SLA photocuring 3D printer

Abstract

The utility model provides an SLA photocuring 3D printer, which belongs to the technical field of additive manufacturing and comprises a working shell, a trough, a second lifting mechanism and a scraping mechanism. A printing space, a light source system, a first lifting mechanism and a bearing plate are arranged in the working shell; the material groove is installed in the printing space and located below the bearing plate. The trough is provided with a bottom plate in sliding and sealing connection, a drainage cavity, a communicating hole, a liquid inlet hole and a liquid discharge hole are formed in the bottom plate, the bottom surface of the drainage cavity is an inclined surface, and the liquid discharge hole corresponds to the lower end of the inclined surface; the second lifting mechanism is installed at the bottom of the printing space. The lower end of the bottom plate is connected to the second lifting mechanism. The scraping mechanism is installed in the printing space and located above the trough. The scraping mechanism is provided with a scraping plate, and the scraping plate is used for scraping residual resin on the bottom plate. According to the SLA photocuring 3D printer provided by the utility model, the purpose of reducing the capacity of resin poured into the trough is achieved, and the effect of saving the resin is achieved; and resin residues in the trough are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to additive manufacturing technical field, more specifically, it relates to a SLA light solidification 3D printer. BACKGROUND

[0002] With the development of additive manufacturing industry, more and more three-dimensional models need to be completed by SLA light solidification printer. At the same time, with the advantages of high precision, rapid prototyping, multiple degree of freedom design, etc., SLA light solidification printer shows its unique advantages in many fields such as copying manufacturing, medical devices and custom parts industry. The existing SLA light solidification printer needs to pour a large amount of photosensitive resin into the tank first, until the whole tank is full. When the work is over, the resin in the whole tank needs to be recycled to the resin barrel, but a part of resin is often left at the bottom of the tank, and part of the resin is left on the bottom and inner wall of the tank, resulting in incomplete resin cleaning and recycling. At the same time, the height size of the processed model is different, so the required resin capacity is different in theory, but the tank needs to be filled at present, which causes low resin recycling efficiency and low work efficiency. SUMMARY

[0003] The utility model aims at providing a kind of SLA light solidification 3D printer to solve the technical problems of the bottom of tank being easy to leave resin and the low resin recycling efficiency in prior art.

[0004] To achieve the above object, the utility model adopts the technical scheme of providing a kind of SLA light solidification 3D printer, comprising:

[0005] Working housing, which is internally provided with a printing space, a light source system installed on the top of the printing space, a first lifting mechanism installed on one side of the printing space and a bearing plate installed on the first lifting mechanism;

[0006] Tank, which is installed in the printing space and located below the bearing plate; the bottom of the tank is provided with a bottom plate connected by sliding sealing, the inside of the bottom plate is provided with a drainage cavity, the upper end is provided with a communication hole, the lower end is provided with a liquid inlet hole and a liquid outlet hole, the bottom surface of the drainage cavity is an inclined surface for resin flow, and the liquid outlet hole corresponds to the low end of the inclined surface for resin flow towards the liquid outlet hole;

[0007] Second lifting mechanism, which is installed at the bottom of the printing space; the lower end of the bottom plate is connected to the free end of the second lifting mechanism;

[0008] Scraping mechanism, which is installed in the printing space and located above the tank; the scraping mechanism has a scraper that moves horizontally along the upper end of the tank, and the scraper is used to scrape the residual resin on the bottom plate.

[0009] In a possible implementation, the outer side of the bottom plate is provided with a seal arranged in a circumferential direction.

[0010] In a possible implementation, the seal comprises a seal groove opened on the outer side of the bottom plate and a seal ring installed in the seal groove.

[0011] In a possible implementation, the number of the communication holes is multiple, and the multiple communication holes are arranged in a rectangular array on the upper end surface of the bottom plate; the projections of the multiple communication holes on a horizontal plane are all located in the drainage cavity.

[0012] In a possible implementation, the material scraping mechanism further comprises:

[0013] Two guide rails are arranged in parallel and at intervals; the two guide rails are respectively installed on the two sides of the material groove, and the two ends of the two guide rails are respectively located outside the two ends of the material groove; the two ends of the scraper are respectively connected to the two guide rails in a sliding manner;

[0014] A driving mechanism is fixedly installed on the working housing and connected to the scraper, and used for driving the scraper.

[0015] In a possible implementation, the scraper is provided with a cooling channel arranged in a length direction, and the two ends are respectively provided with an opening connected to the cooling channel and a conduit connected to the opening.

[0016] In a possible implementation, the bottom plate is further provided with two flexible connecting pipes, one end of each of the two flexible connecting pipes is connected to the liquid inlet hole and the liquid outlet hole respectively; the working housing is provided with two through holes, the other end of each of the two flexible connecting pipes is connected to the two through holes respectively; the SLA light-curing 3D printer further comprises:

[0017] A resin barrel is arranged on one side of the working housing; the resin barrel is provided with a liquid outlet hole and a liquid return hole connected to the inside, and the liquid return hole is located above the liquid outlet hole;

[0018] Two water pumps are fixedly installed on the resin barrel and connected to the liquid outlet hole and the liquid return hole respectively.

[0019] Two transmission pipelines are connected to the two water pumps respectively at one end and connected to the two through holes respectively at the other end; the liquid outlet hole and the liquid return hole are connected to each other, and the liquid inlet hole and the liquid outlet hole are connected to each other.

[0020] In a possible implementation, the resin barrel is further provided with a filter screen and a transition pipe connected to the filter screen at one end, and the other end of the transition pipe is connected to the liquid outlet hole.

[0021] In a possible implementation, the SLA light-curing 3D printer further comprises:

[0022] A heat preservation layer is arranged around the outer side surface of the resin barrel, and a mounting space is arranged between the heat preservation layer and the resin barrel;

[0023] A cooling pipe is arranged in the mounting space and is spirally wound on the outer side surface of the resin barrel to reduce the temperature of the resin in the resin barrel.

[0024] A refrigeration compressor is mounted on one side of the resin barrel, and the refrigeration compressor is connected to both ends of the cooling pipe.

[0025] In a possible implementation, an annular support plate extending inward and arranged horizontally is arranged on the inner wall of the working housing, the material tank is located below the annular support plate, and the upper end of the material tank is fixedly connected to the annular support plate; the first lifting mechanism and the bearing plate are located above the annular support plate, and the material scraping mechanism is mounted on the annular support plate; the working housing is provided with an observation port in communication with the printing space, and the observation port is located above the annular support plate.

[0026] The beneficial effects of the SLA photopolymerization 3D printer provided by this utility model are as follows: Compared with the prior art, the SLA photopolymerization 3D printer of this utility model calculates the height of the printed model during operation and activates the second lifting mechanism to drive the base plate to move in the material tank, so that the effective working volume in the material tank is adapted to the model. This reduces the amount of resin poured into the material tank during the process of adding resin through the liquid inlet, thus achieving the effect of saving resin. Then, the first lifting mechanism in the working shell is activated to bring the support plate closer to the resin in the material tank. By activating the control system and the light source system, the resin on the support plate is acted upon, thereby forming the model layer by layer on the support plate under the effect of the photopolymerization function. When resin needs to be discharged after model processing, the drain hole is opened, allowing the resin in the trough to pass through the connecting hole into the drainage chamber. Under the action of the inclined surface, the resin is guided to flow quickly and completely toward the drain hole, greatly reducing the amount of resin residue in the trough. At the same time, the second lifting mechanism is activated again to control the bottom plate to move upward above the trough, so that the upper end face of the bottom plate corresponds to the scraper. The scraping mechanism is activated so that the scraper acts on the upper end face of the bottom plate, thereby scraping the resin on the upper end face of the bottom plate into the drainage chamber, and then smoothly discharged, greatly reducing the amount of resin residue in the trough. In addition, during the upward pushing of the bottom plate, the bottom plate can also smoothly scrape the residual resin on the inner wall of the trough onto the bottom plate, improving the resin recovery efficiency in the trough. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 The structure of the SLA photopolymer 3D printer provided in this embodiment of the utility model is used Figure 1 ;

[0029] Figure 2 The structure of the SLA photopolymer 3D printer provided in this embodiment of the utility model is used Figure 2 ;

[0030] Figure 3 Axial side of the base plate provided in the embodiment of this utility model Figure 1 ;

[0031] Figure 4 A cross-sectional view of the base plate provided in an embodiment of this utility model;

[0032] Figure 5 Axial side of the base plate provided in the embodiment of this utility modelFigure 2 ;

[0033] Figure 6 The connecting schematic view of the bottom plate and the trough provided by the embodiment of the utility model;

[0034] Figure 7 The structure schematic view of the scraping mechanism provided by the embodiment of the utility model;

[0035] Figure 8 The sectional view of the scraper provided by the embodiment of the utility model Figure 1 ;

[0036] Figure 9 The sectional view of the scraper provided by the embodiment of the utility model Figure 2 ;

[0037] Figure 10 The connecting schematic view of the working housing and the bearing plate provided by the embodiment of the utility model;

[0038] Figure 11 The sectional view of the working housing and the trough provided by the embodiment of the utility model;

[0039] Figure 12 The connecting schematic view of the sliding seat and the driver provided by the embodiment of the utility model;

[0040] Figure 13 The structure schematic view of the resin barrel provided by the embodiment of the utility model Figure 1 ;

[0041] Figure 14 The structure schematic view of the resin barrel provided by the embodiment of the utility model Figure 2 ;

[0042] Figure 15 The connecting schematic view of the first lifting mechanism and the bearing plate provided by the embodiment of the utility model Figure 1 ;

[0043] Figure 16 The connecting schematic view of the first lifting mechanism and the bearing plate provided by the embodiment of the utility model Figure 2 ;

[0044] Figure 17 The connecting schematic view of the second lifting mechanism and the bottom plate provided by the embodiment of the utility model;

[0045] Figure 18 The structure schematic view of the resin barrel and the cooling pipe provided by the embodiment of the utility model.

[0046] In the drawings, various reference signs are:

[0047] 1, working housing; 11, printing space; 12, light source system; 13, first lifting mechanism; 14, bearing plate; 15, through hole; 16, annular support plate; 17, viewing port; 18, cooling fin; 2, trough; 21, bottom plate; 22, drainage cavity; 23, communication hole; 24, liquid inlet hole; 25, liquid outlet hole; 26, inclined surface; 27, sealing element; 271, sealing groove; 272, sealing ring; 28, flexible connecting pipe; 29, mounting frame; 291, mounting hole; 3, second lifting mechanism; 4, scraping mechanism; 41, scraper; 42, guide rail; 43, driving mechanism; 44, cooling channel; 45, opening; 5, resin barrel; 51, liquid outlet hole; 52, liquid return hole; 53, water pump; 54, transmission pipeline; 55, filter screen; 56, transition pipe; 57, thermal insulation layer; 58, mounting spacing; 6, cooling pipe; 61, refrigeration compressor; 7, control system. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the following will be further described in detail with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0049] Please refer to Figures 1 to 18 , the SLA photocuring 3D printer provided by the present application will be described. The SLA photocuring 3D printer comprises a working housing 1, a trough 2, a second lifting mechanism 3 and a scraping mechanism 4. The working housing 1 is provided with a printing space 11, a light source system 12 mounted on the top of the printing space 11, a first lifting mechanism 13 mounted on one side of the printing space 11 and a bearing plate 14 mounted on the first lifting mechanism 13. The trough 2 is mounted in the printing space 11 and located below the bearing plate 14. The bottom of the trough 2 is provided with a sliding sealingly connected bottom plate 21, the inside of the bottom plate 21 is provided with a drainage cavity 22, the upper end is provided with a communication hole 23, the lower end is provided with a liquid inlet hole 24 and a liquid outlet hole 25, the bottom surface of the drainage cavity 22 is an inclined surface 26 for resin flow, and the liquid outlet hole 25 corresponds to the low end of the inclined surface 26 for resin flow toward the liquid outlet hole 25. The second lifting mechanism 3 is mounted at the bottom of the printing space 11. The lower end of the bottom plate 21 is connected to the free end of the second lifting mechanism 3. The scraping mechanism 4 is mounted in the printing space 11 and located above the trough 2. The scraping mechanism 4 has a scraper 41 moving horizontally along the upper end of the trough 2, and the scraper 41 is used to scrape the residual resin on the bottom plate 21.

[0050] Compared with the prior art, the SLA photocuring 3D printer has the following advantages: when working, the height of the printed model is calculated, and the second lifting mechanism 3 is started to drive the bottom plate 21 to move in the trough 2, so that the effective working volume in the trough 2 is adapted to the model, thereby achieving the purpose of reducing the resin pouring capacity of the trough 2 during the process of adding resin into the trough 2 through the liquid inlet hole 24, and realizing the effect of saving resin; then the first lifting mechanism 13 in the working shell 1 is started to make the bearing plate 14 close to the resin in the trough 2, and the resin on the bearing plate 14 is acted on by the starting control system 7 and the light source system 12, so that the model is formed on the bearing plate 14 layer by layer under the effect of the photocuring function. When the resin needs to be discharged after the model processing is completed, the liquid outlet hole 25 is opened to make the resin in the trough 2 pass through the communication hole 23 into the drainage cavity 22, and the resin is guided to flow towards the liquid outlet hole 25 quickly and completely under the action of the inclined surface 26, thereby greatly reducing the residual amount of the resin in the trough 2; at the same time, the second lifting mechanism 3 is started again to control the bottom plate 21 to move upwards to above the trough 2, so that the upper end surface of the bottom plate 21 corresponds to the scraper 41; the scraping mechanism 4 is started to make the scraper 41 act on the upper end surface of the bottom plate 21, so that the resin on the upper end surface of the bottom plate 21 is scraped into the drainage cavity 22 and then is smoothly discharged, thereby greatly reducing the residual resin in the trough 2. And in the process of pushing the bottom plate 21 upwards, the bottom plate 21 can smoothly scrape the residual resin on the inner wall of the trough 2 onto the bottom plate, thereby improving the recycling efficiency of the resin in the trough 2.

[0051] The control system 7 is installed on the working shell 1 to control the starting, closing, printing and other operations of the entire SLA photocuring 3D printer. Meanwhile, the heat dissipation fin 18 is arranged on the outer side surface of the working shell 1. The first lifting mechanism 13 adopts a screw driving mode, and the first lifting mechanism 13 comprises a motor, a lead screw and a nut, the bearing plate 14 is fixedly installed on the nut, and a plurality of through holes are arranged on the bearing plate 14. The second lifting mechanism 3 adopts a scissor type elevator, and the bottom plate 21 is installed on the top of the scissor type elevator. The lower end of the bottom plate 21 is provided with a mounting bracket 29 connected with the second lifting mechanism 3, the mounting bracket 29 is provided with a mounting hole 291, and the free end of the second lifting mechanism 3 is connected in the mounting hole 291.

[0052] Please refer to Figures 3 to 6 As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the outer side surface of the bottom plate 21 is provided with a sealing element 27 arranged in a circumferential direction, and the sealing element 27 arranged in the circumferential direction on the outer side surface of the bottom plate 21 makes the bottom plate 21 and the trough 2 have good and complete sealing.

[0053] Please refer to Figures 3 to 6As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the sealing piece 27 comprises a sealing groove 271 opened on the outer side surface of the bottom plate 21 and a sealing ring 272 installed in the sealing groove 271; the sealing groove 271 is arranged in the circumferential direction on the outer side surface of the bottom plate 21, and the annular sealing ring 272 is fitted and installed into the sealing groove 271, so that the bottom plate 21 installed in the material tank 2 is under the action of the sealing ring 272 and the sealing groove 271, and a good sealing connection is formed between the bottom plate 21 and the material tank 2, and the liquid leakage does not occur. The sealing groove 271 and the sealing ring 272 are both multiple, and the multiple sealing grooves 271 are arranged in the upper and lower directions, and the multiple sealing rings 272 are respectively installed in the corresponding sealing grooves 271; that is, the multiple sealing pieces 27 are arranged in the axial direction on the outer side surface of the bottom plate 21, so that the connection strength between the bottom plate 21 and the material tank 2 is increased. Specifically, the multiple sealing grooves 271 are arranged in the upper and lower directions on the outer side surface of the bottom plate 21, and the sealing ring 272 is installed in each sealing groove 271.

[0054] Please refer to Figures 3 to 6 As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the number of the communication holes 23 is multiple, and the communication holes 23 are arranged in a rectangular array on the upper end surface of the bottom plate 21; the projections of the multiple communication holes 23 on the horizontal plane are all located in the drainage cavity 22; the multiple communication holes 23 are uniformly arranged, so that the communication state between the inside of the material tank 2 and the drainage cavity 22 in the inside of the bottom plate 21 is high in uniformity, and the resin flow rate, pressure and the like in each direction are consistent. The projections of the multiple communication holes 23 on the horizontal plane are all located in the drainage cavity 22, so that the resin flows downward from the material tank 2 and passes through the multiple communication holes 23 to enter the drainage cavity 22, and can completely fall downward to enter the drainage cavity 22, the communication hole 23 and the drainage cavity 22 are in complete communication state from top to bottom, and the flow area is large and does not hinder the resin.

[0055] Please refer to Figures 7 to 9As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the scraping mechanism 4 further comprises guide rails 42 and a driving mechanism 43, the number of the guide rails 42 is two, and the guide rails 42 are arranged in parallel and at intervals; the two guide rails 42 are respectively installed on the two sides of the trough 2, and the two ends of the two guide rails 42 are respectively located outside the two ends of the trough 2; the two ends of the scraper 41 are respectively slidably connected to the two guide rails 42; the driving mechanism 43 is fixedly installed on the working housing 1 and connected with the scraper 41 and used for driving the scraper 41; the two guide rails 42 are arranged in parallel and at intervals above the two sides of the trough 2, and the scraper 41 is installed between the two guide rails 42, the length direction of the scraper 41 is perpendicular to the length direction of the guide rails 42, and the two ends of the scraper 41 are respectively slidably connected with the two guide rails 42, and the driving mechanism 43 is arranged, the free end of the driving mechanism 43 is fixedly connected with the scraper 41, the scraper 41 is driven to move along the length direction of the guide rail 42 by means of the driving mechanism 43, and then the residual resin on the bottom plate 21 is scraped off. The driving mechanism 43 can be provided as two and connected with the two ends of the scraper 41 respectively. The driving mechanism 43 comprises a driving motor, a driving gear, a driven gear and a synchronous belt, and the end of the scraper 41 is fixedly connected to the synchronous belt.

[0056] Please refer to Figure 8 and Figure 9 As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the scraper 41 is provided with a cooling channel 44 arranged in the length direction, and the two ends are respectively provided with an opening 45 communicated with the cooling channel 44 and a pipe communicated with the opening 45; in order to improve the scraping function of the scraper 41 on the residual resin, the scraper 41 is in a low temperature state. Specifically, the cooling channel 44 is arranged in the scraper 41, the opening 45 and the pipe are arranged at the two ends, and cooling medium is added in one pipe, and the cooling medium passes through the cooling channel 44 and flows out from the other opening 45 and pipe.

[0057] Please refer to Figures 1 to 3 , Figures 10 to 14As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, two flexible connecting pipes 28 are further arranged on the bottom plate 21, one end of the two flexible connecting pipes 28 is connected with the liquid inlet hole 24 and the liquid outlet hole 25 respectively, two through holes 15 are arranged on the working shell 1, the other end of the two flexible connecting pipes 28 is connected with the two through holes 15 respectively, the SLA photocuring 3D printer further comprises a resin barrel 5, a water pump 53 and a transmission pipeline 54, the resin barrel 5 is arranged on one side of the working shell 1, a liquid outlet hole 51 and a liquid return hole 52 which are in communication with the inside of the resin barrel 5 are arranged on the resin barrel 5, and the liquid return hole 52 is located above the liquid outlet hole 51, the number of the water pump 53 is two, the water pump 53 is fixedly installed on the resin barrel 5 and connected with the liquid outlet hole 51 and the liquid return hole 52 respectively, the number of the transmission pipeline 54 is two, one end of the two transmission pipelines 54 is connected with the two water pumps 53 respectively, and the other end is connected with the two through holes 15 respectively, the liquid outlet hole 25 is in communication with the liquid return hole 52, and the liquid inlet hole 24 is in communication with the liquid outlet hole 51, two flexible connecting pipes 28 are arranged and connected with the liquid inlet hole 24 and the liquid outlet hole 25 respectively, so that the bottom plate 21 can move up and down in the tank 2 without affecting the connection and communication between the bottom plate 21, the working shell 1 and the resin barrel 5. The resin barrel 5 is arranged on one side of the working shell 1, the liquid outlet hole 51 and the liquid return hole 52 are arranged on the resin barrel 5, two water pumps 53 are installed on the outer side, the two water pumps 53 are in communication with the liquid outlet hole 51 and the liquid return hole 52 respectively, the two transmission pipelines 54 are installed on the outer wall of the resin barrel 5, one end of the two transmission pipelines 54 is connected with the two water pumps 53 respectively, and the other end is connected with the outer wall of the working shell 1 and in communication with the two through holes 15 respectively. The two flexible connecting pipes 28 connected with the bottom plate 21 are connected with the two through holes 15 in the working shell 1, so as to achieve the purpose that the liquid inlet hole 24, the flexible connecting pipe 28, the transmission pipeline 54 and the liquid outlet hole 51 are in communication, and the purpose that the liquid outlet hole 25, the flexible connecting pipe 28, the transmission pipeline 54 and the liquid return hole 52 are in communication is also achieved.

[0058] Please refer to Figure 14 As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, a filter screen 55 and a transition pipe 56 connected with the filter screen 55 are further arranged in the resin barrel 5, one end of the transition pipe 56 is connected with the liquid outlet hole 51, the transition pipe 56 is first installed on the inner wall of the resin barrel 5, one end of the transition pipe 56 is connected with one end of the liquid outlet hole 51, and the filter screen 55 is arranged on the other end of the transition pipe 56, so that the resin can be filtered by the filter screen 55 before passing through the liquid outlet hole 51, and the resin entering the tank 2 contains less impurities.

[0059] Please refer to Figures 1 to 3 , Figures 10 to 14 , Figure 18As a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the SLA photocuring 3D printer further comprises a heat preservation layer 57, a cooling pipe 6 and a refrigeration compressor 61; the heat preservation layer 57 is arranged around the outer side surface of the resin barrel 5; a mounting spacing 58 is arranged between the heat preservation layer 57 and the resin barrel 5; the cooling pipe 6 is arranged in the mounting spacing 58 and is spirally wound on the outer side surface of the resin barrel 5, for reducing the temperature of the resin in the resin barrel 5; the refrigeration compressor 61 is mounted on one side of the resin barrel 5, and the refrigeration compressor 61 is connected with both ends of the cooling pipe 6; in order to ensure the excellent properties of the resin in the resin barrel 5 and the trough 2, the cooling pipe 6 is arranged on the outer side surface of the resin barrel 5, and the refrigeration compressor 61 is used to add cooling medium into the cooling pipe 6, so that the resin in the resin barrel 5 can be in a good state by means of the cooling medium. The cooling pipe 6 is arranged uniformly and densely to improve the cooling effect. The heat preservation layer 57 is arranged outside the resin barrel 5 to improve the heat preservation performance of the resin barrel 5. The mounting spacing 58 is arranged between the heat preservation layer 57 and the resin barrel 5, and the cooling pipe 6 is arranged in the mounting spacing 58. The refrigeration compressor 61 is provided with a condenser pipe and a capillary tube, and the capillary tube is connected with the lower end of the cooling pipe 6.

[0060] Please refer to Figure 1 and Figure 2 、 Figures 10 to 12 , as a specific embodiment of the SLA photocuring 3D printer provided by the utility model, the inner wall of the working shell 1 is provided with an annular support plate 16 extending inward and arranged horizontally, the trough 2 is located below the annular support plate 16, and the upper end of the trough 2 is fixedly connected with the annular support plate 16; the first lifting mechanism 13 and the bearing plate 14 are located above the annular support plate 16, and the scraping mechanism 4 is mounted on the annular support plate 16; the working shell 1 is provided with an observation port 17 communicating with the printing space 11, and the observation port 17 is located above the annular support plate 16; the annular support plate 16 is arranged at the middle position of the working shell 1, and plays a good supporting and connecting role. The printing space 11 in the working shell 1 is divided into two parts by means of the annular support plate 16, the trough 2 is installed below the annular support plate 16, the upper end of the trough 2 is fixed on the annular support plate 16, and the inner diameter of the trough 2 is the same as the diameter of the inner circle of the annular support plate 16; the first lifting mechanism 13 and the bearing plate 14 are placed above the annular support plate 16, and the cross-sectional area of the annular support plate 16 is smaller than the inner circle cross-sectional area of the annular support plate 16. The scraping mechanism 4 is supported and installed on the annular support plate 16, and then the upper end surface of the bottom plate 21 in the trough 2 can be scraped on one side of the trough 2. At the same time, the observation port 17 is arranged on the outer side surface of the working shell 1, and the staff can watch the inside of the printing space 11 through the observation port 17. The annular support plate 16 also makes the bearing capacity and strength of the whole working shell 1 higher, and the working is more stable and reliable.

[0061] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An SLA light-cured 3D printer, characterized in that, The application relates to an SLA light-curing 3D printer. The printer comprises a working housing, a printing space, a light source system arranged on the top of the printing space, a first lifting mechanism arranged on one side of the printing space, and a bearing plate arranged on the first lifting mechanism. A tank is arranged in the printing space and below the bearing plate. The bottom of the tank is provided with a slidingly and sealingly connected bottom plate. The inside of the bottom plate is provided with a drainage cavity.

2. The SLA light-cured 3D printer of claim 1, wherein, The upper end of the bottom plate is provided with a communication hole.

3. The SLA light-cured 3D printer of claim 2, wherein, The lower end of the bottom plate is provided with an inlet hole and a discharge hole.

4. The SLA light-cured 3D printer of claim 1, wherein, A second lifting mechanism is arranged on the bottom of the printing space.

5. The SLA light-cured 3D printer of claim 1, wherein, The lower end of the bottom plate is connected to the free end of the second lifting mechanism. A scraping mechanism is arranged in the printing space and above the tank. The scraping mechanism comprises a scraper which moves horizontally along the upper end of the tank.

6. The SLA light-cured 3D printer of claim 5, wherein, The scraper is used to scrape the residual resin on the bottom plate.

7. The SLA light-cured 3D printer of claim 1, wherein, The outer side of the bottom plate is provided with a sealing element arranged in the circumferential direction. The sealing element comprises a sealing groove arranged on the outer side of the bottom plate and a sealing ring arranged in the sealing groove. The communication hole is in the form of a rectangular array on the upper end surface of the bottom plate. The projections of the plurality of communication holes on the horizontal plane are located in the drainage cavity.

8. The SLA light-cured 3D printer of claim 7, wherein, The scraping mechanism further comprises:

9. The SLA light-cured 3D printer of claim 7, wherein, Two guide rails are arranged in parallel and at intervals. The two guide rails are respectively arranged on the two sides of the tank. The two ends of the scraper are respectively connected to the two guide rails. A driving mechanism is fixedly arranged on the working housing and connected to the scraper. The scraper is provided with a cooling channel arranged in the length direction. The two ends of the scraper are respectively provided with an opening connected to the cooling channel and a conduit connected to the opening. The bottom plate is further provided with two flexible connecting pipes. One end of each of the two flexible connecting pipes is respectively connected to the inlet hole and the discharge hole. The working housing is provided with two through holes. The other end of each of the two flexible connecting pipes is respectively connected to the two through holes. The SLA light-curing 3D printer further comprises: A resin tank is arranged on one side of the working housing. The resin tank is provided with an outlet hole and a return hole which are in communication with the inside of the resin tank. Two water pumps are fixedly arranged on the resin tank and respectively connected to the outlet hole and the return hole. Two transmission pipelines are respectively connected to the two water pumps and the two through holes. The discharge hole is in communication with the return hole. The inlet hole is in communication with the outlet hole. The resin tank is further provided with a filter screen and a transition pipe connected to the filter screen. The SLA light-curing 3D printer further comprises: A heat preservation layer is arranged around the outer side of the resin tank. An installation interval is arranged between the heat preservation layer and the resin tank. Cooling pipes are arranged in the mounting space and spirally wound on the outer side of the resin barrel to reduce the temperature of the resin in the resin barrel; A refrigeration compressor is mounted on one side of the resin barrel and connected with both ends of the cooling pipes.

10. The SLA light-cured 3D printer according to any one of claims 1-9, wherein, An inner wall of the working shell is provided with an annular support plate extending inward and arranged horizontally, the trough is located below the annular support plate, and the upper end of the trough is fixedly connected with the annular support plate; the first lifting mechanism and the bearing plate are located above the annular support plate, and the material scraping mechanism is mounted on the annular support plate; the working shell is provided with an observation port communicating with the printing space, and the observation port is located above the annular support plate.

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