A 3D printing device capable of quickly replacing liquid tank

Abstract

The present invention relates to a 3D printing device capable of quickly replacing a liquid tank, and relates to the technical field of photocuring 3D printing, comprising a base frame, on which a molding mechanism and a supply mechanism for supplying molding materials to the molding mechanism are installed; the molding mechanism comprises a molding screen, a molding lifting assembly for driving the molding screen to rise and fall, a light-curing assembly for photocuring molding, and a scraping assembly for scraping resin; the supply mechanism comprises a liquid tank for placing molding materials, a transport assembly for transporting the liquid tank, and a supply lifting assembly for lifting the liquid tank. When replacing the liquid tank, the lifting platform descends to lower the lifting platform to the lower limit, at which time the liquid tank can be moved to a cart, thereby detaching from the base frame so as to replace a new liquid tank, thereby making the replacement and installation of the liquid tank of the 3D printing device easier.

Description

Technical Field

[0001] The present invention relates to the technical field of photocuring 3D printing, and in particular to a 3D printing device capable of quickly replacing a liquid tank. Background Art

[0002] SLA is the abbreviation of "Stereo Lithography Apparatus", which means stereolithography. SLA 3D printing rapid prototyping technology is a technology that uses digital models as the basis, liquid photosensitive resin as the material, and constructs objects by printing layer by layer. With the continuous progress of society, photolithography 3D printing technology is becoming more and more important in human development, and its importance is comparable to that of computers. Rapid 3D printing technology does not need to be operated in the factory, which means that there is no need for mechanical processing or any molds. This not only improves production efficiency but also reduces production costs. On the basis of 3D printing, SLA photolithography technology has made further improvements to it and has become a development trend of modern technology.

[0003] At present, the light-curing 3D printer equipment on the market has only one liquid tank. With the continuous upgrading of resin materials, there are more and more types of resins. Depending on the application, customers may change materials at any time, but the resin tank and equipment of the original equipment are not easy to replace. When customers want to change materials, they can only release the original resin material, and then release the resin in the resin tank and then clean the resin tank with alcohol. It is time-consuming and laborious. Every time the material is changed, it is necessary to repeat this work. Long-term contact with resin will cause certain harm to the human body. Summary of the invention

[0004] The purpose of the present invention is to provide a 3D printing device capable of quickly replacing a liquid tank, and the technical problem to be solved is to facilitate the replacement of the liquid tank.

[0005] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0006] A 3D printing device capable of quickly replacing a liquid tank comprises a base frame on which a molding mechanism and a supply mechanism for supplying molding material to the molding mechanism are mounted;

[0007] The molding mechanism includes a molding screen, a molding lifting component for driving the molding screen to lift, a light curing component for light curing molding, and a scraping component for scraping resin;

[0008] The supply mechanism includes a liquid tank containing molding material, a transport component for transporting the liquid tank, and a supply lifting component for lifting the liquid tank;

[0009] The supply lifting assembly is located below the forming mesh plate, and the supply lifting assembly includes a lifting platform for placing the liquid tank and a supply lifting frame for driving the lifting platform to lift and lower. The lifting platform is lifted to have an upper limit and a lower limit. When the lifting platform is at the upper limit, the forming mesh plate is located in the liquid tank;

[0010] The transport assembly comprises a trolley for transporting the liquid tank, the trolley is provided with a placement space, and the lifting platform is communicated with the placement space of the trolley when the lifting platform is at the lower limit position.

[0011] By adopting the above technical solution, the supply lifting frame is lowered so that the lifting platform is located at the lower limit position, the cart is moved to the side of the base frame so that the placement space of the cart is connected with the lifting platform, the liquid tank is moved so that the liquid tank slides onto the lifting platform, and then the supply lifting frame is raised so that the lifting platform is located at the upper limit position, thereby completing the installation of the liquid tank;

[0012] The molding lifting component drives the molding stencil to lift and lower so that the molding stencil is immersed in the resin in the liquid tank, the light-curing component emits laser to light-cure the resin on the molding stencil, and then the molding lifting component drives the molding stencil to descend, the scraping component scrapes the resin liquid surface, and the light-curing component emits laser again to light-cure the resin and stack it on the previous layer of light-cured resin. The above steps are repeated until the actual required product is obtained, thereby completing printing;

[0013] When replacing the liquid tank, the lifting platform is lowered to the lower limit position. At this time, the liquid tank can be moved to the cart, thereby separating from the base frame so as to replace a new liquid tank. As a result, the replacement and installation of the liquid tank of the 3D printing device is easier.

[0014] The present invention is further configured as follows: an electromagnetic lock for fixing the liquid tank is arranged on the lifting platform, the electromagnetic lock comprises an electromagnet fixedly connected to the lifting platform and a magnetic piece for cooperating with the electromagnet, and the magnetic piece is located on the liquid tank.

[0015] By adopting the above technical solution, when the lifting platform rises, the electromagnet is energized to generate magnetism to magnetically adsorb the magnetic member, thereby limiting the sliding of the liquid tank to fix the liquid tank on the lifting platform, so that the liquid tank remains stable during the lifting process;

[0016] When the lifting platform descends to the lower limit, the electromagnet is powered off to allow the magnetic piece and the electromagnet to separate. At this time, the movable liquid tank can slide off the lifting platform and enter the cart, thereby keeping the liquid tank of the 3D printing device stable during the replacement process.

[0017] The present invention is further configured as follows: a caster is fixedly provided at the lower end of the liquid tank, a guide slot for movement of the caster is provided on the lifting platform, and the opening of the guide slot is located at the end surface of the lifting platform close to the forming mesh plate and the end surface of the lifting platform close to the cart.

[0018] By adopting the above technical solution, the caster slides along the guide groove so that the liquid tank can stably enter or leave the lifting platform. Therefore, the setting of the caster and the electromagnetic lock makes it easy to replace the liquid tank while ensuring the stable installation of the liquid tank.

[0019] The present invention is further configured as follows: a placing table is provided in the placing space of the cart, the upper end surface of the placing table is flush with the upper end surface of the lifting platform when the lifting platform is at the lower limit position, and a connecting piece for fixing the placing position of the liquid tank is provided on the placing table, the connecting piece includes a main buckle end and a buckled end detachably connected to the main buckle end, the buckled end is fixedly connected to the placing table, and the main buckle end is fixedly connected to the liquid tank.

[0020] By adopting the above technical solution, the main buckle end and the buckled end of the connecting piece cooperate to stabilize the connection between the liquid tank and the placement table, thereby allowing the liquid tank to be stably located on the cart when the cart drives the liquid tank to move, thereby facilitating the replacement of the liquid tank.

[0021] The present invention is further configured as follows: the supply lifting frame includes a lower seat plate fixedly connected to the base frame and an upper seat plate connected to the lifting platform, the lower seat plate is simultaneously hingedly connected with a first lower hinge plate and a second lower hinge plate, the upper seat plate is simultaneously hingedly connected with a first upper hinge plate and a second upper hinge plate, one end of the first lower hinge plate is hingedly connected to a first connecting block, the first connecting block is hingedly connected to the first upper hinge plate, one end of the second lower hinge plate is hingedly connected to a second connecting block, the second connecting block is hingedly connected to the second lower hinge plate, and the first connecting block is provided with a distance adjustment portion for driving the second connecting block to move closer or further away.

[0022] By adopting the above technical solution, the distance adjusting part makes the first connecting block and the second connecting block close to each other so that the upper seat plate and the lower seat plate are away from each other, thereby driving the lifting platform to rise;

[0023] The distance adjusting part makes the first connecting block and the second connecting block move away from each other so that the upper seat plate and the lower seat plate move closer to each other, thereby making the lifting platform;

[0024] Thus, the distance between the first connecting block and the second connecting block is controlled by the distance adjusting part, so as to realize the control of the lifting and lowering of the lifting platform.

[0025] The present invention is further configured as follows: the pitch adjusting part includes a pitch adjusting screw threadedly connected to the first connecting block and a pitch adjusting motor driving the pitch adjusting screw to rotate, the pitch adjusting motor is fixedly connected to the first connecting block, the pitch adjusting screw has a first thread segment and a second thread segment, the rotation direction of the first thread segment is opposite to that of the second thread segment, the first thread segment is threadedly connected to the first connecting block, and the second thread segment is threadedly connected to the second connecting block.

[0026] By adopting the above technical solution, the rotation direction of the first thread segment is opposite to that of the second thread segment, so that the sliding direction of the first connecting block is opposite to that of the second connecting block. As a result, the pitch adjusting motor drives the pitch adjusting screw to rotate, so that the first connecting block and the second connecting block are closer to or farther away from each other.

[0027] The present invention is further configured as follows: the supply lifting frame also includes a guide limit portion for limiting the sliding of the lifting platform, the guide limit portion includes a light rod fixedly arranged on the base frame, the light rod is arranged in a vertical direction, the light rod passes through the lifting platform, and the lifting platform is slidably connected to the light rod.

[0028] By adopting the above technical solution, the lifting platform slides along the polished rod, which limits the possible displacement of the lifting platform in the horizontal direction, making the lifting of the lifting platform more stable.

[0029] The present invention is further configured as follows: an upper limit plate is fixedly provided on the polished rod, and the lifting platform is located below the upper limit plate.

[0030] By adopting the above technical solution, the upper limit plate limits the rising height of the lifting platform, thereby preventing the liquid tank from rising too high and colliding with the scraping component on the base frame to cause damage.

[0031] The present invention is further configured as follows: the supply mechanism also includes a temperature control component for controlling the temperature around the lifting platform, the temperature control component includes a heat preservation plate arranged on three sides around the outside of the lifting platform, and a heating element is fixedly arranged on one side of the heat preservation plate.

[0032] By adopting the above technical solution, the heating element generates heat to increase the temperature around the lifting platform, so that the resin in the liquid tank is maintained at the most suitable temperature.

[0033] In summary, the beneficial technical effects of the present invention are:

[0034] 1. When replacing the liquid tank, the lifting platform is lowered to the lower limit position, and the liquid tank can be moved to the cart, thereby being separated from the base frame so as to be replaced with a new liquid tank, thereby making the replacement and installation of the liquid tank of the 3D printing device easier;

[0035] 2. When the lifting platform rises, the electromagnet is energized to generate magnetism to magnetically adsorb the magnetic part, thereby limiting the sliding of the liquid tank to fix the liquid tank on the lifting platform, so that the liquid tank remains stable during the lifting process. When the lifting platform descends to the lower limit, the electromagnet is powered off to allow the magnetic part and the electromagnet to separate. At this time, the mobile liquid tank can slide off the lifting platform and enter the cart, thereby allowing the liquid tank of the 3D printing device to remain stable during the replacement process;

[0036] 3. The main buckle end and the buckled end of the connecting piece cooperate to stabilize the connection between the liquid tank and the placement table, thereby enabling the liquid tank to be stably located on the trolley when the trolley drives the liquid tank to move, thereby facilitating the replacement of the liquid tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the molding lifting assembly;

[0039] Figure 3 It is a structural schematic diagram of the scraping assembly;

[0040] Figure 4 It is a schematic diagram of the structure of the supply lifting assembly;

[0041] Figure 5 It is a schematic diagram of the structure of the transport component.

[0042] In the figure, 1, base frame; 11, laser partition; 111, heat dissipation hole; 12, top plate; 2, forming mechanism; 21, forming mesh plate; 22, forming lifting assembly; 221, enclosure; 2211, lifting guide rail; 222, mesh plate lifting frame; 2221, frame; 2222, guide block; 223, first driving part; 2231, driving screw; 2232, first driving motor; 2233, limit rotation sleeve; 23, optical solidification component; 231, galvanometer; 232, industrial computer; 233, power supply; 24, scraping component; 241, scraper; 2411, scraper; 2412, positioning ejector; 242, second driving part; 2421, driving wheel; 2422, driven wheel; 2423, conveyor belt; 2424, second driving motor; 2425, guide rail; 3, supply mechanism; 31, liquid tank; 311, casters; 32, transport assembly; 321, cart; 322, placement table; 33, supply lifting assembly; 331, lifting table; 3311, guide chute; 332, supply lifting frame; 3321, lower seat plate; 3322, upper seat plate; 3323, first lower hinge plate; 3324, second lower hinge plate; 3325, first upper hinge plate; 3326, second upper hinge plate; 3327, first connecting rod Connecting block; 3328, second connecting block; 333, pitch-adjusting part; 3331, pitch-adjusting screw; 3332, pitch-adjusting motor; 334, guide limit part; 3341, bare rod; 3342, upper limit plate; 34, electromagnetic lock; 341, electromagnet; 342, magnetic part; 35, connecting part; 351, main buckle end; 352, buckled end; 36, temperature control component; 361, insulation board; 362, heating element. DETAILED DESCRIPTION

[0043] A preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0044] Reference Figure 1 , is a 3D printing device capable of quickly replacing a liquid tank disclosed in the present invention, comprising a base frame 1, on which a molding mechanism 2 and a supply mechanism 3 for supplying molding material to the molding mechanism 2 are mounted.

[0045] The base frame 1 is arranged upright in a rectangular frame. The base frame 1 is formed by connecting a plurality of cross bars and a plurality of vertical bars by bolts. The base frame 1 is covered with a housing (not shown in the figure). The housing is provided with an opening and closing door (not shown in the figure).

[0046] Reference Figure 1 and Figure 2The molding mechanism 2 includes a molding screen 21, a molding lifting assembly 22 for driving the molding screen 21 to rise and fall, a light curing assembly 23 for light curing molding, and a scraping assembly 24 for scraping resin.

[0047] The forming mesh plate 21 is arranged in a rectangular plate body. The forming mesh plate 21 is placed horizontally so as to be lifted and lowered in a vertical direction. A plurality of mesh holes are arranged through the forming mesh plate 21 in a vertical direction.

[0048] The forming lifting assembly 22 includes a surrounding plate 221 fixedly disposed on the base frame 1 , a mesh plate lifting frame 222 slidably disposed on the surrounding plate 221 along a vertical direction, and a first driving part 223 for driving the mesh plate lifting frame 222 to slide.

[0049] The enclosure 221 is located at one end of the forming mesh plate 21 away from the opening and closing door. The enclosure 221 is a rectangular plate body arranged in the vertical direction. The length direction of the enclosure 221 extends in the vertical direction, and the width direction of the enclosure 221 extends in the horizontal direction. The lower end surface of the enclosure 221 is located above the forming mesh plate 21.

[0050] A lifting guide rail 2211 is fixedly arranged vertically on the enclosure 221. There are two lifting guide rails 2211, which are respectively located at both ends of the width direction of the enclosure 221. The length of the lifting guide rail 2211 is less than the length of the enclosure 221, and the lower end surface of the lifting guide rail 2211 is located above the lower end surface of the enclosure 221.

[0051] The mesh plate lifting frame 222 includes a frame body 2221 slidably connected to the lifting rail 2211 and a guide block 2222 fixedly arranged on the frame body 2221. The frame body 2221 and the guide block 2222 are fixedly connected by bolts or integrally formed. There are two frames 2221, and the two frames 2221 are slidably connected to the two lifting rails 2211 respectively. Preferably, the frame body 2221 is arranged in an "L" shape so that the frame body 2221 has a vertical long side and a horizontal short side. The horizontal short side of the frame body 2221 is located at the lower end of the vertical long side of the frame body 2221 and is located on the side of the vertical long side close to the opening and closing door. The vertical long side of the frame body 2221 is slidably connected to the lifting rail 2211. The horizontal short side of the frame body 2221 is fixedly connected to the lower end surface of the forming mesh plate 21 by bolts. The two ends of the guide block 2222 are fixedly connected to the upper ends of the two vertical long sides respectively. A threaded hole is formed through the middle of the guide block 2222 , and the axis of the threaded hole is arranged along the vertical direction.

[0052] The first driving part 223 includes a driving screw 2231 threadedly connected to the threaded hole of the guide block 2222 and a first driving motor 2232 driving the driving screw 2231. The axis of the driving screw 2231 is arranged in the vertical direction, and the driving screw 2231 is located between the two lifting guide rails 2211. The axis of the driving screw 2231 coincides with the axis of the threaded hole of the guide block 2222. The first driving motor 2232 is fixedly connected to the enclosure 221 by bolts or welding. Preferably, the output shaft of the first driving motor 2232 is coaxially fixedly connected to the driving screw 2231. A limiting rotating sleeve 2233 rotatably connected to the driving screw 2231 is also fixedly provided on the enclosure 221. The limiting rotating sleeve 2233 is located at one end of the driving screw 2231 away from the first driving motor 2232 to limit the guide block 2222 from sliding off the driving screw 2231.

[0053] Reference Figure 1 The optical solidification component 23 includes a galvanometer 231 for emitting laser light, an industrial computer 232 for controlling the galvanometer 231 to emit laser light, and a power supply 233 for providing electric energy to the galvanometer 231 and the industrial computer 232 .

[0054] The base frame 1 is provided with a top plate 12 to which the galvanometer 231 is fixedly connected and a laser partition 11 for placing an industrial computer 232 and a power supply 233. The laser partition 11 is provided with a plurality of heat dissipation holes 111.

[0055] The top plate 12 is located above the forming screen plate 21 so that the laser emitted by the galvanometer 231 can irradiate the forming screen plate 21 .

[0056] There are two laser baffles 11. The two laser baffles 11 are arranged in the vertical direction to respectively install the power supply 233 and the industrial computer 232. The two laser baffles 11 are located on one side of the width direction of the enclosure 221 and below the top plate 12, so that the optical curing component 23 can reasonably utilize the space in the base frame 1 while reducing the center of gravity of the 3D printing device to improve the stability of the base frame 1.

[0057] Reference Figure 3 The scraping assembly 24 includes a scraper 241 slidably disposed on the base frame 1 along a horizontal direction and a second driving part 242 driving the scraper 241 to slide.

[0058] The scraper 241 is arranged in a rectangular strip shape. The length direction of the scraper 241 is the same as the length direction of the enclosure 221. Both ends of the scraper 241 extend out of the outer side of the supply lifting frame 332 respectively.

[0059] Furthermore, a scraper 2411 and a positioning ejector pin 2412 are fixedly disposed on the scraper plate 241 .

[0060] The doctor blade 2411 is in the shape of a rectangular plate and is arranged vertically. The width direction of the doctor blade 2411 extends vertically, and the length direction of the doctor blade 2411 is the same as the length direction of the guide block 2222. The doctor blade 2411 is located above the forming mesh plate 21. One end of the doctor blade 2411 in the width direction is fixedly connected to the squeegee 241, and the other end of the doctor blade 2411 in the width direction is used for the doctor blade 2411 to level the resin liquid surface, that is, the lower end surface of the doctor blade 2411 contacts the resin liquid surface. The length of the doctor blade 2411 is less than the length of the guide block 2222, so that the doctor blade 2411 is located between the horizontal short sides of the two frames 2221.

[0061] The axis of the positioning thimble 2412 is arranged vertically. The lower end of the positioning thimble 2412 has a sharp end, and the sharp end of the positioning thimble 2412 faces downward to抵触 the resin liquid surface. The lowest point of the positioning thimble 2412 is flush with the lowest point of the squeegee 241.

[0062] The number of the second driving parts 242 is two groups, and the two groups of second driving parts 242 are respectively located at both ends of the squeegee 241 in the length direction. The second driving part 242 includes a driving wheel 2421 rotatably arranged on the base frame 1, a driven wheel 2422 rotatably arranged on the base frame 1, a conveyor belt 2423 wrapped between the driving wheel 2421 and the driven wheel 2422, and a second driving motor 2424 for driving the driving wheel 2421 to rotate. The axis direction of the driving wheel 2421 is the same as the length direction of the squeegee 241, and the axis direction of the driven wheel 2422 is also the same as the length direction of the squeegee 241.

[0063] Furthermore, the second driving part 242 further includes a guide rail 2425. The extending direction of the guide rail 2425 is the same as the moving direction of the conveyor belt 2423. While the end of the squeegee 241 in the length direction is fixedly connected to the conveyor belt 2423, it is slidably connected to the guide rail 2425.

[0064] The second driving motor 2424 is fixedly connected to the base frame 1 and is located at one end of the guide rail 2425 away from the enclosing plate 221. Preferably, the number of the second driving motors 2424 is one. The output shaft of the second driving motor 2424 is coaxially and fixedly connected to the driving wheels 2421 of the two groups of second driving motors 2424 at the same time, and the two groups of second driving parts 242 are combined in a "冂" shape.

[0065] Refer to Figure 1 , the supply mechanism 3 includes a liquid tank 31 for placing the molding material, a transport assembly 32 for transporting the liquid tank 31, and a supply lifting assembly 33 for lifting the liquid tank 31.

[0066] Refer to Figure 4 and Figure 5, the liquid tank 31 is used to hold the photosensitive resin. The opening of the liquid tank 31 faces upward so that the forming screen 21 can be raised and lowered into the liquid tank 31. A caster 311 is fixedly provided at the lower end of the liquid tank 31. There are four casters 311, which are respectively located at the four peripheral corners of the lower end surface of the liquid tank 31. Preferably, the caster is a Fomar wheel. A handle is fixedly provided on the liquid tank 31, and the handle is located on the side of the liquid tank close to the opening and closing door.

[0067] The transport assembly 32 includes a cart 321 for transporting the liquid tank 31, and the cart 321 has a placement space. A placement table 322 is arranged in the placement space of the cart 321. The placement table 322 is arranged in an "L" shape, so that the placement table 322 has a horizontal long section and a vertical short section. The horizontal long section of the placement table 322 conflicts with the vehicle plate of the cart 321. The vertical short section of the placement table 322 is located at the end of the horizontal long section away from the opening and closing door.

[0068] The supply lifting assembly 33 is located below the forming mesh plate 21 , and the supply lifting assembly 33 includes a lifting platform 331 for placing the liquid tank 31 and a supply lifting frame 332 for driving the lifting platform 331 to move up and down.

[0069] The upper end surface of the lifting platform 331 is provided with a guide slot 3311 for sliding the caster 311, and the opening of the guide slot 3311 is located at the end surface of the lifting platform 331 close to the forming mesh plate 21 and the end surface of the lifting platform 331 close to the trolley 321. The extension direction of the guide slot 3311 is the same as the moving direction of the conveyor belt 2423.

[0070] The lifting platform 331 is lifted to have an upper limit and a lower limit. When the lifting platform 331 is at the upper limit, the forming screen 21 is located in the liquid tank 31. When the lifting platform 331 is at the lower limit, the upper end surface of the horizontal long section of the placement platform 322 is flush with the bottom surface of the guide chute 3311.

[0071] Furthermore, an electromagnetic lock 34 for fixing the liquid tank 31 is provided on the lifting platform 331. The electromagnetic lock 34 includes an electromagnet 341 fixedly connected to the lifting platform 331 and a magnetic member 342 for cooperating with the electromagnet 341. The electromagnet 341 is located on a side of the lifting platform 331 away from the cart 321. The magnetic member 342 is located on an outer wall of the liquid tank 31 close to the electromagnet 341. Preferably, the magnetic member is a magnet or a ferromagnetic metal material.

[0072] When the lifting platform 331 rises, the electromagnet 341 is powered on to generate magnetism to magnetically adsorb the magnetic member 342, thereby limiting the sliding of the liquid tank 31 on the lifting platform 331, so as to fix the liquid tank 31 on the lifting platform 331, so that the liquid tank 31 remains stable during the lifting process. When the lifting platform 331 descends to the lower limit, the electromagnet 341 is powered off to allow the magnetic member 342 to separate from the electromagnet 341, and at this time, the moving liquid tank 31 can make the liquid tank 31 slide away from the lifting platform 331 and enter the cart 321.

[0073] Furthermore, a connecting piece 35 for fixing the placement position of the liquid tank 31 is provided on the placement platform 322. Figure 1 The connecting member 35 is a spherical buckle, which includes a main buckle end 351 and a buckled end 352 detachably connected to the main buckle end 351. The main buckle end 351 is fixedly connected to the liquid tank 31, and the buckled end 352 is located on the outer wall of the liquid tank 31 away from the electromagnet 341. The buckled end 352 is fixedly connected to the placement platform 322 and is located on the side of the vertical short section close to the lifting platform 331.

[0074] The electromagnetic lock 34 cooperates with the connecting piece 35 to ensure that the liquid tank 31 remains stable during transportation and lifting.

[0075] The supply lifting frame 332 includes a lower seat plate 3321 fixedly connected to the base frame 1 and an upper seat plate 3322 connected to the lifting platform 331. The upper seat plate 3322 is located directly above the lower seat plate 3321.

[0076] The lower seat plate 3321 is hingedly connected with a first lower hinge plate 3323 and a second lower hinge plate 3324. The rotation axis of the first lower hinge plate 3323 is parallel to the axis of the driving wheel 2421, and the rotation axis of the second lower hinge plate 3324 is parallel to the rotation axis of the driving wheel 2421. The rotation direction of the first lower hinge plate 3323 is opposite to that of the second lower hinge plate 3324.

[0077] The upper seat plate 3322 is hingedly connected with a first upper hinge plate 3325 and a second upper hinge plate 3326. The rotation axis of the first upper hinge plate 3325 is parallel to the axis of the driving wheel 2421, and the rotation axis of the second upper hinge plate 3326 is parallel to the rotation axis of the driving wheel 2421. The rotation direction of the first upper hinge plate 3325 is opposite to that of the second upper hinge plate 3326.

[0078] One end of the first lower hinge plate 3323 is hingedly connected to the first connecting block 3327, and the first connecting block 3327 is hingedly connected to the first upper hinge plate 3325. The rotation axis of the first lower hinge plate 3323 on the first connecting block 3327 coincides with the rotation axis of the first upper hinge plate 3325 on the first connecting block 3327.

[0079] One end of the second lower hinge plate 3324 is hingedly connected to the second connecting block 3328, and the second connecting block 3328 is hingedly connected to the second lower hinge plate 3324. The rotation axis of the second lower hinge plate 3324 on the second connecting block 3328 coincides with the rotation axis of the second upper hinge plate 3326 on the second connecting block 3328.

[0080] Further, the first connection block 3327 is provided with a pitch adjusting portion 333 for driving the second connection block 3328 to move closer or farther away. The pitch adjusting portion 333 includes a pitch adjusting screw 3331 threadedly connected to the first connection block 3327 and a pitch adjusting motor 3332 for driving the pitch adjusting screw 3331 to rotate. The pitch adjusting motor 3332 is fixedly connected to the first connection block 3327. Preferably, the output shaft of the pitch adjusting motor 3332 and the pitch adjusting screw 3331 are driven by two mutually meshing gears.

[0081] The axis of the pitch adjusting screw 3331 is arranged in the horizontal direction, and the extending direction is the same as the extending direction of the guide rail 2425. The pitch adjusting screw 3331 has a first thread segment and a second thread segment, and the rotation direction of the first thread segment is opposite to the rotation direction of the second thread segment so that the sliding direction of the first connecting block 3327 and the sliding direction of the second connecting block 3328 are opposite. The pitch adjusting motor 3332 drives the pitch adjusting screw 3331 to rotate so that the first connecting block 3327 and the second connecting block 3328 are closer to each other or farther away from each other. The first thread segment is threadedly connected to the first connecting block 3327, and the second thread segment is threadedly connected to the second connecting block 3328.

[0082] Alternatively, the pitch-adjusting screw 3331 has only a first thread segment, the first thread segment is threadedly connected to the first connecting block 3327, the second connecting block 3328 is rotationally connected to the pitch-adjusting screw 3331, and the position of the second connecting block 3328 on the axis of the pitch-adjusting screw 3331 remains unchanged.

[0083] Alternatively, the pitch-adjusting screw 3331 has only a second thread segment, the second thread segment is threadedly connected to the first connecting block 3327, the first connecting block 3327 is rotationally connected to the pitch-adjusting screw 3331, and the position of the first connecting block 3327 on the axis of the pitch-adjusting screw 3331 remains unchanged.

[0084] The distance adjusting part 333 makes the first connecting block 3327 and the second connecting block 3328 move closer to each other so that the upper seat plate 3322 and the lower seat plate 3321 move away from each other, thereby driving the lifting platform 331 to rise. The distance adjusting part 333 makes the first connecting block 3327 and the second connecting block 3328 move away from each other so that the upper seat plate 3322 and the lower seat plate 3321 move closer to each other, thereby driving the lifting platform 331 to rise.

[0085] Furthermore, the supply lifting frame 332 further includes a guide limiter 334 for limiting the sliding of the lifting platform 331. There are two groups of guide limiters 334, and the two groups of guide limiters 334 are respectively located below the two groups of second driving parts 242. The liquid tank 31 slides between the two groups of guide limiters 334 under the action of the supply lifting frame 332.

[0086] The guide limiting portion 334 includes a light rod 3341 fixedly arranged on the base frame 1 and an upper limit plate 3342 fixedly arranged on the upper end of the light rod 3341. The light rod 3341 and the upper limit plate 3342 are connected by bolts or welding. The upper limit plate 3342 is arranged in the shape of a rectangular long plate. The length direction of the upper limit plate 3342 is the same as the extended square of the guide slide groove 3311. One end of the upper limit plate 3342 away from the liquid tank 31 in the width direction is fixedly connected to the base frame 1 by bolts or welding. There are two light rods 3341, and the two light rods 3341 are respectively located at both ends of the length direction of the upper limit plate 3342. The light rod 3341 is arranged in the vertical direction. The lifting platform 331 is located below the upper limit plate 3342. The light rod 3341 passes through the lifting platform 331, and the lifting platform 331 is slidably connected to the light rod 3341.

[0087] Furthermore, the supply mechanism 3 also includes a temperature control component 36 for controlling the temperature around the lifting platform 331. The temperature control component 36 includes three insulation plates 361 arranged around the outside of the lifting platform 331. There are three insulation plates 361, one of which is located on the side of the lifting platform 331 away from the cart 321, and the remaining two insulation plates 361 are respectively located on the side of the two groups of second driving parts 242 away from the lifting platform 331.

[0088] Reference Figure 1 , a heating element 362 is fixedly provided on one side of one of the insulation plates 361. The heating element 362 is located on the side of the laser partition 11 away from the liquid tank 31. The insulation plate 361 is provided with a heat conduction hole. The heat generated by the heating element 362 and the heat generated by the photocuring component 23 can be introduced into the environment around the liquid tank 31 by means of a fan or the like. Preferably, the heating element 362 is an electric heating oil radiator. The heating element 362 generates heat to increase the temperature around the lifting platform 331, so that the resin in the liquid tank 31 is maintained at the most suitable temperature. It is worth mentioning that some types of existing photosensitive resins are liquids at room temperature. Therefore, the heating element 362 heats the lifting platform 331 to keep the temperature around it between 30°C and 50°C.

[0089] The implementation principle of this embodiment is:

[0090] The supply lifting frame 332 is lowered so that the lifting platform 331 is located at the lower limit position, the trolley 321 is moved to the side of the base frame 1 so that the upper end surface of the horizontal long section of the placement platform 322 is flush with the bottom surface of the guide groove 3311 of the lifting platform 331, the liquid tank 31 is moved so that the caster 311 enters the lifting platform 331 along the guide groove 3311, and then the supply lifting frame 332 is raised so that the lifting platform 331 is located at the upper limit position, thereby completing the installation of the liquid tank 31;

[0091] The first driving motor 2232 drives the driving screw 2231 to rotate so that the screen lifting frame 222 drives the forming screen 21 to move up and down along the lifting guide rail 2211 so that the forming screen 21 is immersed in the resin of the liquid tank 31, and the light curing component 23 emits laser to light-cure the resin on the forming screen 21, and then the forming lifting component 22 drives the forming screen 21 to descend again, and the leveling component 24 levels the resin liquid surface, and the light curing component 23 emits laser again to light-cure the resin and stack it on the previous layer of light-cured resin, and the above steps are repeated until the actual required product is obtained, thereby completing printing;

[0092] When replacing the liquid tank 31, the pitch adjusting motor 3332 rotates to rotate the pitch adjusting screw 3331, so that the first connecting block 3327 and the second connecting block 3328 are close to each other, thereby making the lower seat plate 3321 and the upper seat plate 3322 move away from each other to make the lifting platform 331 rise until the resin liquid level in the liquid tank 31 is higher than the upper end surface of the molding mesh plate 21.

[0093] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D printing device capable of quickly replacing a liquid tank, comprising a base frame (1), characterized in that: The base frame (1) is provided with a molding mechanism (2) and a supply mechanism (3) for supplying molding material to the molding mechanism (2); The molding mechanism (2) comprises a molding screen (21), a molding lifting component (22) for driving the molding screen (21) to move up and down, a light-curing component (23) for light-curing molding, and a scraping component (24) for scraping resin. The supply mechanism (3) comprises a liquid tank (31) containing molding material, a transport component (32) for transporting the liquid tank (31), and a supply lifting component (33) for lifting the liquid tank (31); The supply lifting assembly (33) is located below the forming mesh plate (21), and comprises a lifting platform (331) for placing the liquid tank (31) and a supply lifting frame (332) for driving the lifting platform (331) to move up and down, the lifting platform (331) is lifted and lowered to have an upper limit position and a lower limit position, and when the lifting platform (331) is at the upper limit position, the forming mesh plate (21) is located in the liquid tank (31); The transport component (32) comprises a trolley (321) for transporting the liquid tank (31), the trolley (321) having a placement space, and the lifting platform (331) is in communication with the placement space of the trolley (321) when the lifting platform (331) is in the lower limit position; An electromagnetic lock (34) for fixing the liquid tank (31) is arranged on the lifting platform (331), and the electromagnetic lock (34) comprises an electromagnet (341) fixedly connected to the lifting platform (331) and a magnetic member (342) for cooperating with the electromagnet (341), and the magnetic member (342) is located on the liquid tank (31); A caster (311) is fixedly provided at the lower end of the liquid tank (31), and a guide slide groove (3311) for the caster (311) to move is provided on the lifting platform (331), and the opening of the guide slide groove (3311) is located at the end surface of the lifting platform (331) close to the forming mesh plate (21) and the end surface of the lifting platform (331) close to the cart (321); The supply lifting frame (332) comprises a lower seat plate (3321) fixedly connected to the base frame (1) and an upper seat plate (3322) connected to the lifting platform (331), the lower seat plate (3321) being hingedly connected to a first lower hinge plate (3323) and a second lower hinge plate (3324), the upper seat plate (3322) being hingedly connected to a first upper hinge plate (3325) and a second upper hinge plate (3326), the first lower hinge plate (3323) being hingedly connected to a first lower hinge plate (3323) and a second lower hinge plate (3324), One end is hingedly connected to a first connection block (3327), the first connection block (3327) is hingedly connected to the first upper hinge plate (3325), one end of the second lower hinge plate (3324) is hingedly connected to a second connection block (3328), the second connection block (3328) is hingedly connected to the second lower hinge plate (3324), and the first connection block (3327) is provided with a distance adjustment portion (333) for driving the second connection block (3328) to move closer or farther away; The pitch adjusting portion (333) includes a pitch adjusting screw (3331) threadedly connected to the first connecting block (3327) and a pitch adjusting motor (3332) for driving the pitch adjusting screw (3331) to rotate, wherein the pitch adjusting motor (3332) is fixedly connected to the first connecting block (3327), and the pitch adjusting screw (3331) has a first thread segment and a second thread segment, wherein the rotation direction of the first thread segment is opposite to that of the second thread segment, the first thread segment is threadedly connected to the first connecting block (3327), and the second thread segment is threadedly connected to the second connecting block (3328).

2. A 3D printing device capable of quickly replacing a liquid tank according to claim 1, characterized in that: A placement platform (322) is arranged in the placement space of the trolley (321), the upper end surface of the placement platform (322) is flush with the upper end surface of the lifting platform (331) when the lifting platform (331) is at the lower limit position, and a connecting piece (35) for fixing the placement position of the liquid tank (31) is arranged on the placement platform (322), and the connecting piece (35) comprises a main buckle end (351) and a buckled end (352) detachably connected to the main buckle end (351), the buckled end (352) is fixedly connected to the placement platform (322), and the main buckle end (351) is fixedly connected to the liquid tank (31).

3. A 3D printing device capable of quickly replacing a liquid tank according to claim 1, characterized in that: The supply lifting frame (332) also includes a guide limiting portion (334) for limiting the sliding of the lifting platform (331), and the guide limiting portion (334) includes a light rod (3341) fixedly arranged on the base frame (1), and the light rod (3341) is arranged in a vertical direction. The light rod (3341) passes through the lifting platform (331), and the lifting platform (331) is slidably connected to the light rod (3341).

4. A 3D printing device capable of quickly replacing a liquid tank according to claim 3, characterized in that: An upper limit plate (3342) is fixedly arranged on the bare rod (3341), and the lifting platform (331) is located below the upper limit plate (3342).

5. A 3D printing device capable of quickly replacing a liquid tank according to claim 1, characterized in that: The supply mechanism (3) further comprises a temperature control component (36) for controlling the temperature around the lifting platform (331), wherein the temperature control component (36) comprises a heat preservation plate (361) which is arranged on three sides around the outside of the lifting platform (331), and a heating element (362) is fixedly arranged on one side of the heat preservation plate (361).

Images