Elastomer 3D printing resin recycling mechanism, 3D printing device and 3D printing process

Abstract

The invention discloses an elastomer 3D printing resin recycling mechanism, a 3D printing device and a 3D printing technology.The elastomer 3D printing resin recycling mechanism comprises a resin groove formed in a 3D printer body, a resin tank and a liquid pump, the resin tank and the liquid pump are arranged in the 3D printer body, a liquid inlet pipe is arranged at a liquid inlet of the resin groove, and an electromagnetic valve B is arranged on the liquid inlet pipe; a liquid return pipe is arranged at a liquid return opening of the resin tank, an electromagnetic valve A is arranged on the liquid return pipe, a liquid outlet of the resin tank, the liquid pump and the electromagnetic valve B are connected through a hose, and a liquid inlet of the resin tank and the electromagnetic valve A are connected through a hose. The device has the advantages that the liquid photosensitive resin can automatically flow, and the liquid photosensitive resin can be used and recycled more quickly and efficiently.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing technology, and in particular to an elastomer 3D printing resin recovery mechanism, a 3D printing device, and a 3D printing process. Background Art

[0002] 3D printing is a technology that creates three-dimensional objects by stacking materials layer by layer. A stereolithography 3D printer is an additive manufacturing device that uses ultraviolet light to cure liquid photosensitive resin.

[0003] The light-curing 3D printer includes a light source system, resin tank, build platform, optical and motion control system, mechanical structure, electronic control system, auxiliary system, software and interface;

[0004] Light source systems are divided into laser, DLP projector and LCD mask according to different technologies;

[0005] The resin tank has a transparent bottom that allows UV light to penetrate and is used to hold liquid photosensitive resin;

[0006] The build platform includes a Z-axis lift mechanism and a leveling system;

[0007] The optical and motion control system includes a galvanometer system to control the DLP / LCD optical path;

[0008] The mechanical structure includes the frame, guide rails, transmission structure, and housing;

[0009] The electronic control system includes a main control board, a power module and sensors.

[0010] Existing light-curing 3D printers use liquid photosensitive resin as the material for printing. The liquid photosensitive resin after printing remains in the resin tank. This part of the liquid photosensitive resin can be used again. The staff needs to remove the resin tank and pour the liquid photosensitive resin remaining in the resin tank into the resin tank for next use. Pouring out and recycling the liquid photosensitive resin takes a certain amount of time, which also increases the workload of the staff.

[0011] In view of this, we propose an elastomer 3D printing resin recovery mechanism, a 3D printing device and a 3D printing process. Summary of the Invention

[0012] The purpose of the present invention is to provide an elastomer 3D printing resin recovery mechanism, a 3D printing device and a 3D printing process to solve the problems raised in the above background technology.

[0013] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an elastomer 3D printing resin recovery mechanism, comprising a resin tank provided on a 3D printer body, a resin tank and a liquid pump provided inside the 3D printer body, a liquid inlet pipe provided at the liquid inlet of the resin tank, a solenoid valve B provided on the liquid inlet pipe, a liquid return pipe provided at the liquid return port of the resin tank, a solenoid valve A provided on the liquid return pipe, the liquid inlet pipe and the liquid return pipe respectively passing through holes on the 3D printer body housing, the aperture of the hole on the 3D printer body housing is larger than the diameters of the liquid inlet pipe and the liquid return pipe, the solenoid valve B and the solenoid valve A are both located inside the 3D printer body, and the resin tank liquid outlet, the liquid pump and the solenoid valve B, and the resin tank liquid inlet and the solenoid valve A are respectively connected by hoses.

[0014] Preferably, a support structure is provided in the body of the 3D printer, and the support structure includes a plurality of columns, and an arc-shaped plate A is fixed to the top of each of the plurality of columns, and a fixed block is fixed to each of the plurality of columns, and a connecting rod is passed through each of the plurality of fixing blocks, and an arc-shaped plate B is fixed to the top of each of the plurality of connecting rods, and a single arc-shaped plate B and a single arc-shaped plate A cooperate to form a semi-arc plate for supporting the resin tank, and a cross plate is connected to the bottom end of each of the plurality of connecting rods, and the bottom ends of each of the plurality of connecting rods are fixedly connected to a cross plate, and a spring A is provided between the fixed block and the arc-shaped plate B, and the spring A is sleeved on the connecting rod, and the two ends of the spring A are fixedly connected to the fixed block and the arc-shaped plate B respectively.

[0015] Preferably, one side of the resin tank is connected to the housing of the 3D printer body via a rotating structure, wherein the rotating structure includes a connecting block A, two connecting blocks A are symmetrically fixedly arranged on one side of the resin tank, and a connecting block B is fixedly arranged on the housing of the 3D printer body, and both ends of the connecting block B are rotatably connected to the two connecting blocks A via rotating shafts;

[0016] The other side of the resin tank is connected to the outer shell of the 3D printer body through a pushing structure. The pushing structure includes an electric push rod. The base of the electric push rod is rotatably connected to the outer shell of the 3D printer body through a universal joint B. The push rod end of the electric push rod is rotatably connected to the other side of the resin tank through a universal joint A.

[0017] Preferably, the inner bottom wall corresponding to the liquid return port of the resin tank is provided with two opposing inclined surfaces, and the lower ends of the two inclined surfaces correspond to the liquid return port.

[0018] Preferably, the liquid outlet and liquid inlet of the resin tank are both provided with a connecting structure, and the connecting structure includes a connecting pipe, the end of the connecting pipe is connected to the corresponding hose, and a threaded sleeve is threadedly sleeved on the connecting pipe, and the threaded sleeve is divided into inner and outer holes, the inner hole diameter of the threaded sleeve is smaller than the outer hole diameter, and the thread of the inner hole ring wall of the threaded sleeve is threadedly connected to the thread groove of the outer ring wall of the connecting pipe. The outer walls of the liquid outlet and liquid inlet of the resin tank are both fixed with threaded pipes, and the connecting pipe is inserted into and matched with the threaded pipe, and the thread of the outer ring wall of the threaded pipe is threadedly connected to the thread groove of the outer hole ring wall of the threaded sleeve, and the inner bottom wall of the outer hole of the threaded sleeve is sealed and matched with the end of the threaded pipe through a sealing ring.

[0019] Preferably, the inner walls of the liquid outlet and the liquid inlet of the resin tank are respectively provided with a sealing structure, and the sealing structure includes a guide column and a sealing plate, the two guide columns are symmetrically fixed on the inner wall of the liquid outlet or the liquid inlet of the resin tank, and the two ends of the sealing plate are respectively sleeved on the two guide columns, and the sealing plate is arc-shaped, and the sealing plate contacts and cooperates with the inner walls corresponding to the liquid outlet and the liquid inlet of the resin tank, and the inner ends of the two guide columns are respectively fixed with a limit block, and a spring B is provided between the limit block and the sealing plate, and the spring B is sleeved on the guide column, and the two ends of the spring B are respectively fixedly connected to the limit block and the sealing plate, and a sealing strip is fixed on the sealing plate, and the sealing strip is surrounded by a square frame, and the frame-shaped sealing strip is arranged in an arc shape, and the sealing strip is plugged into the embedded groove opened on the inner wall of the liquid outlet or the liquid inlet of the resin tank, and the sealing plate is pushed and cooperated with the limit column fixed on the insertion end of the connecting pipe.

[0020] Preferably, a limiting groove is provided on the inner wall of the threaded tube, the inner end of the limiting groove is closed and the outer end is open, the limiting column is L-shaped, and the transverse section of the limiting column is inserted into and matched with the limiting groove.

[0021] 3D printing process of the 3D printing device with a resin recovery mechanism:

[0022] S1. Place a resin tank filled with liquid photosensitive resin in the 3D printer body, and connect the liquid outlet and liquid inlet of the resin tank to the two connecting structures respectively;

[0023] S2. Open solenoid valve B, close solenoid valve A, and the liquid pump pumps the liquid photosensitive resin in the resin tank into the resin tank. Then close solenoid valve B and start the 3D printer to perform 3D printing of the elastomer.

[0024] S3. After completing the 3D printing of the elastomer, the other side of the resin tank is lifted by pushing the structure. The resin tank tilts around the rotating structure, solenoid valve A opens, and solenoid valve B is closed. The liquid photosensitive resin in the resin tank flows back into the resin tank from the resin tank return port due to gravity, and then solenoid valve A is closed.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention provides a resin tank, a connecting structure, a resin tank, a liquid pump, a liquid return pipe, a solenoid valve A, a liquid inlet pipe and a solenoid valve B, so that the liquid photosensitive resin can flow automatically, and the use and recovery of the liquid photosensitive resin are faster and more efficient, thereby solving the problem that pouring out and recovering the liquid photosensitive resin requires a certain amount of time and increases the workload of the staff.

[0027] 2. The present invention has the advantages of supporting the resin tank placed in the 3D printer body and facilitating the removal of the resin tank by providing a column, an arc-shaped plate A, a fixed block, an arc-shaped plate B, a spring A, a horizontal plate and a connecting rod, thereby solving the problem that the resin tank is fixed in the 3D printer body and is inconvenient to disassemble and install.

[0028] 3. The present invention has an inclined resin tank by arranging a connecting block A, a connecting block B, a rotating shaft, an electric push rod, a universal shaft A and a universal shaft B. The liquid photosensitive resin in the resin tank flows to the return liquid port of the resin tank for reflux, and the liquid photosensitive resin does not remain in the resin tank, thereby solving the problem of liquid photosensitive resin remaining at the flat bottom of the resin tank.

[0029] 4. The present invention has the advantages of convenient installation or disassembly of the resin tank and improved efficiency by providing a connecting pipe, a threaded sleeve and a threaded pipe.

[0030] 5. The present invention has the advantages of sealing the liquid outlet and liquid inlet of the resin tank by arranging the embedding groove, the sealing plate, the guide column, the spring B, the limit block and the sealing strip, and adaptively opening the liquid outlet and liquid inlet to circulate the liquid photosensitive resin after the resin tank is installed, which has the advantage of easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall structure of the present invention in working state;

[0033] Figure 3 It is a schematic diagram of the body structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the resin recovery structure of the present invention;

[0035] Figure 5 This is a schematic front view of the resin recovery structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection structure and the blocking structure of the present invention;

[0037] Figure 7 For the present invention Figure 6 A magnified schematic diagram of point A;

[0038] Figure 8 This is a schematic cross-sectional view of the resin tank of the present invention;

[0039] Figure 9 Schematic diagram of the blocking structure of the present invention;

[0040] Figure 10 It is a cross-sectional schematic diagram of the connection structure of the present invention;

[0041] Figure 11 It is a schematic diagram of a cross-sectional exploded view of the connection structure of the present invention;

[0042] Figure 12 This is a schematic diagram of the supporting structure in the supporting state of the present invention;

[0043] Figure 13 This is a schematic diagram of the support structure of the present invention in a placed state;

[0044] Figure 14 It is a schematic diagram of the rotation structure of the present invention;

[0045] Figure 15 It is a schematic diagram of the propulsion structure of the present invention.

[0046] In the figure: 100, 3D printer body; 200, resin tank; 300, rotating structure; 400, driving structure; 500, connecting structure; 600, resin tank; 700, supporting structure; 800, liquid pump; 900, liquid return pipe; 1000, solenoid valve A; 1100, liquid inlet pipe; 1200, solenoid valve B; 1400, blocking structure;

[0047] 201. Incline;

[0048] 301, connecting block A; 302, connecting block B; 303, rotating shaft;

[0049] 401, electric push rod; 402, universal joint A; 403, universal joint B;

[0050] 501, connecting pipe; 502, threaded sleeve; 503, threaded pipe; 504, limiting column;

[0051] 5031, limit slot;

[0052] 601, embedded slot;

[0053] 701, column; 702, curved plate A; 703, fixed block; 704, curved plate B; 705, spring A; 706, horizontal plate; 707, connecting rod;

[0054] 1401. Closing plate; 1402. Guide column; 1403. Spring B; 1404. Limit block; 1405. Sealing strip. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] See also Figures 1 to 5The present invention provides an embodiment of an elastomer 3D printing resin recovery mechanism, a 3D printing device, and a 3D printing process, including a resin tank 200 provided on a 3D printer body 100, a resin tank 600 and a liquid pump 800 provided inside the 3D printer body 100, the 3D printer body 100 including a light source system, a building platform, an optical and motion control system, a mechanical structure, an electronic control system, an auxiliary system, software, and an interface, the transparent bottom of the resin tank 200 and the 3D printer body 100 are connected. Corresponding to the light source, a liquid inlet pipe 1100 is provided at the liquid inlet of the resin tank 200, and the liquid inlet pipe 1100 is connected to the inner cavity of the resin tank 200 through the liquid inlet, and a solenoid valve B1200 is provided on the liquid inlet pipe 1100. The solenoid valve B1200 is selected and used by the technicians of this profession according to the actual situation. A liquid return pipe 900 is provided at the liquid return port of the resin tank 200, and the liquid return pipe 900 is connected to the inner cavity of the resin tank 200 through the liquid return port. A solenoid valve A1000 is provided on the liquid return pipe 900, and the solenoid valve A1000 is selected and used by the technicians of this profession according to the actual situation. The technicians can choose to use them according to the actual situation. The liquid inlet pipe 1100 and the liquid return pipe 900 are respectively installed in the holes on the shell of the 3D printer body 100. The diameter of the hole on the shell of the 3D printer body 100 is larger than the diameter of the liquid inlet pipe 1100 and the liquid return pipe 900. When the resin tank 200 is tilted, the liquid inlet pipe 1100 and the liquid return pipe 900 have enough tilting space in the hole on the 3D printer shell. The solenoid valve B1200 and the solenoid valve A1000 are both located in the 3D printer body 100. The solenoid valve B1200 00 and solenoid valve A1000 are tiltable within the 3D printer body 100 along with the liquid inlet pipe 1100 and return pipe 900, allowing ample space. The resin tank 600 is equipped with an inlet port, through which liquid photosensitive resin is added to replenish the liquid photosensitive resin within the tank 600. A sealing plug is provided at the inlet port. Flexible hoses connect the liquid outlet of the resin tank 600, the liquid pump 800, and the solenoid valve B1200, as well as the liquid inlet of the resin tank 600 and the solenoid valve A1000. The resin tank 600, the chamber of the liquid pump 800, the resin tank 200, and multiple flexible hoses are connected in sequence. The inner walls of the chamber through which the liquid photosensitive resin flows are coated with a hyperbranched epoxy resin-based liquid lubricating coating to prevent residual liquid photosensitive resin.When using the 3D printer body 100 to print an elastomer, a resin tank 200 containing liquid photosensitive resin is placed in the 3D printer body 100, and the liquid outlet and liquid inlet of the resin tank 200 are respectively connected to the two connecting structures 500, the solenoid valve B1200 is opened, the solenoid valve A1000 is closed, the liquid pump 800 works to pump the liquid photosensitive resin in the resin tank 600 into the resin tank 200, and then the solenoid valve B1200 is closed, and the 3D printer body 100 is started to perform 3D printing of the elastomer; after completing the 3D printing of the elastomer, the other side of the resin tank 200 is lifted by the pushing structure 400, and the resin tank 200 is tilted around the rotating structure 300 as the axis, and the tilt angle is self-determined. The solenoid valve A1000 is opened, and the solenoid valve B1200 is closed. The liquid photosensitive resin in the resin tank 200 flows back into the resin tank 600 from the liquid return port of the resin tank 200 due to gravity, and then the solenoid valve A1000 is closed.

[0057] The present invention provides a resin tank 200, a connecting structure 500, a resin tank 600, a liquid pump 800, a liquid return pipe 900, a solenoid valve A1000, a liquid inlet pipe 1100 and a solenoid valve B1200, thereby achieving the advantages of self-circulation of liquid photosensitive resin, and faster and more efficient use and recovery of liquid photosensitive resin, thereby solving the problem that pouring out and recovering liquid photosensitive resin requires a certain amount of time and increases the workload of staff.

[0058] See also Figure 4 、 Figure 12 and Figure 13The present invention provides an embodiment of an elastomer 3D printing resin recovery mechanism, wherein a support structure 700 is provided in a 3D printer body 100, and the support structure 700 includes a plurality of columns 701, the bottom ends of the plurality of columns 701 are fixed to the bottom wall of the interior of the 3D printer body 100, and the top ends of the plurality of columns 701 are respectively fixed with an arc plate A702, and the plurality of columns 701 are respectively fixed with a fixing block 703, and the plurality of fixing blocks 703 are respectively penetrated with a connecting rod 707, and the top ends of the plurality of connecting rods 707 are respectively fixed with an arc plate B704, and a single Curved plate B704 and single curved plate A702 cooperate to form a semi-curved plate for supporting resin tank 600. The bottom ends of multiple connecting rods 707 are connected to a horizontal plate 706, and the bottom ends of multiple connecting rods 707 are fixedly connected to a single horizontal plate 706. A spring A705 is provided between fixed block 703 and curved plate B704. Spring A705 is sleeved on connecting rod 707, and the ends of spring A705 are respectively fixedly connected to fixed block 703 and curved plate B704. The elastic coefficient of spring A705 can be selected by technicians in this field according to actual conditions. When the top side of horizontal plate 706 contacts fixed block 703, curved plate B704 and curved plate A702 form a semi-curved plate. When installing the resin tank 600 in the 3D printer body 100, the resin tank 600 filled with liquid photosensitive resin is placed in the 3D printer body 100. The staff pushes the horizontal plate 706 downward by hand, and the connecting rod 707 moves downward relative to the fixed block 703. The curved plate B704 moves downward accordingly, and the spring A705 is further compressed. The resin tank 600 is placed on the curved plate A702. The resin tank 600 contacts the inner wall of the curved plate A702, and the horizontal plate 706 is released. Under the pressure of the spring A705, the resin tank 600 is placed on the curved plate A702. Under the action, the arc plate B704 moves up, and the connecting rod 707 drives the horizontal plate 706 to move up until the top side of the horizontal plate 706 contacts the fixed block 703. At this time, the arc plate B704 and the arc plate A702 form a semi-arc plate to support the resin tank 600, and the hose is connected through the connecting structure 500; when removing the resin tank 600, the staff pushes the horizontal plate 706 downward by hand, and the arc plate B704 moves down and no longer supports the resin tank 600. The resin tank 600 is taken out and the hose is removed through the connecting structure 500.

[0059] The present invention provides a support for a resin tank 600 placed in a 3D printer body 100 and facilitates removal of the resin tank 600 by providing a column 701, an arc-shaped plate A702, a fixed block 703, an arc-shaped plate B704, a spring A705, a horizontal plate 706, and a connecting rod 707. This solves the problem of the resin tank 600 being fixed in the 3D printer body 100 and being difficult to remove and install.

[0060] See also Figure 4 、 Figure 5 、 Figure 14 and Figure 15The present invention provides an embodiment of an elastomer 3D printing resin recovery mechanism, wherein one side of the resin tank 200 is connected to the housing of the 3D printer body 100 through a rotating structure 300, the rotating structure 300 includes a connecting block A301, two connecting blocks A301 are symmetrically fixed on one side of the resin tank 200, and a connecting block B302 is fixed on the housing of the 3D printer body 100, and the two ends of the connecting block B302 are respectively rotatably connected to the two connecting blocks A301 through a rotating shaft 303; the other side of the resin tank 200 is connected to the housing of the 3D printer body 100 through a pushing structure 400, and the pushing structure 400 includes an electric push rod 401, which can be selected and used by technicians in this field according to actual conditions. The base of the electric push rod 401 is rotatably connected to the housing of the 3D printer body 100 through a universal shaft B403, and the push rod end of the electric push rod 401 is rotatably connected to the other side of the resin tank 200 through a universal shaft A402. The inner bottom wall of the resin tank 200, corresponding to the liquid return port, is equipped with two opposing inclined surfaces 201. The lower ends of the two inclined surfaces 201 correspond to the liquid return port, forming an inwardly concave groove at the liquid return port of the resin tank 200, which facilitates the recirculation of the liquid photosensitive resin within the resin tank 200. During the liquid photosensitive resin recovery process, to prevent the liquid photosensitive resin from remaining on the flat bottom of the resin tank 200, the electric push rod 401 gently lifts the other side of the resin tank 200. Connecting block A301 rotates relative to connecting block B302 on one side of the resin tank 200, aligning with the tilting of the resin tank 200. This allows the liquid photosensitive resin within the resin tank 200 to flow back toward the liquid return port of the resin tank 200, preventing any liquid photosensitive resin from remaining within the resin tank 200. After the liquid photosensitive resin is recovered, the electric push rod 401 drives the other side of the resin tank 200 to flatten, ensuring that the resin tank 200 is level.

[0061] The present invention has the advantages of tilting the resin tank 200 by arranging a connecting block A301, a connecting block B302, a rotating shaft 303, an electric push rod 401, a universal shaft A402 and a universal shaft B403, so that the liquid photosensitive resin in the resin tank 200 flows to the return liquid port of the resin tank 200 for reflux, and the liquid photosensitive resin does not remain in the resin tank 200, thereby solving the problem of liquid photosensitive resin remaining on the flat bottom of the resin tank 200.

[0062] See also Figure 6 、 Figure 7 、 Figure 10 and Figure 11, an embodiment provided by the present invention: a 3D printing resin recovery mechanism for elastomers, the liquid outlet and liquid inlet of the resin tank 600 are both provided with a connecting structure 500, the connecting structure 500 includes a connecting pipe 501, the end of the connecting pipe 501 is connected to the corresponding hose, the connecting pipe 501 is threadedly sleeved with a threaded sleeve 502, the threaded sleeve 502 is divided into an inner and outer hole, the inner hole diameter of the threaded sleeve 502 is smaller than the outer hole diameter, the inner hole circle wall thread of the threaded sleeve 502 is threadedly connected to the outer wall thread groove of the connecting pipe 501, the outer walls of the liquid outlet and the liquid inlet of the resin tank 600 are both fixed with threaded pipes 503, the connecting pipe 501 is inserted and matched with the threaded pipe 503, the outer wall thread of the threaded pipe 503 is threadedly connected to the outer hole circle wall thread groove of the threaded sleeve 502, and the inner bottom wall of the outer hole of the threaded sleeve 502 is sealed and matched with the end of the threaded pipe 503 through a sealing ring. When the hose is connected to the liquid outlet and liquid inlet of the resin tank 600 through the connecting structure 500, the connecting tube 501 is correspondingly inserted into the threaded tube 503. At this time, the threaded sleeve 502 and the threaded tube 503 are not in contact. The threaded sleeve 502 is rotated, and the threaded sleeve 502 moves inward relative to the connecting tube 501. When the outer hole of the threaded sleeve 502 contacts the threaded tube 503, the threaded sleeve 502 is further rotated until the outer ring wall thread of the threaded tube 503 is fully threadedly connected with the thread groove of the outer hole of the threaded sleeve 502, thereby completing the connection. To disassemble the resin tank 600, the threaded sleeve 502 is rotated in the opposite direction to separate the threaded sleeve 502 from the threaded tube 503, and the connecting tube 501 is pulled out to complete the disassembly of the resin tank 600.

[0063] The present invention has the advantages of convenient installation or disassembly of the resin tank 600 and improved efficiency by providing the connecting pipe 501 , the threaded sleeve 502 and the threaded pipe 503 .

[0064] See also Figures 6 to 11, an embodiment of the present invention provides: an elastomer 3D printing resin recovery mechanism, the inner walls of the liquid outlet and the liquid inlet of the resin tank 600 are respectively provided with a blocking structure 1400, the blocking structure 1400 includes a guide column 1402 and a sealing plate 1401, the two guide columns 1402 are symmetrically fixed on the inner wall of the liquid outlet or the liquid inlet of the resin tank 600, and the two ends of the sealing plate 1401 are respectively sleeved on the two guide columns 1402, the sealing plate 1401 is arc-shaped, and the sealing plate 1401 contacts and cooperates with the inner walls corresponding to the liquid outlet and the liquid inlet of the resin tank 600, the inner ends of the two guide columns 1402 are respectively fixed with a limit block 1404, a spring B1403 is provided between the limit block 1404 and the sealing plate 1401, the spring B1403 is sleeved on the guide column 1402, and the two ends of the spring B1403 are respectively sleeved on the two guide columns 1402. It is fixedly connected to the limit block 1404 and the sealing plate 1401. The elastic coefficient of the spring B1403 is selected and used by technical personnel in this profession according to actual conditions. A sealing strip 1405 is fixed on the sealing plate 1401. The sealing strip 1405 forms a square frame. The frame-shaped sealing strip 1405 is arranged in an arc shape. The sealing strip 1405 is plugged into the embedded groove 601 opened on the inner wall of the liquid outlet or liquid inlet of the resin tank 600. The sealing is performed by plugging and matching the sealing strip 1405 with the embedded groove 601. The sealing plate 1401 is pushed and matched with the limit column 504 fixed at the insertion end of the connecting pipe 501. A limit groove 5031 is opened on the inner wall of the threaded tube 503. The inner end of the limit groove 5031 is closed and the outer end is open. The limit column 504 is L-shaped, and the transverse section of the limit column 504 is plugged into and matched with the limit groove 5031. When the connecting structure 500 is not docked, the force generated by the compressed spring B1403 presses against the sealing plate 1401, so that the sealing strip 1405 is inserted into the embedded groove 601, and the liquid photosensitive resin in the resin tank 600 is stored in the resin tank 600. When docking with the connecting structure 500, after the connecting pipe 501 is inserted into the threaded pipe 503, the transverse section of the limiting column 504 is inserted into the limiting groove 5031. The transverse section of the limiting column 504 moves to the bottom along the limiting groove 5031 to limit the inserted connecting pipe 501, so as to facilitate the connection between the threaded sleeve 502 and the threaded pipe 503. At this time, the longitudinal end of the limiting column 504 pushes the sealing plate 1401 open, and the sealing plate 1401 moves along the guide column 1402. The spring B1403 is further compressed, the sealing strip 1405 is separated from the embedded groove 601, and the connecting pipe 501 is connected to the resin tank 600.

[0065] The present invention has the advantages of sealing the liquid outlet and liquid inlet of the resin tank 600 by providing an embedded groove 601, a sealing plate 1401, a guide column 1402, a spring B1403, a limit block 1404 and a sealing strip 1405, and adaptively opening the liquid outlet and liquid inlet to circulate the liquid photosensitive resin after the resin tank 600 is installed, which has the advantage of easy operation.

[0066] Working principle: When using the 3D printer body 100 to print an elastomer, select an elastic liquid photosensitive resin and place the resin tank 600 filled with the liquid photosensitive resin inside the 3D printer body 100. The staff pushes the horizontal plate 706 downward by hand, and the connecting rod 707 moves downward relative to the fixed block 703. The curved plate B704 also moves downward, and the spring A705 is further compressed. The resin tank 600 is placed on the curved plate A702, and the resin tank 600 contacts the curved plate A702. The wall, loosen the horizontal plate 706, under the action of the spring A705, the arc plate B704 moves up, and the connecting rod 707 drives the horizontal plate 706 to move up until the top side of the horizontal plate 706 contacts the fixed block 703. At this time, the arc plate B704 and the arc plate A702 form a semi-arc plate to support the resin tank 600. When the connecting pipe 501 is correspondingly inserted into the threaded pipe 503, the threaded sleeve 502 and the threaded pipe 503 are not in contact. After the connecting pipe 501 is correspondingly inserted into the threaded pipe 503, the horizontal position of the limiting column 504 is The corresponding segment is inserted into the limiting groove 5031, and the horizontal segment of the limiting column 504 moves to the bottom along the limiting groove 5031 to limit the inserted connecting pipe 501. At this time, the longitudinal end of the limiting column 504 pushes the sealing plate 1401 open, and the sealing plate 1401 moves along the guide column 1402. The spring B1403 is further compressed, and the sealing strip 1405 is separated from the embedded groove 601. The connecting pipe 501 is connected to the resin tank 600, and the threaded sleeve 502 is rotated. The threaded sleeve 502 moves inward relative to the connecting pipe 501, etc. When the outer hole of the threaded sleeve 502 contacts the threaded tube 503, continue to rotate the threaded sleeve 502 until the outer ring wall thread of the threaded tube 503 is completely threadedly connected with the thread groove of the outer hole ring wall of the threaded sleeve 502. The resin tank 200 is installed, the solenoid valve B1200 is opened, the solenoid valve A1000 is closed, and the liquid pump 800 works to pump the liquid photosensitive resin in the resin tank 600 into the resin tank 200. Then the solenoid valve B1200 is closed and the 3D printer body 100 is started to perform 3D printing of the elastomer. After printing the elastomer, to recover the liquid photosensitive resin, the electric push rod 401 gently lifts the other side of the resin tank 200. Connecting block A301 rotates relative to connecting block B302 about the rotating shaft 303, coordinating with the tilting of the resin tank 200. This causes the liquid photosensitive resin in the resin tank 200 to flow back toward the return port of the resin tank 200. Solenoid valve A1000 opens, while solenoid valve B1200 closes. The liquid photosensitive resin in the resin tank 200 flows back into the resin tank 600 through the return port due to gravity. Solenoid valve A1000 is then closed. After the liquid photosensitive resin is recovered, the resin tank 200 is adjusted to a horizontal position.

[0067] After the liquid photosensitive resin in the resin tank 600 is used up, the staff pushes the horizontal plate 706 downward by hand, and the arc plate B704 moves down and no longer supports the resin tank 600. The resin tank 600 is taken out, and the threaded sleeves 502 at the liquid outlet and liquid inlet of the resin tank 600 are rotated in opposite directions respectively, and the threaded sleeves 502 are separated from the threaded tube 503. The connecting tube 501 is pulled out, and under the action of the spring B1403, the sealing plate 1401 is pushed to move along the guide column 1402 until the sealing strip 1405 is inserted into the embedded groove 601. The resin tank 600 is taken out, and the liquid photosensitive resin is added into the resin tank 600 through the liquid injection port to replenish the liquid photosensitive resin in the resin tank 600. Finally, the resin tank 600 is placed in the 3D printer body 100.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An elastomer 3D printing resin recovery mechanism, characterized by: The invention comprises a resin tank (200) provided on a 3D printer body (100), a resin tank (600) provided in the 3D printer body (100), and a liquid pump (800); a liquid inlet pipe (1100) is provided at the liquid inlet of the resin tank (200); a solenoid valve B (1200) is provided on the liquid inlet pipe (1100); a liquid return pipe (900) is provided at the liquid return port of the resin tank (200); a solenoid valve A (1000) is provided on the liquid return pipe (900); a liquid outlet of the resin tank (600), the liquid pump (800) and the solenoid valve B (1200), and a liquid inlet of the resin tank (600) and the solenoid valve A (1000) are connected respectively via hoses.

2. The elastomer 3D printing resin recovery mechanism according to claim 1, characterized in that: The 3D printer body (100) is provided with a support structure (700), and the support structure (700) includes a plurality of columns (701), and the top ends of the plurality of columns (701) are respectively provided with an arc plate A (702), and the plurality of columns (701) are respectively provided with a fixed block (703), and the plurality of fixed blocks (703) are respectively penetrated with a connecting rod (707), and the top ends of the plurality of connecting rods (707) are respectively provided with an arc plate B (704), and the bottom ends of the plurality of connecting rods (707) are connected to a horizontal plate (706), and a spring A (705) is provided between the fixed block (703) and the arc plate B (704).

3. The elastomer 3D printing resin recovery mechanism according to claim 1, characterized in that: One side of the resin tank (200) is connected to the housing of the 3D printer body (100) via a rotating structure (300), wherein the rotating structure (300) comprises a connecting block A (301), two connecting blocks A (301) are symmetrically arranged on one side of the resin tank (200), and a connecting block B (302) is provided on the housing of the 3D printer body (100), and two ends of the connecting block B (302) are respectively connected to the two connecting blocks A (301) via a rotating shaft (303); The other side of the resin tank (200) is connected to the housing of the 3D printer body (100) via a pushing structure (400). The pushing structure (400) includes an electric push rod (401). The base of the electric push rod (401) is connected to the housing of the 3D printer body (100) via a universal shaft B (403). The push rod end of the electric push rod (401) is connected to the other side of the resin tank (200) via a universal shaft A (402).

4. The elastomer 3D printing resin recovery mechanism according to claim 3, characterized in that: The inner bottom wall corresponding to the liquid return port of the resin tank (200) is provided with two opposing inclined surfaces (201), and the lower ends of the two inclined surfaces (201) correspond to the liquid return port.

5. The elastomer 3D printing resin recovery mechanism according to claim 1, characterized in that: The liquid outlet and liquid inlet of the resin tank (600) are both provided with a connection structure (500), the connection structure (500) comprises a connection pipe (501), the end of the connection pipe (501) is connected to a corresponding hose, a threaded sleeve (502) is threadedly sleeved on the connection pipe (501), the threaded sleeve (502) is divided into an inner and outer hole, the inner hole circle wall thread of the threaded sleeve (502) is threadedly connected to the outer wall thread groove of the connection pipe (501), the outer wall of the liquid outlet and liquid inlet of the resin tank (600) are both provided with a threaded pipe (503), the connection pipe (501) and the threaded pipe (503) are inserted and matched, and the outer wall thread of the threaded pipe (503) is threadedly connected to the outer hole circle wall thread groove of the threaded sleeve (502).

6. The elastomer 3D printing resin recovery mechanism according to claim 5, characterized in that: The inner wall of the liquid outlet and the liquid inlet of the resin tank (600) are both provided with a blocking structure (1400), and the blocking structure (1400) comprises a guide column (1402) and a sealing plate (1401), the two guide columns (1402) are symmetrically arranged on the inner wall of the liquid outlet or the liquid inlet of the resin tank (600), the two ends of the sealing plate (1401) are respectively sleeved on the two guide columns (1402), and the inner ends of the two guide columns (1402) are respectively A limit block (1404) is provided, a spring B (1403) is provided between the limit block (1404) and the sealing plate (1401), a sealing strip (1405) is provided on the sealing plate (1401), the sealing strip (1405) is plugged into an embedding groove (601) provided on the inner wall of the liquid outlet or liquid inlet of the resin tank (600), and the sealing plate (1401) is pushed into engagement with a limit column (504) at the insertion end of the connecting pipe (501).

7. The elastomer 3D printing resin recovery mechanism according to claim 6, characterized in that: A limiting groove (5031) is provided on the inner wall of the threaded tube (503), the limiting column (504) is L-shaped, and the transverse section of the limiting column (504) is inserted and matched with the limiting groove (5031).

8. A 3D printing device comprising the resin recovery mechanism according to any one of claims 1 to 7.

9. A 3D printing process using the 3D printing device according to claim 8, characterized in that: S1. Place a resin tank (200) filled with liquid photosensitive resin in a 3D printer body (100), and connect the liquid outlet and liquid inlet of the resin tank (200) to the two connecting structures (500) respectively; S2, opening the solenoid valve B (1200), closing the solenoid valve A (1000), and operating the liquid pump (800) to pump the liquid photosensitive resin in the resin tank (600) into the resin tank (200), then closing the solenoid valve B (1200), and starting the 3D printer body (100) to perform 3D printing of the elastomer; S3. After completing the 3D printing of the elastomer, the other side of the resin tank (200) is lifted by the pushing structure (400), and the resin tank (200) is tilted with the rotating structure (300) as the axis. The solenoid valve A (1000) is opened, and the solenoid valve B (1200) is in a closed state. The liquid photosensitive resin in the resin tank (200) flows back into the resin tank (600) from the liquid return port of the resin tank (200) due to gravity, and then the solenoid valve A (1000) is closed.

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