A material cylinder for a stereolithography printer

Abstract

The present invention discloses a material cylinder for a stereolithography printer, belonging to the field of photocuring printing technology, comprising a material tank body, wherein the bottom of the material tank body is connected to a material feed cover, the material feed cover is connected to connecting sleeves on all sides through connecting branches, and a material trough is connected between the multiple connecting sleeves, the inner cavity of the material tank body is rotatably connected to a feed pipe, the inner cavity of the material tank body is fixedly installed with a partition plate mechanism for sealing the chambers on both sides of the feed stroke, the feed pipe is rotatably connected within the partition plate mechanism, and a two-way discharge pipe is connected between the opposite sides of the inner cavity of the feed pipe. In the present invention, when the feed pipe is rotated forward or reverse, the feed liquid can be replaced, and the rotating feed pipe is used to achieve the discharge of one or two photocuring liquid combinations, which is conducive to the layer-by-layer replacement and loading of the liquid during photocuring, improves the efficiency of replacing and loading the raw materials and colors of the photocurable printing components, and is conducive to improving the scalability and adaptability of customized printing.

Description

Technical Field

[0001] The invention belongs to the technical field of photocuring printing, and in particular relates to a material cylinder for a stereophotocuring printer. Background Art

[0002] With the development of science and technology, 3D printing technology has gradually matured. Traditional 3D printing is a rapid prototyping method that uses heated soluble filament to extrude and deposit layer by layer through a nozzle. However, this method suffers from poor controllability, easy nozzle clogging, and poor printing accuracy, which affects the printing effect. Stereolithography 3D printing technology uses a computer-controlled ultraviolet light beam to selectively cure photosensitive resin layer by layer. The displacement of the platform in the z-axis is controlled to cure the next layer of photosensitive resin on top of the previous layer, thus completing the printing of the 3D printed part.

[0003] Since the photosensitive resin material cannot be exposed to external ultraviolet light during the photocuring 3D printing process, it is inconvenient to load the photosensitive resin raw material. Traditional photocuring equipment mostly pours the photosensitive resin into a material trough and prints it layer by layer through the action of gravity. It is disposable and easy to be mixed with waste debris that falls off after partial curing during subsequent recycling. Chinese patent CN212764807U discloses an adjustable material cylinder for a stereoscopic photocuring 3D printer, including a cylinder body, a first gear roller is provided in the inner cavity of the cylinder body, a second gear roller is installed on one side of the first gear roller, a first guide plate is symmetrically installed above the second gear roller, a material receiving trough is installed below the second gear roller, the outer wall of the material receiving trough is connected to a vibration motor by screws, a spring seat is installed below the material receiving trough, a metal screen is fixedly connected to the bottom of the inner cavity of the material receiving trough, and the bottom of the inner cavity of the cylinder body is provided with a metal screen. A second guide plate is symmetrically fixedly connected, and an electric heating plate is installed on the lower surface of the second guide plate. This solution reduces the volume of the resin raw material by crushing it, accelerates the melting rate of the resin raw material, and vibrates and screens the resin raw material through a metal screen to make the raw material evenly distributed on the surface of the second guide plate. This solution realizes feeding during the printing process by heating the resin raw material, but there are still certain problems. For example, there is only one outlet for the resin raw material. After the resin raw material flows out through the outlet, it still flows by gravity and fluid force. When printing larger components, it is still necessary to wait for the resin filling time, and the type of raw material resin filled in the material tank is single, resulting in the printed parts having the same color and material. When the printed component requires a certain color combination, it is necessary to stop the machine and wait for the replacement of the raw material tank and the material trough. The processing efficiency is low and cannot meet the use needs well. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of low material filling efficiency in stereolithography printing and to propose a material cylinder for a stereolithography printer.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A material cylinder for a stereolithography printer comprises a material tank body, the bottom of the material tank body is connected to a material feed cover, the material feed cover is connected to a connecting sleeve on all sides through a connecting branch pipe, and a material trough is connected between the multiple connecting sleeves, the inner cavity of the material tank body is rotatably connected to a feed pipe, the inner cavity of the material tank body is fixedly installed with a partition plate mechanism for closing the chambers on both sides of the stroke, the feed pipe is rotatably connected in the partition plate mechanism, two opposite sides of the inner cavity of the feed pipe are connected to a double-way discharge pipe, and the other side of the feed pipe is opposite to the double-way discharge pipe. A lateral downpipe is embedded in the side wall, and the bottoms of the double-way downpipe and the lateral downpipe extend to the bottom of the feed pipe, and a mixing mechanism is fixedly installed at the bottom of the feed pipe, and the mixing mechanism is located in the inner cavity of the feed hood. The partition plate mechanism includes a transfer pipe, and the transfer pipe is sleeved on the outside of the feed pipe. Partition plates are fixedly connected on both sides of the transfer pipe, and the partition plates are fixedly connected to the corresponding positions on both sides of the inner cavity of the tank body. A discharge hole is provided on one side of the transfer pipe that is perpendicular to the partition plate in the horizontal direction, which is used for connecting with the feed hole at the corresponding position to supply material after the feed pipe is rotated.

[0007] As a further description of the above technical solution:

[0008] The outer side wall of the feed pipe is transmission-connected with a driving mechanism, and the driving mechanism includes a driven gear clamped on the outside of the feed pipe, one side of the driven gear is meshed with a driving rack, and one side of the driving rack is fixedly installed with a control cylinder, and the control cylinder is fixedly installed on the top of the material cover threadedly connected to the top of the material tank body, and is used to drive the driven gear and the feed pipe to rotate through the movement of the driving rack to control the material discharge connection position.

[0009] As a further description of the above technical solution:

[0010] The driving mechanism also includes a limiting ring embedded in the top of the feed pipe, a plurality of knocking rods are fitted in the inner cavity of the limiting ring, and a connecting plate is fixedly connected between the plurality of knocking rods through an axis, a fixing column is fixedly connected to the bottom of the other side of the connecting plate, and the bottom end of the fixing column is fixedly connected to the top of the material tank body, and a plurality of protrusions are fixedly connected to the inner cavity of the limiting ring, which is used to drive the feed pipe to vibrate and make the liquid flow through the contact between the knocking rod and the protrusion.

[0011] As a further description of the above technical solution:

[0012] A sealing gasket is embedded in the outer wall of the feed pipe, close to the outer wall of the two-way discharge pipe and at a corresponding position on one side of the discharge pipe, and the sealing gasket fits in the inner cavity of the transfer pipe.

[0013] As a further description of the above technical solution:

[0014] A plurality of heat dissipation fins are fixedly connected to the outer wall of the material transfer tube, and the outer surfaces of the heat dissipation fins are chamfered.

[0015] As a further description of the above technical solution:

[0016] A melt kettle is fixedly installed in the cavities on both sides of the inner cavity of the material tank body, and a discharge protrusion is fixedly connected to the bottom of the melt kettle. An electric heating rod for melting the material is fixedly installed in the inner cavity of the melt kettle, and feeding valve ports are embedded in the positions corresponding to the melt kettle on both sides of the top of the material tank body.

[0017] As a further description of the above technical solution:

[0018] The mixing mechanism includes a mixing seat, which is fixedly connected to the bottom of the feed pipe, and the bottoms of the double-way discharge pipe and the side discharge pipe both extend into the mixing seat. The inner cavity of the mixing seat is rotatably connected to a spiral blade through a bearing, and multiple material nozzles are provided around the outer wall of the mixing seat for mixing the material liquid after discharge through the spiral blade and then spraying it to the nozzles around it.

[0019] As a further description of the above technical solution:

[0020] The material trough includes an internal chamber for the movement of feed liquid and a middle cavity for curing and molding composed of an inner wall, and a liquid supply trough hole is opened between the internal chamber of the material trough and the middle cavity of the material trough, which is used to feed the curing liquid into the middle cavity area of ​​the material trough and cure it through irradiation on the bottom curing table. The top of the material trough is connected to a pressure ring through a pipe body on all four sides, and the pressure ring is connected to the external pressure equipment through an air blowing pipe.

[0021] As a further description of the above technical solution:

[0022] One side of the material trough is fixedly mounted to one side of a Z-axis moving component of an external light-curing printer through a connecting column.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In the present invention, after the photosensitive resin liquid is placed in the area on both sides of the partition plate, the feed pipe is driven to rotate by controlling the driving mechanism. The rotation of the feed pipe can drive the bottom double-way feed pipe and the side feed pipe to rotate, so that the side feed pipe or the double-way feed pipe can be connected to the discharge holes on both sides of the transfer tank in one direction or two directions, so that the liquid on one side or both sides of the tank body enters the transfer pipe and is mixed by the bottom mixing mechanism and then sent into the feed cover and the material trough. After a single layer of light curing, the feed pipe can be rotated forward or reversely to replace the fed liquid. The rotating feed pipe can realize the discharge of one or two combinations of light curing liquids, which is conducive to replacing and loading the liquid layer by layer during light curing, improving the efficiency of replacing and loading the raw materials and colors of the light-curing printing components, and improving the scalability and adaptability of customized printing.

[0025] 2. In the present invention, after the photocurable liquid enters the material feed cover, the photocurable liquid can evenly enter the chamber where the material feed liquid moves inside the material tank through the connecting branch pipe and the connecting sleeve. The material liquid can enter the cavity between the middle parts of the material tank through the liquid feed tank hole. Under the action of the pressure ring, the material liquid flow uniformity and material discharge efficiency are improved by negative pressure suction and then pressurization, thereby improving the material loading efficiency during photocuring layer-by-layer printing, and facilitating the replacement of the material liquid layer by layer. Compared with the traditional separately placed material pipes and material tanks, the processing efficiency of material change printing during stereo photocuring printing is further improved.

[0026] 3. In the present invention, through the designed mixing mechanism, when the photocurable liquid enters through the double-way discharge pipe, the liquid on both sides of the two-way feeding can be mixed by the contact flow with the top of the spiral sheet during discharge, thereby improving the uniformity of raw material mixing during double-sided feeding. Moreover, when the feed pipe rotates, the inner cavity limit ring of the feed pipe can vibrate through the contact with the outside of the knocking rod through the protrusion, and after being transmitted to the bottom material tank body and the two sides of the fitted melt kettle, the photocurable material that has not been completely melted in the melt kettle can be further collapsed and melted, thereby improving the flow efficiency of the photocurable liquid at the bottom of the material tank body through vibration, and further improving the flow speed of the material liquid in the material tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a material cylinder for a stereolithography printer proposed by the present invention;

[0028] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the enlarged part A;

[0029] Figure 3 This is a schematic diagram of the explosive disassembly structure of a material cylinder for a stereolithography printer proposed by the present invention;

[0030] Figure 4This is a schematic side half-section structure diagram of a material cylinder for a stereolithography printer proposed by the present invention;

[0031] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the enlarged portion B;

[0032] Figure 6 This is a schematic diagram of the overall structure of a mixing mechanism for a material cylinder of a stereolithography printer proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the side structure of a material cylinder for a stereolithography printer proposed by the present invention;

[0034] Figure 8 This is a schematic diagram of the top view of the material cylinder for a stereolithography printer proposed by the present invention.

[0035] Legend:

[0036] 1. Material tank body; 2. Material trough; 3. Material inlet cover; 4. Driving mechanism; 401. Driving rack; 402. Driven gear; 403. Control cylinder; 404. Fixed column; 405. Connecting plate; 406. Knocking rod; 407. Limiting ring; 5. Partition plate mechanism; 501. Partition plate; 502. Material transfer pipe; 503. Discharge hole; 6. Melting kettle; 7. Feeding pipe; 8. Mixing mechanism; 801. Mixing seat; 802. Spiral sheet; 803. Nozzle; 9. Feeding valve port; 10. Pressurizing ring; 11. Blowing pipe; 12. Connecting column; 13. Double-way discharge pipe; 14. Lateral discharge pipe; 15. Connecting sleeve; 16. Connecting branch pipe; 17. Liquid supply tank hole. DETAILED DESCRIPTION

[0037] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] See also Figure 1-8The present invention provides a technical solution: a material cylinder for a stereolithography printer, comprising a material tank body 1, the bottom of the material tank body 1 is connected to a material feeding cover 3, the material feeding cover 3 is connected to a connecting sleeve 15 on all sides through a connecting branch pipe 16, and a material trough 2 is connected between the multiple connecting sleeves 15, the inner cavity of the material tank body 1 is rotatably connected to a feeding pipe 7, the inner cavity of the material tank body 1 is fixedly installed with a partition plate mechanism 5 for closing the accommodating chambers on both sides of the stroke, the feeding pipe 7 is rotatably connected in the partition plate mechanism 5, a double-way discharge pipe 13 is connected between the opposite sides of the inner cavity of the feeding pipe 7, and a side discharge pipe 14 is embedded in the other side of the feeding pipe 7 relative to the side wall position of the double-way discharge pipe 13, the bottom of the double-way discharge pipe 13 and the side discharge pipe 14 both extend to the bottom of the feeding pipe 7, and a mixing mechanism 8 is fixedly installed at the bottom of the feeding pipe 7, and the mixing mechanism 8 is located in the inner cavity of the feeding cover 3, the feeding The outer wall of the tube 7 is transmission-connected with a driving mechanism 4, which includes a driven gear 402 that is clamped on the outside of the feed pipe 7, and a driving rack 401 is meshed on one side of the driven gear 402. A control cylinder 403 is fixedly installed on one side of the driving rack 401, and the control cylinder 403 is fixedly installed on the top of the material cover threadedly connected to the top of the material tank body 1, and is used to drive the driven gear 402 and the feed pipe 7 to rotate and control the material discharge connection position through the movement of the driving rack 401. The partition plate mechanism 5 includes a material transfer pipe 502, which is sleeved on the outside of the feed pipe 7, and both sides of the material transfer pipe 502 are fixedly connected with partition plates 501, and the partition plates 501 are fixedly connected to the corresponding positions on both sides of the inner cavity of the material tank body 1. A discharge hole 503 is provided on one side of the material transfer pipe 502 in the horizontal direction perpendicular to the partition plate 501, which is used to connect with the corresponding position feed hole to supply material after the feed pipe 7 is rotated.

[0039] The specific implementation method is as follows: after the material tank body 1 is installed with the light curing machine, when printing is required, after the cover body is opened by twisting the material cover on the top of the material tank body 1, the cover body can be selected to be snap-on or threaded, which is convenient for opening and adding materials, or a feeding valve port 9 is directly set on the top of the material cover for adding materials. When solid photosensitive resin is added, a certain amount of gas will be generated after melting, and a ventilation mechanism needs to be set to remove it. The molten light curing liquid, i.e., photosensitive resin, is added to the cavities on both sides of the material tank body 1 respectively. When the photosensitive resin liquid is placed in the area on both sides of the partition plate 501, the driving mechanism 4 is controlled to control the liquid. The cylinder 403 works, and the control cylinder 403 can pull the driving rack 401 to drive the driven gear 402 and the feed pipe 7 to rotate. The rotation of the feed pipe 7 can drive the bottom double-way discharge pipe 13 and the side discharge pipe 14 to rotate, so that the side discharge pipe 14 or the double-way discharge pipe 13 can be connected to the discharge holes 503 on both sides of the transfer tank in one direction or two directions, so that the material liquid on one side or both sides of the tank body 1 enters the transfer pipe 502 and is mixed by the bottom mixing mechanism 8 and then sent to the feed cover 3 and the material trough 2, and is cured in a single layer by the light curing component at the bottom of the light curing machine;

[0040] Among them, the light curing component is generally a screen that can emit ultraviolet curing light, and the shape of the cured layer is adjusted by changing the image displayed on the screen;

[0041] After a single layer is cured, the feed tube 7 is driven to rotate forward or reverse by controlling the extension or contraction of the cylinder 403. At this time, the incoming liquid can be replaced, thereby enabling the discharge of one or two combinations of light-curing liquids through the rotating feed tube 7. This facilitates the layer-by-layer replacement and loading of liquids during light-curing, improving the efficiency of replacing and loading the raw materials and colors of light-curable printed components, and facilitating the scalability and adaptability of customized printing. Specifically, the dual-channel discharge tube 13 can simultaneously feed different light-curing liquids on both sides of the partition plate 501 into the dual-channel discharge tube 13, facilitating the mixing of the light-curing liquids on both sides to obtain a third light-curing liquid.

[0042] Furthermore, the photocurable liquid added to the inner cavity of the tank body 1 on both sides of the partition plate 501 can be of different colors to be mixed to obtain three colors, or photocurable liquids with different curing times or hardness after curing can be selected to obtain photocurable printed components with different levels of hardness after curing.

[0043] At the same time, a sealing gasket is embedded in the outer wall of the feed pipe 7 near the outer wall of the double-way discharge pipe 13 and the corresponding position on the side of the side discharge pipe 14, and the sealing gasket fits the inner cavity of the transfer pipe 502. The designed sealing gasket can seal the gap between the double-way discharge pipe 13 on the bottom side of the feed pipe 7 and the opening on one side of the side discharge pipe 14 and the discharge hole 503 to avoid the penetration of the feed liquid during rotation.

[0044] In another embodiment, see Figure 1 and Figure 3-4 The material tank 2 includes an internal chamber for the movement of the feed liquid and a middle cavity for curing and molding composed of an inner wall, and a liquid feed slot hole 17 is opened between the internal chamber of the material tank 2 and the middle cavity of the material tank 2, which is used to feed the curing liquid into the middle cavity area of ​​the material tank 2 and cure it through the bottom curing table. The top of the material tank 2 is connected to a pressure ring 10 through a pipe body, and the pressure ring 10 is connected to the external pressure equipment through an air blowing pipe 11. One side of the material tank 2 is fixedly installed with one side of the Z-axis moving component of the external light-curing printer through a connecting column 12;

[0045] The specific implementation method is as follows: after the photocuring liquid enters the feed cover 3, the photocuring liquid can evenly enter the chamber where the feed liquid moves inside the material tank 2 through the connecting branch pipe 16 and the connecting sleeve 15, and then the material liquid can enter the middle cavity of the material tank 2 through the liquid supply slot hole 17. At the same time, in order to ensure the flow efficiency, the material liquid can be quickly and evenly sucked in by the negative pressure suction device outside the pressure ring 10. Among them, the annular pressure ring 10 can evenly suck the gas into the middle cavity of the material tank 2 through the tube body around the bottom of the pressure ring 10, and in order to ensure the sealing effect of the internal space, a sealing cover should be provided on the top of the middle cavity of the material tank 2, and it should be connected to the pressure ring 10 through a pipeline to ensure the pressure treatment effect.

[0046] Among them, in the natural flow state, in order to ensure that the slurry fully flows through the surface of the cured component, the pressure suction equipment can be used to pressurize the slurry so that the slurry can flow fully, so that through the designed trough 2, the slurry can flow evenly into the trough 2 around the trough through the material inlet cover 3, thereby improving the uniformity of the slurry flow, and under the action of the pressure ring 10, the negative pressure suction and then pressurization can be used to improve the uniformity of the slurry flow and the feeding efficiency, thereby improving the feeding efficiency during light-curing layer-by-layer printing, which is conducive to assisting the replacement of the slurry layer by layer, and further improving the processing efficiency of material change printing.

[0047] See also Figure 1-4 The cam 406 is fixedly connected to the top of the feed pipe 7 by a shaft, and the bottom of the other side of the connecting plate 405 is fixedly connected to the fixing column 404, and the bottom end of the fixing column 404 is fixedly connected to the top of the tank body 1. The inner cavity of the limiting ring 407 is fixedly connected to a plurality of protrusions, which are used to drive the feed pipe 7 to vibrate and make the material flow through the contact between the knocking rod 406 and the protrusion. The melt kettle 6 is fixedly installed in the cavities on both sides of the inner cavity of the tank body 1, and the bottom of the melt kettle 6 is fixedly connected to a discharge protrusion. The inner cavity of the melt kettle 6 is fixedly installed with an electric heating rod for melting the material. The positions of the melt kettle 6 on both sides of the top of the tank body 1 corresponding to the melt kettle 6 are embedded with feeding valve ports 9. The outer wall of the transfer tube 502 is fixedly connected to a plurality of heat dissipation fins, and the outer surface of the heat dissipation fins is chamfered.

[0048] The specific implementation method is as follows: through the designed driving mechanism 4, when the feeding tube 7 rotates, the inner cavity limiting ring 407 of the feeding tube 7 can contact the outside of the knocking rod 406 through the protrusion. At this time, the protrusion can transmit the knocking force to the limiting ring 407 and the feeding tube 7. After the feeding tube 7 vibrates, it can be transmitted to the bottom material tank body 1 and the two sides of the fitting melt kettle 6, so that the vibration of the feeding tube 7 can make the unmelted photocuring material in the melt kettle 6 further collapse and melt, thereby improving the melting efficiency, and can improve the flow efficiency of the photocuring liquid at the bottom of the material tank body 1 through vibration, further improving the feeding flow speed.

[0049] See also Figure 4-6 The mixing mechanism 8 includes a mixing seat 801, which is fixedly connected to the bottom of the feed pipe 7, and the bottoms of the double-way discharge pipe 13 and the side discharge pipe 14 both extend into the mixing seat 801. The inner cavity of the mixing seat 801 is rotatably connected to a spiral piece 802 through a bearing. A plurality of material nozzles are provided around the outer wall of the mixing seat 801, which are used to mix the material liquid after discharge through the spiral piece 802 and then spray it to the nozzles 803 around it.

[0050] The specific implementation method is as follows: through the designed mixing mechanism 8, when the light-curing liquid enters through the two-way discharge pipe 13, the liquids on both sides of the two-way feed can be mixed by contact flow with the top of the spiral blade 802 during discharge, and after being sprayed out through the nozzle on the side of the mixing seat 801, they can flow into the surrounding connecting branch pipes 16 through the material inlet cover 3. Among them, the nozzle is preferably an electromagnetically controlled spray nozzle to facilitate the control of spraying, feeding, opening and closing, and efficiency, to avoid the inability to store the liquid in the material tank body 1 after shutdown, and the material tank body 1 needs to use an opaque tank body to prevent external light from causing the liquid to solidify;

[0051] In order to ensure the flow efficiency of the liquid, the bottom of the feed cover 3 is set to be conical to ensure the circulation effect.

[0052] Working principle: When in use, after the cover body is opened by twisting the top cover of the material tank body 1, the molten light-curing liquid, i.e., photosensitive resin, is added to the cavities on both sides of the material tank body 1 respectively. When the photosensitive resin liquid is placed in the areas on both sides of the partition plate 501, the cylinder 403 is controlled to work by controlling the driving mechanism 4, and the cylinder 403 is controlled to pull the driving rack 401 to drive the driven gear 402 and the feed pipe 7 to rotate. The rotation of the feed pipe 7 drives the bottom two-way discharge pipe 13 and the side discharge pipe 14 to rotate. The side discharge pipe 14 or the two-way discharge pipe 13 is connected to the discharge holes 503 on both sides of the transfer tank in one direction or two directions. The liquid on one side or both sides of the material tank body 1 enters the transfer pipe 502 and is mixed by the bottom mixing mechanism 8 and then sent into the feed cover 3 and the material trough 2;

[0053] When the feed tube 7 rotates, the inner cavity limiting ring 407 of the feed tube 7 contacts the outer portion of the knocking rod 406 through the protrusion. At this time, the protrusion transmits the knocking force to the limiting ring 407 and the feed tube 7. After the feed tube 7 vibrates, the force is transmitted to the bottom tank body 1 and the two sides of the attached melt kettle 6. The vibration of the feed tube 7 causes the unmelted light-curing material in the melt kettle 6 to further collapse and melt.

[0054] When the light-curing liquid enters through the double-way feed pipe 13, the liquid on both sides of the two-way feed is mixed by contact flow with the top of the spiral blade 802 during the discharge, and is sprayed out through the nozzle on the side of the mixing seat 801, and then flows through the feed cover 3 into the surrounding connecting branch pipes 16;

[0055] After the light-curing liquid enters the feed cover 3, it evenly enters the chamber where the feed liquid moves inside the material tank 2 through the connecting branch pipe 16 and the connecting sleeve 15. Then, the material liquid enters the middle cavity of the material tank 2 through the liquid supply slot hole 17. The material liquid is quickly and evenly sucked in by the negative pressure suction device outside the pressure ring 10. The pressure suction device pressurizes the material liquid to fully flow, and the gas is evenly sucked into the middle cavity of the material tank 2 through the tube body around the bottom of the pressure ring 10;

[0056] A single layer of curing is performed through the light curing assembly at the bottom of the light curing machine. After the single layer is cured, the feed pipe 7 is driven to rotate forward or reverse by controlling the extension or contraction of the cylinder 403. At this time, the feeding liquid is replaced, and the printing contact hand is printed multiple times to separate the printed component from the bottom of the middle cavity of the material trough 2. After printing is completed, the liquid in the material tank body 1 is emptied for flushing or directly placed for next use.

[0057] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A material tank for a stereolithography printer, comprising a material tank body (1), characterized in that: The bottom of the tank body (1) is connected to a feed cover (3), and the feed cover (3) is connected to a connecting sleeve (15) on all sides through a connecting branch pipe (16), and a plurality of connecting sleeves (15) are connected to a material trough (2). The inner cavity of the tank body (1) is rotatably connected to a feed pipe (7), and a partition plate mechanism (5) for closing the accommodating chambers on both sides of the stroke is fixedly installed in the inner cavity of the tank body (1). The feed pipe (7) is rotatably connected in the partition plate mechanism (5), and a double-way discharge pipe (13) is connected between the opposite sides of the inner cavity of the feed pipe (7), and a side discharge pipe (14) is embedded in the other side of the feed pipe (7) relative to the side wall of the double-way discharge pipe (13). The double-way discharge pipe (14) is connected to the inner cavity of the feed pipe (7). The bottoms of the material pipe (13) and the lateral downward material pipe (14) both extend to the bottom of the feed pipe (7), and a mixing mechanism (8) is fixedly installed at the bottom of the feed pipe (7), and the mixing mechanism (8) is located in the inner cavity of the feed cover (3). The partition plate mechanism (5) includes a transfer pipe (502), and the transfer pipe (502) is sleeved on the outside of the feed pipe (7). Both sides of the transfer pipe (502) are fixedly connected with a partition plate (501), and the partition plate (501) is fixedly connected to the corresponding positions on both sides of the inner cavity of the tank body (1). A discharge hole (503) is opened on one side of the transfer pipe (502) perpendicular to the partition plate (501) in the horizontal direction, which is used for the feed pipe (7) to be connected with the corresponding position feed hole for feeding after the feed pipe (7) is rotated.

2. The material cylinder for a stereolithography printer according to claim 1, characterized in that: The outer wall of the feed pipe (7) is connected to a driving mechanism (4) in a transmission manner. The driving mechanism (4) includes a driven gear (402) clamped on the outside of the feed pipe (7). A driving rack (401) is meshed on one side of the driven gear (402). A control cylinder (403) is fixedly mounted on one side of the driving rack (401). The control cylinder (403) is fixedly mounted on the top of a material cover threadedly connected to the top of the material tank body (1) and is used to drive the driven gear (402) and the feed pipe (7) to rotate and control the material discharge connection position through the movement of the driving rack (401).

3. The material cylinder for a stereolithography printer according to claim 2, characterized in that: The driving mechanism (4) further comprises a limiting ring (407) embedded in the top of the feed pipe (7), wherein the inner cavity of the limiting ring (407) is fitted with a plurality of knocking rods (406), and a connecting plate (405) is fixedly connected between the plurality of knocking rods (406) via an axis, and a fixing column (404) is fixedly connected to the bottom of the other side of the connecting plate (405), and the bottom end of the fixing column (404) is fixedly connected to the top of the tank body (1), and a plurality of protrusions are fixedly connected to the inner cavity of the limiting ring (407), which are used to drive the feed pipe (7) to vibrate and cause the liquid to flow through the contact between the knocking rods (406) and the protrusions.

4. The material cylinder for a stereolithography printer according to claim 1, characterized in that: A sealing gasket is provided on the outer wall of the feed pipe (7) close to the outer wall of the dual-pass discharge pipe (13) and at a corresponding position on the side of the discharge pipe (14), and the sealing gasket fits in the inner cavity of the transfer pipe (502).

5. The material cylinder for a stereolithography printer according to claim 4, characterized in that: The outer wall of the material transfer tube (502) is fixedly connected with a plurality of heat dissipation fins, and the outer surfaces of the heat dissipation fins are chamfered.

6. The material cylinder for a stereolithography printer according to claim 1, characterized in that: A melt kettle (6) is fixedly installed in the cavities on both sides of the inner cavity of the material tank body (1), and a discharge protrusion is fixedly connected to the bottom of the melt kettle (6). An electric heating rod for melting the material is fixedly installed in the inner cavity of the melt kettle (6), and a feeding valve port (9) is embedded in the positions corresponding to the melt kettle (6) on both sides of the top of the material tank body (1).

7. The material cylinder for a stereolithography printer according to claim 1, characterized in that: The mixing mechanism (8) includes a mixing seat (801), which is fixedly connected to the bottom of the feed pipe (7), and the bottoms of the double-way discharge pipe (13) and the side discharge pipe (14) extend into the mixing seat (801). The inner cavity of the mixing seat (801) is rotatably connected to a spiral blade (802) through a bearing. A plurality of nozzles are provided around the outer wall of the mixing seat (801) for mixing the discharged material liquid through the spiral blade (802) and then spraying it to the nozzles (803) around the periphery.

8. The material cylinder for a stereolithography printer according to claim 1, characterized in that: The material trough (2) includes an internal chamber for feeding liquid to move and a middle cavity for curing and molding composed of an inner wall, and a liquid feeding slot hole (17) is opened between the internal chamber of the material trough (2) and the middle cavity of the material trough (2), for feeding the curing liquid into the middle cavity area of ​​the material trough (2) and curing it through irradiation on the bottom workbench. The top of the material trough (2) is connected to a pressure ring (10) through a pipe body on all four sides, and the pressure ring (10) is connected to an external pressure device through an air blowing pipe (11).

9. The material cylinder for a stereolithography printer according to claim 8, characterized in that: One side of the material trough (2) is fixedly mounted to one side of a Z-axis moving component of an external light-curing printer via a connecting column (12).

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