate; 4. Resin tank; 5. Bottom plate; 6. Scraper drive assembly; 601. Side plate; 602. Slide rail; 603. Slider; 604. Connecting plate; 605. Scraper; 606. Guide plate; 607. Bearing seat; 608. Rotating shaft; 609. Swing rod; 610. Fixing rod; 611. Motor bracket; 612. Motor No. 1; 613. Rotating disk; 614. Columnar sliding frame; 7. Resin internal circulation assembly; 701. Cylinder No. 1; 702. Cylinder No. 2; 703. Piston No. 1; 704. Piston No. 2; 705. Rotating arm; 706. Connecting rod; 707. One-way valve; 708. Inlet pipe; 709. Connecting pipe; 8. Cleaning pipe adjustment assembly; 801. Adjustment chamber; 802. Slide rod; 803. Valve core; 804. Control piston No. 1; 805. Control piston No. 2; 806. Spring; 807. Diverter pipe; 808. Drain pipe; 809. Electric cylinder; 9. Lifting platform assembly; 901. Fixed frame; 902. Lead screw; 903. Stud; 904. Lifting platform; 905. Fixed column; 906. Printing platform; 907. Motor No. 2; 908. Lifting guide rail. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example: Figures 1-8 As shown, the present invention provides a technical solution: a photopolymerization deposition modeling 3D printing device, including a support frame 1, an inner frame 2, a top plate 3, a resin tank 4, and a bottom plate 5. The inner frame 2 is fixedly installed in the middle of the support frame 1, the top plate 3 is fixedly installed on the top of the support frame 1, and an ultraviolet laser source is provided at the bottom of the top plate 3. The resin tank 4 is fixedly installed in the middle of the inner frame 2, and the bottom plate 5 is fixedly installed at the bottom of the support frame 1. A scraper drive assembly 6 is provided on the top of the inner frame 2, and a resin internal circulation assembly 7 is provided between the scraper drive assembly 6 and the bottom plate 5. A cleaning pipe adjustment assembly 8 is provided on the top of the bottom plate 5 to cooperate with the resin internal circulation assembly 7. A lifting platform assembly 9 is provided on the top of the inner frame 2.

[0028] The resin inner circulation assembly 7 comprises a first cylinder 701 and a second cylinder 702 which are symmetrically distributed, a first piston 703 is slidably arranged on the inner wall of the first cylinder 701, a second piston 704 is slidably arranged on the inner wall of the second cylinder 702, the bottom end of the first piston 703 and the bottom end of the second piston 704 are rotatably provided with a connecting rod 706, the top of the connecting rod 706 is rotatably connected with a rotating arm 705, the bottom end of the resin pool 4 is throughly connected with a liquid inlet pipe 708, and the liquid inlet pipe 708 is throughly connected with the first cylinder 701 and the second cylinder 702, and a one-way valve 707 is arranged between the liquid inlet pipe 708 and the first cylinder 701 and between the first cylinder 701 and the second cylinder 702.

[0029] The cleaning pipe adjusting assembly 8 comprises an adjusting bin 801, the adjusting bin 801 is fixedly installed on the top of the bottom plate 5 and close to the second cylinder 702, a sliding rod 802 is throughly arranged on the side of the adjusting bin 801 close to the second cylinder 702, a valve core 803 is fixedly arranged on the end of the sliding rod 802, a first control piston 804 and a second control piston 805 are respectively fixedly sleeved on the two ends of the valve core 803, a spring 806 is fixedly arranged on the end of the valve core 803 away from the sliding rod 802, and the other end of the spring 806 is fixedly connected with the inner wall of the adjusting bin 801.

[0030] Through the above technical scheme, the resin in the resin pool 4 is circulated, the stratification or precipitation of the resin is effectively prevented, the printing quality is improved, the resin in the circulation process is easily discharged through the adjustment of the first control piston 804 and the second control piston 805, the cleaning liquid in the resin pool 4 is easily discharged after being circulated in the cleaning process, and the cleaning efficiency is improved.

[0031] The scraper driving assembly 6 comprises two symmetrically distributed side plates 601, the two side plates 601 are respectively fixedly installed on the top of the built-in framework 2 and located on the two sides of the resin pool 4, a sliding block 603 is slidably arranged on the top of each side plate 601, a connecting plate 604 is fixedly arranged on the top of each sliding block 603, a scraper 605 is fixedly arranged between the two connecting plates 604, a guide plate 606 is fixedly arranged on the top of the left connecting plate 604, a rotating shaft 608 is rotatably arranged between the built-in framework 2 and the bottom plate 5 and close to the guide plate 606, the rotating arm 705 is fixedly installed on the end of the rotating shaft 608 away from the guide plate 606, two symmetrically distributed swing rods 609 are fixedly sleeved on the outer wall of the rotating shaft 608, the length of the outer swing rod 609 is greater than the length of the inner swing rod 609, a fixed rod 610 is fixedly arranged between the two swing rods 609, a guide pin is arranged on the end of the outer swing rod 609, and the guide pin slides in the vertical slot of the guide plate 606.

[0032] Through the above technical scheme, the scraper 605 reciprocally moves to perform the flattening treatment on the resin on the surface of the resin pool 4.

[0033] The lifting platform assembly 9 comprises a fixed frame 901 and a lead screw 902, the fixed frame 901 is fixedly installed at the middle part of the top end of the built-in framework 2, the lead screw 902 is rotatably installed at the middle part of the fixed frame 901, the outer wall of the lead screw 902 is threadedly sleeved with a stud 903, the fixed frame 901 is slidably provided with a lifting platform 904, and the stud 903 is fixedly installed at the middle part of the lifting platform 904, two symmetrical fixed columns 905 are fixedly arranged at the bottom end of the side of the lifting platform 904 close to the resin pool 4, and a printing platform 906 is fixedly arranged at the bottom end of the fixed column 905.

[0034] According to the above technical scheme, the printing platform 906 is adjusted in lifting according to the design requirement, and the smooth printing process is ensured.

[0035] Three circular cavities with the same diameter are arranged in the adjusting bin 801 along the axial direction of the valve core 803, and the three circular cavities are mutually penetrated, a connecting pipe 709 is connected through the middle cavity, a one-way valve 707 is connected through between the connecting pipe 709 and the second cylinder barrel 702, a shunt pipe 807 is connected through at the bottom of the cavity on one side of the sliding rod 802, and the two ends of the shunt pipe 807 are connected through the middle part of the resin pool 4, a liquid discharge pipe 808 is connected through at the bottom of the cavity on one side of the spring 806, and the liquid discharge pipe 808 is fixedly installed on the support framework 1.

[0036] According to the above technical scheme, the connecting pipe 709, the shunt pipe 807 and the liquid discharge pipe 808 are respectively connected through the corresponding cavities in the adjusting bin 801.

[0037] The support framework 1 is fixedly provided with a bearing seat 607 on the side close to the swing rod 609, and the rotating shaft 608 is rotatably installed on the bearing seat 607.

[0038] According to the above technical scheme, the rotating shaft 608 is rotatably installed on the bearing seat 607, so that the stability of the rotating shaft 608 during rotation is ensured.

[0039] The built-in framework 2 is fixedly provided with a motor support 611 on the side close to the swing rod 609 at the bottom end, the motor support 611 is fixedly provided with a first motor 612, the driving end of the first motor 612 is fixedly provided with a rotating disc 613, a cylindrical sliding frame 614 is slidably sleeved on the outer wall of the fixed rod 610, a circular groove is formed on one side of the rotating disc 613, and the cylindrical sliding frame 614 can slide along the inner wall of the circular groove in the rotating disc 613.

[0040] According to the above technical scheme, the first motor 612 drives the rotating disc 613 to rotate, and the cylindrical sliding frame 614 can slide on the outer wall of the fixed rod 610 during rotation of the rotating disc 613.

[0041] The bottom plate 5 is fixed with an electric cylinder 809 at the top end near one side of the sliding rod 802, and the driving end of the electric cylinder 809 is fixedly connected with the sliding rod 802.

[0042] Through the above technical scheme, the electric cylinder 809 pushes the sliding rod 802 to move.

[0043] The one-way valve 707 between the liquid inlet pipe 708 and the first cylinder 701 allows the liquid to flow from the liquid inlet pipe 708 to the first cylinder 701, the one-way valve 707 between the first cylinder 701 and the second cylinder 702 allows the liquid to flow from the first cylinder 701 to the second cylinder 702, and the one-way valve 707 between the second cylinder 702 and the connecting pipe 709 allows the liquid to flow from the second cylinder 702 to the connecting pipe 709.

[0044] Through the above technical scheme, by setting three one-way valves 707, the resin in the first cylinder 701 is prevented from flowing back to the resin pool 4, the resin in the second cylinder 702 is prevented from flowing back to the first cylinder 701, and the resin in the connecting pipe 709 and the adjusting bin 801 is prevented from flowing back to the second cylinder 702.

[0045] The top end of each of the two side plates 601 is fixedly provided with a sliding rail 602, and the two sliding blocks 603 slide in the corresponding sliding rails 602, respectively.

[0046] Through the above technical scheme, the sliding block 603 moves under the guidance of the sliding rail 602.

[0047] The inner wall of the fixed frame 901 is fixedly provided with two symmetrically distributed lifting rails 908, and the lifting platform 904 slides on the lifting rails 908, the bottom end of the fixed frame 901 is fixedly provided with a second motor 907, and the driving end of the second motor 907 is fixedly connected with the lead screw 902.

[0048] Through the above technical scheme, the lifting platform 904 moves up and down under the guidance of the lifting rails 908.

[0049] Working principle: first, pour the light-cured resin into the resin pool 4, like Figure 3As shown, the control No. 2 motor 907 drives the screw 902 to rotate forward, the screw 902 drives the printing platform 906 to rise to the printing corresponding position under the guidance of the lifting guide rail 908 through the stud 903, the lifting platform 904 and the fixed column 905, and then the light curing resin is cured by irradiation of the ultraviolet light source. After each irradiation of the ultraviolet light source, the control screw 902 is reversed to drive the printing platform 906 to move downward according to the set height of a single layer thickness, while the No. 1 motor 612 is controlled to rotate half a circle. The No. 1 motor 612 rotates through the rotating disc 613, the cylindrical sliding frame 614 and the fixed rod 610 to drive the swing rod 609 to swing along the predetermined arc-shaped track from one limit position to the other limit position with the rotating shaft 608 as the axis. The swing rod 609 drives the scraper 605 to move to the other limit position under the guidance of the sliding rail 602 through the guide plate 606 during the swinging process, and the resin layer is leveled for the next irradiation. In this process, the swing rod 609 swings while driving the rotating shaft 608 to rotate counterclockwise. The rotating shaft 608 rotates through the two connecting rods 706 to drive the No. 1 piston 703 to lift upward while making the No. 2 piston 704 to descend. The lifting of the No. 1 piston 703 reduces the pressure in the No. 1 cylinder 701, thereby forcing the light curing resin in the resin pool 4 to be pressed into the No. 1 cylinder 701 through the liquid inlet pipe 708 and the one-way valve 707. The descent of the No. 2 piston 704 increases the pressure in the No. 2 cylinder 702, thereby forcing the light curing resin in the No. 2 cylinder 702 to enter the cavity in the adjusting bin 801 through the one-way valve 707 and the connecting pipe 709. The increase of the pressure in the cavity of the adjusting bin 801 forces the light curing resin in the adjusting bin 801 to flow back to the resin pool 4 through the two ends of the shunt pipe 807;

[0050] When the next ultraviolet light source irradiation and curing is completed, the No. 1 motor 612 drives the rotating disc 613 to continue to rotate half a circle. The rotating disc 613 drives the swing rod 609 and the scraper 605 to return to the initial position according to the above synchronous steps. In this process, the swing rod 609 drives the rotating arm 705 to rotate to the initial position. At this time, the rotating arm 705 drives the No. 1 piston 703 to descend while making the No. 2 piston 704 to lift through the two connecting rods 706, and the pressure between the No. 1 cylinder 701 and the No. 2 cylinder 702 is balanced, thereby forcing the light curing resin in the No. 1 cylinder 701 to enter the No. 2 cylinder 702 through the one-way valve 707. Thus, the light curing resin circulation is completed, and the printing is performed by reciprocating circulation;

[0051] When the printing is completed and the light curing resin needs to be discharged, as shown in FIG. 9, the control No. 2 motor 907 drives the screw 902 to rotate in the reverse direction, and the screw 902 drives the printing platform 906 to move downward under the guidance of the lifting guide rail 908 through the stud 903, the lifting platform 904 and the fixed column 905. The light curing resin in the No. 2 cylinder 702 is forced to enter the adjusting bin 801 through the one-way valve 707 and the connecting pipe 709, and the light curing resin in the adjusting bin 801 is forced to flow back to the resin pool 4 through the two ends of the shunt pipe 807. The light curing resin in the No. 1 cylinder 701 is forced to enter the No. 2 cylinder 702 through the one-way valve 707, and the light curing resin in the No. 2 cylinder 702 is forced to enter the adjusting bin 801 through the one-way valve 707 and the connecting pipe 709. The light curing resin in the adjusting bin 801 is forced to flow back to the resin pool 4 through the two ends of the shunt pipe 807. Thus, the light curing resin is discharged from the system. Figure 7As shown, the driving end of the control cylinder 809 is extended, the cylinder 809 drives the first control piston 804 and the second control piston 805 to move through the slide rod 802 and the valve core 803, and the spring 806 is pressed, so that the first control piston 804 blocks the through cavity on one side of the shunt pipe 807, and the second control piston 805 slides out of the through cavity of the liquid discharge pipe 808. According to the above synchronous steps, the first motor 612 is controlled to rotate continuously to circulate the light-curing resin, and the light-curing resin in the adjusting bin 801 is discharged from the liquid discharge pipe 808. After the light-curing resin is discharged, the inside of the circulating assembly needs to be cleaned. The cleaning liquid is poured into the resin pool 4 to clean the inner wall of the resin pool 4. The cleaned cleaning liquid is collected in the resin pool 4. After cleaning, the driving end of the control cylinder 809 is controlled to retract to make the connecting pipe 709 communicate with the shunt pipe 807, so that the cleaning liquid circulates in the first cylinder barrel 701, the second cylinder barrel 702, the adjusting bin 801 and the resin pool 4 to clean the inside. After the circulation is completed, the driving end of the control cylinder 809 is controlled to extend to make the connecting pipe 709 communicate with the liquid discharge pipe 808, and the cleaning liquid is discharged by circulation.

[0052] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A light-cured build-up forming 3D printing device comprising a support skeleton (1), an embedded skeleton (2), a resin pool (4) and a bottom plate (5), characterized in that: The built-in skeleton (2) is fixedly installed in the middle of the support skeleton (1), the resin pool (4) is fixedly installed in the middle of the built-in skeleton (2), the bottom plate (5) is fixedly installed at the bottom of the support skeleton (1), the built-in skeleton (2) is provided with a scraper driving assembly (6) at the top, the resin inner circulation assembly (7) is arranged between the scraper driving assembly (6) and the bottom plate (5), and the cleaning pipeline adjusting assembly (8) is arranged at the top of the bottom plate (5); The resin inner circulation assembly (7) comprises a first cylinder (701) and a second cylinder (702) for driving resin circulation, and the first cylinder (701) and the second cylinder (702) are slidably provided with a first piston (703) and a second piston (704) on the inner walls thereof; The cleaning pipeline adjusting assembly (8) comprises an adjusting bin (801), the adjusting bin (801) is fixedly installed at the top end of the bottom plate (5) and close to one side of the second cylinder (702), a slide rod (802) is penetratingly arranged at the side of the adjusting bin (801) close to the second cylinder (702), a valve core (803) is fixedly arranged at the end of the slide rod (802), and a first control piston (804) and a second control piston (805) are fixedly sleeved at the two ends of the valve core (803); the first piston (703) and the second piston (704) are rotatably provided with a connecting rod (706) at the bottom ends thereof, the connecting rod (706) is rotatably connected with a rotating arm (705) at the top, a liquid inlet pipe (708) is penetratingly connected at the bottom end of the resin pool (4), and a one-way valve (707) is penetratingly connected between the liquid inlet pipe (708) and the first cylinder (701) and between the first cylinder (701) and the second cylinder (702); The scraper driving assembly (6) comprises two symmetrically distributed side plates (601), the two side plates (601) are fixedly installed at the top end of the built-in skeleton (2) and located on the two sides of the resin pool (4), the top end of each side plate (601) is slidably provided with a sliding block (603), the top end of each sliding block (603) is fixedly provided with a connecting plate (604), the two connecting plates (604) are fixedly provided with a scraper plate (605) between them, and a guide plate (606) is fixedly arranged at the top end of the left connecting plate (604); A rotating shaft (608) is rotatably arranged between the built-in skeleton (2) and the bottom plate (5) and close to the guide plate (606), the rotating arm (705) is fixedly installed at the end of the rotating shaft (608) away from the guide plate (606), the outer wall of the rotating shaft (608) is fixedly sleeved with two symmetrically distributed swing rods (609), the length of the outer swing rod (609) is greater than that of the inner swing rod (609), a fixed rod (610) is fixedly arranged between the two swing rods (609), a guide pin is arranged at the end of the outer swing rod (609), and the guide pin slides in the corresponding vertical slot of the guide plate (606). The inner built framework (2) is provided with a lifting platform assembly (9) on the top, the lifting platform assembly (9) comprises a fixed frame (901) and a lead screw (902), the fixed frame (901) is fixedly installed at the middle of the top end of the inner built framework (2), the lead screw (902) is rotatably installed at the middle of the fixed frame (901), the outer wall of the lead screw (902) is threadedly sleeved with a stud (903), the fixed frame (901) is slidably provided with a lifting platform (904), and the stud (903) is fixedly installed at the middle of the lifting platform (904); two fixed columns (905) are fixedly arranged at the bottom end of the side of the lifting platform (904) close to the resin pool (4) and are symmetrically distributed; and the printing platform (906) is fixedly arranged at the bottom end of the fixed column (905). The valve core (803) is fixedly provided with a spring (806) at the end away from the sliding rod (802), and the other end of the spring (806) is fixedly connected with the inner wall of the adjusting bin (801). Three circular cavities with the same diameter are formed in the adjusting bin (801) along the axial direction of the valve core (803), the three circular cavities are mutually penetrated, the middle cavity is penetrated and connected with a connecting pipe (709), a one-way valve (707) is penetrated and connected between the connecting pipe (709) and the second cylinder barrel (702), a shunt pipe (807) is penetrated and connected at the bottom of the cavity on the side of the sliding rod (802), the shunt pipe (807) is penetrated and connected with the middle part of the resin pool (4) at both ends, a liquid discharge pipe (808) is penetrated and connected at the bottom of the cavity on the side of the spring (806), and the liquid discharge pipe (808) is fixedly installed on the support framework (1); The top end of each of the two side plates (601) is fixedly provided with a sliding rail (602), and the two sliding blocks (603) are slidably arranged in the corresponding sliding rails (602). The support framework (1) is fixedly provided with a bearing seat (607) on the side close to the swing rod (609), and the rotating shaft (608) is rotatably installed on the bearing seat (607). The bottom end of the inner built framework (2) is fixedly provided with a motor support (611) on the side close to the swing rod (609), the motor support (611) is fixedly provided with a first motor (612), the driving end of the first motor (612) is fixedly provided with a rotating disc (613), the outer wall of the fixed rod (610) is slidably sleeved with a cylindrical sliding frame (614), a circular groove is formed in the side of the rotating disc (613), and the cylindrical sliding frame (614) can slide along the inner wall of the circular groove in the rotating disc (613).

2. The light solidification additive manufacturing 3D printing device according to claim 1, wherein, The top end of the bottom plate (5) is fixedly provided with an electric cylinder (809) on the side close to the sliding rod (802), and the driving end of the electric cylinder (809) is fixedly connected with the sliding rod (802).

3. The light solidification additive manufacturing 3D printing device of claim 1, wherein, The one-way valve (707) between the liquid inlet pipe (708) and the first cylinder (701) allows liquid to flow from the liquid inlet pipe (708) to the first cylinder (701), the one-way valve (707) between the first cylinder (701) and the second cylinder (702) allows liquid to flow from the first cylinder (701) to the second cylinder (702), and the one-way valve (707) between the second cylinder (702) and the connecting pipe (709) allows liquid to flow from the second cylinder (702) to the connecting pipe (709).

4. The light solidification build-up molding 3D printing device according to claim 1, wherein Two symmetrical lifting guide rails (908) are fixedly arranged on the inner wall of the fixed frame (901), and the lifting table (904) slides on the lifting guide rails (908); a second motor (907) is fixedly arranged at the bottom end of the fixed frame (901), and the driving end of the second motor (907) is fixedly connected with the lead screw (902).

5. The light solidification build-up molding 3D printing device according to claim 1, wherein The support framework (1) is fixedly installed with a top plate (3) at the top, and the top plate (3) is provided with an ultraviolet laser source at the bottom.

Images