High-precision photocuring 3D printing equipment for printing polyurethane elastomer material

Abstract

The invention provides high-precision photocuring 3D printing equipment for printing a polyurethane elastomer material, and belongs to the technical field of 3D printing equipment, the high-precision photocuring 3D printing equipment comprises an upper-layer plate, a printing mechanism, an inclination mechanism and a recoverable execution mechanism are mounted on the upper-layer plate, and a pressing mechanism is mounted on the recoverable execution mechanism; the printing mechanism comprises a container, a deoxidation mold, a photocuring substrate and a forming assembly, the container, the deoxidation mold, the photocuring substrate and the forming assembly are all installed on the upper layer plate, the deoxidation mold is installed on the photocuring substrate and located below the container, and the inclination mechanism comprises a vertical rod, a driving rod and an inclination mechanism body; the recoverable executing mechanism comprises a conveying pipe, a surrounding frame, a material groove, a collecting assembly and a lifting assembly, the material groove is located below the photocuring base plate and connected with the conveying pipe through the collecting assembly, the conveying pipe communicates with the container, and the collecting assembly is connected with the driving rod through the lifting assembly; the pressing mechanism comprises a pressing head and a supporting assembly, and the supporting assembly is installed on the photocuring substrate.

Description

Technical Field

[0001] This application relates to the field of 3D printing equipment technology, specifically to a high-precision photopolymerization 3D printing equipment for printing polyurethane elastomer materials. Background Technology

[0002] As modern manufacturing shifts towards customized, high-precision, and complex structure manufacturing, 3D printing technology, with its unique "additive manufacturing" model, breaks through the limitations of traditional manufacturing processes in forming complex structures. Its applications have expanded from early model making to key areas such as functional component production, medical implant research and development, and aerospace parts manufacturing, becoming a significant force driving technological innovation and product upgrades across various industries. Among these, high-precision 3D printing technology, capable of meeting stringent requirements for product dimensional accuracy and surface quality, has become a crucial development direction in the 3D printing field. Polyurethane elastomers, as high-performance polymer materials, possess outstanding high elasticity, good wear resistance, and strong chemical corrosion resistance. These properties make them widely used in industries such as automotive seals and shock absorbers, medical bionic organs and rehabilitation devices, and the research and development of lightweight elastic components for aerospace, making them an important material choice for manufacturing high-performance elastic components.

[0003] In traditional urethane photopolymer 3D printing equipment, the forming light source moves along with the photopolymer substrate. However, vibration occurs during rotation, causing the forming light source to collide with the substrate and be damaged. Additionally, polyurethane residue in the material tank is difficult to recycle, affecting subsequent processes and wasting polyurethane. Therefore, a high-precision photopolymer 3D printing equipment for printing polyurethane elastomer materials has been invented to address this deficiency. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a high-precision photopolymer 3D printing device for printing polyurethane elastomer materials, including an upper plate, on which a printing mechanism, a tilting mechanism and a recyclable actuator are mounted. A pressing mechanism is mounted on the recyclable actuator. The printing mechanism includes a container, a deoxidizing mold, a photopolymer substrate and a molding component. The container, the deoxidizing mold, the photopolymer substrate and the molding component are all mounted on the upper plate. The deoxidizing mold is mounted on the photopolymer substrate and is located below the container. The tilting mechanism includes a vertical rod, a first connecting rod, and a tilting mechanism. The vertical rod is installed on the lower side of the photocurable substrate, the first connecting rod is connected to the molding assembly and slidably installed on the upper plate, and the tilting assembly is connected to the vertical rod and installed on the upper plate.

[0005] The recyclable actuator includes a delivery pipe, a surrounding frame, a trough, a collection assembly, and a lifting assembly. The trough is located below the photocurable substrate. The trough is connected to the delivery pipe through the collection assembly. The delivery pipe is connected to the container. The collection assembly is connected to the first link through the lifting assembly.

[0006] The pressing mechanism includes a pressing head and a support assembly. The support assembly is mounted on the photocurable substrate, and the pressing head is mounted on the support assembly and located above the photocurable substrate. The pressing head is located on the side of the photocurable substrate away from the collecting assembly.

[0007] Furthermore, multiple support columns are symmetrically fixedly installed on the lower side of the upper plate, and a first electric cylinder is fixedly installed on each support column. The molding component includes a lifting frame, which is slidably installed on the upper plate. The telescopic ends of all the first electric cylinders are fixedly connected to the lifting frame. An upper horizontal plate is fixedly installed on the lifting frame, and a container is fixedly installed on the upper horizontal plate. A first pressure pump is installed on the container and is connected to the container. An installation plate is fixedly installed on the lower side of the upper horizontal plate. Multiple drip heads are fixedly installed in a circular shape on the side of the installation plate away from the upper horizontal plate. All drip heads are connected to the container, and the deoxygenation mold is located below the drip heads.

[0008] Furthermore, an upper rod is fixedly installed on the upper plate, and the photocurable substrate is rotatably connected to the upper rod. The photocurable substrate is made of light-transmitting material, and a lifting plate is installed below the photocurable substrate. Multiple molding light sources are fixedly installed on the side of the lifting plate facing the photocurable substrate, and the first connecting rod is fixedly installed on the lower side of the lifting plate.

[0009] Furthermore, the upper plate is provided with a first mounting groove, and the inner wall of the first mounting groove is provided with a second mounting groove. A second mounting shaft is fixedly installed on the inner wall of the second mounting groove. A slider is slidably installed on the outer surface of the second mounting shaft. The slider is slidably installed on the inner wall of the second mounting groove. A first spring is wound on the outer surface of the second mounting shaft. One end of the first spring is fixedly installed on the outer surface of the second mounting shaft, and the other end of the first spring is fixedly installed on the outer surface of the slider. A positioning shaft is fixedly installed on the side of the slider. The positioning shaft is cylindrical. A limit groove is provided on the side of the upright. The positioning shaft is slidably installed on the inner wall of the limit groove. The lower end face of the upright is semi-circular. A top plate is slidably installed on the lower end face of the upright. The top plate is fixedly installed on the lifting frame on the side away from the first electric cylinder.

[0010] Furthermore, a surrounding frame is fixedly installed on the outer surface of the photocurable substrate. An opening is provided on one side of the surrounding frame, and multiple discharge holes are provided on the side of the surrounding frame with the opening. A collection cover is fixedly installed on the side of the surrounding frame with the discharge holes, and the collection cover surrounds all the discharge holes. The material trough is located below the collection cover, and a connecting block is fixedly installed on the side of the surrounding frame with the discharge holes.

[0011] Furthermore, the collection assembly includes a collection pipe installed on the lower side of the trough. An intermediate box is fixedly installed at the lower end of the collection pipe. A pad is fixedly installed on the lower side of the intermediate box. The pad is fixedly installed between two support columns. A second pressure pump is fixedly installed on the side of the intermediate box. A conveying pipe is fixedly installed on the side of the intermediate box away from the second pressure pump. A filter box is fixedly installed at the end of the conveying pipe away from the intermediate box. The filter box is fixedly installed on the upper horizontal plate. The conveying pipe is connected to the container through the filter box.

[0012] Furthermore, a collection trough is provided on the material trough, and a leakage hole is provided on the inner wall of the collection trough. The collection trough is connected to the material trough through the leakage hole. A lever is slidably installed on the inner wall of the collection trough. A side groove is provided on the side of the material trough away from the first connecting rod. The lever is slidably installed on the inner wall of the side groove. A groove is provided on the side of the lever. A horizontal shaft is fixedly installed in the groove of the lever. A moving block is slidably installed on the outer surface of the horizontal shaft. The moving block is slidably installed on the inner wall of the groove of the lever. A second spring is wound on the outer surface of the horizontal shaft. One end of the second spring is fixedly installed on the outer surface of the horizontal shaft, and the other end of the second spring is fixedly installed on the side of the moving block. A second mounting seat is rotatably installed on the side of the moving block.

[0013] Furthermore, a second connecting shaft is fixedly installed on the side of the connecting block, a third connecting rod is rotatably installed on the outer surface of the second connecting shaft, a first mounting seat is rotatably installed on the side of the third connecting rod, a fourth connecting rod is rotatably installed on the outer surface of the first mounting seat, and the end of the fourth connecting rod away from the first mounting seat is rotatably connected to the second mounting seat.

[0014] Furthermore, the lifting assembly includes a drive rod, which is slidably mounted on the upper plate in a vertical direction. The drive rod is rotatably mounted on the end of the third link away from the second connecting shaft. The end of the drive rod away from the third link is rotatably mounted on a second link, which is slidably mounted on the outer surface of the collecting tube. The end of the second link away from the drive rod is fixedly connected to the first link.

[0015] Furthermore, a fifth mounting groove is provided around the frame. The fifth mounting groove is located on the side of the frame away from the connecting block. The fifth mounting groove penetrates the frame and the photocurable substrate. The support assembly includes a sliding shaft, which is slidably mounted on the inner wall of the fifth mounting groove. A fixing plate is fixedly mounted on the lower end of the sliding shaft. The fixing plate is fixedly mounted on the upper plate. A fifth connecting rod is fixedly mounted on the upper outer surface of the fifth mounting groove. A pressure head is fixedly mounted on the lower side of the fifth connecting rod. The end of the pressure head away from the fifth connecting rod is hemispherical. The side of the fifth connecting rod is tangent to the outer surface of the mounting plate. The pressure head is made of silicone.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: (1) The present invention achieves rapid collection of liquid polyurethane through the collection component, avoiding waste of liquid polyurethane; (2) The present invention uses the process of tilting the photocurable substrate as the power to separate the molding light source from the photocurable substrate, thereby avoiding collision and damage between the molding light source and the photocurable substrate; (3) The present invention achieves pressing of the oxygen-permeable membrane when the photocurable substrate is rotated, thereby avoiding the oxygen-permeable membrane from slipping and affecting the subsequent printing process. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of this application; Figure 2 This is a schematic diagram showing the positional relationship between the tilting mechanism and the printing mechanism provided in an embodiment of this application; Figure 3 Provided for the embodiments of this application Figure 2 A magnified view of part A in the middle; Figure 4 This is a schematic diagram of the tilting mechanism structure provided in the embodiments of this application; Figure 5 This is a schematic diagram of the pad position provided in an embodiment of this application; Figure 6 This is a schematic diagram of the upper plate structure provided in an embodiment of this application; Figure 7 Provided for the embodiments of this application Figure 6 A magnified view of section B in the middle; Figure 8 This is a schematic diagram of the deoxygenation membrane position provided in an embodiment of this application; Figure 9 Provided for the embodiments of this application Figure 8 A magnified view of a portion of point C in the middle.

[0018] Figure 10 This is a schematic diagram of the pole structure provided in an embodiment of this application.

[0019] Figure 11 Provided for the embodiments of this application Figure 10 A magnified view of a portion of point D in the middle.

[0020] Figure 12 This is a schematic diagram showing the location of the discharge hole in an embodiment of this application.

[0021] Figure 13 This is a schematic diagram showing the connection relationship between the filter box and the delivery pipe provided in an embodiment of this application.

[0022] The text labels in the diagram represent: 1-Support mechanism; 2-Printing mechanism; 3-Tilting mechanism; 4-Recyclable actuator; 5-Pressing mechanism; 101-Upper plate; 102-Support column; 103-Pad plate; 104-Upper rod; 201-First pressure pump; 202-Container; 203-Upper horizontal plate; 204-Lifting frame; 205-Mounting plate; 206-Drip head; 207-Deoxidation mold; 208-Photocurable substrate; 209-First electric cylinder; 210-Lifting plate; 211-Forming light source; 212-First mounting shaft; 301-Upright pole; 302-Limiting groove; 303-Reinforcing plate; 304-Top plate; 305-First mounting groove; 306-Second mounting groove; 307-Slider; 308-Positioning shaft; 309-Second mounting shaft; 310-First spring; 311-Driver 312-First connecting rod; 313-Second connecting rod; 314-Transmission shaft; 401-Filter box; 402-Conveying pipe; 403-Third mounting slot; 404-Fourth mounting slot; 405-Surrounding frame; 406-Connecting block; 407-Second connecting shaft; 408-Third connecting rod; 409-Material trough; 410-Side groove; 411-Pulling block; 412-Collection trough; 413-Leakage hole; 414-First mounting seat; 415-Fourth connecting rod; 416-Second mounting seat; 417-Moving block; 418-Horizontal shaft; 419-Second spring; 420-Collection pipe; 421-Second pressure pump; 422-Intermediate box; 423-Discharge hole; 424-Collection cover; 501-Fifth mounting slot; 502-Sliding shaft; 503-Fixing plate; 504-Fifth connecting rod; 505-Pressure head. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] As mentioned in the background section, this application proposes a high-precision photopolymerization 3D printing device for printing polyurethane elastomer materials, as shown in the attached document. Figure 1 To the attached Figure 3 Appendix Figure 5 Appendix Figure 7 To the attached Figure 13As shown, the device includes an upper plate 101, on which a printing mechanism 2, a tilting mechanism 3, and a recyclable actuator 4 are mounted. A pressing mechanism 5 is mounted on the recyclable actuator 4. The printing mechanism 2 includes a container 202, a deoxidizing mold 207, a photocurable substrate 208, and a molding assembly. The container 202, deoxidizing mold 207, photocurable substrate 208, and molding assembly are all mounted on the upper plate 101. The deoxidizing mold 207 is mounted on the photocurable substrate 208 and is located below the container 202. The tilting mechanism 3 includes a vertical rod 301, a first connecting rod 312, and a tilting mechanism. The vertical rod 301 is mounted on the lower side of the photocurable substrate 208, and the first connecting rod 312 is connected to the molding assembly and slidably mounted on it. On the upper plate 101, the tilting component is connected to and installed on the upright 301; the recyclable actuator 4 includes a conveying pipe 402, a surrounding frame 405, a material trough 409, a collection component, and a lifting component. The material trough 409 is located below the photocurable substrate 208. The material trough 409 is connected to the conveying pipe 402 through the collection component. The conveying pipe 402 is connected to the container 202. The collection component is connected to the first connecting rod 312 through the lifting component; the pressing mechanism 5 includes a pressing head 505 and a support component. The support component is installed on the photocurable substrate 208. The pressing head 505 is installed on the support component and located above the deoxidized mold 207. The pressing head 505 is located on the side of the photocurable substrate 208 away from the collection component.

[0026] As attached Figure 1 To the attached Figure 5 As shown, multiple support columns 102 are symmetrically fixedly installed on the lower side of the upper plate 101. Each support column 102 has a first electric cylinder 209 fixedly installed on it. The molding assembly includes a lifting frame 204, which is slidably mounted on the upper plate 101. The telescopic ends of all the first electric cylinders 209 are fixedly connected to the lifting frame 204. An upper horizontal plate 203 is fixedly installed on the lifting frame 204. A container 202 is fixedly installed on the upper horizontal plate 203. A first pressure pump 201 is installed on the container 202 and is connected to it. An installation plate 205 is fixedly installed on the lower side of the upper horizontal plate 203. Multiple drip heads 206 are fixedly mounted in a circular shape on the side of the mounting plate 205 away from the upper horizontal plate 203. All drip heads 206 are connected to the container 202. The deoxidizing membrane 207 is located below the drip heads 206. An upper rod 104 is fixedly mounted on the upper plate 101. A first mounting shaft 212 is fixedly mounted on the side of the photocurable substrate 208. The first mounting shaft 212 is rotatably connected to the upper rod 104. A torsion spring is mounted on the outer surface of the first mounting shaft 212. One end of the torsion spring is fixedly mounted on the outer surface of the first mounting shaft 212, and the other end of the torsion spring is fixedly mounted on the side of the upper rod 104 facing the photocurable substrate 208.

[0027] As attached Figure 2 To the attached Figure 5As shown, the photocurable substrate 208 is made of a light-transmitting material. A contact switch is installed on the lower side of the photocurable substrate 208. A level is installed on the photocurable substrate 208. A lifting plate 210 is installed below the photocurable substrate 208. Multiple molding light sources 211 are fixedly installed on the side of the lifting plate 210 facing the photocurable substrate 208. A first connecting rod 312 is fixedly installed on the lower side of the lifting plate 210. All molding light sources 211 are UV-LED lamps. A logic control circuit is installed on the lifting plate 210. The logic control circuit is electrically connected to all molding light sources 211. The logic control circuit is also electrically connected to the first electric cylinder 209, the level, and the contact switch. The first electric cylinder 209 is electrically connected to the level and the contact switch. The power of the molding light source 211 is 200W / cm², and the wavelength of the light emitted by the molding light source 211 is 405nm.

[0028] As attached Figure 6 To the attached Figure 10 and attached Figure 12 As shown, the upper plate 101 is provided with a first mounting groove 305, and a second mounting groove 306 is provided on the inner wall of the first mounting groove 305. A second mounting shaft 309 is fixedly mounted on the inner wall of the second mounting groove 306. A slider 307 is slidably mounted on the outer surface of the second mounting shaft 309. The slider 307 is slidably mounted on the inner wall of the second mounting groove 306. A first spring 310 is wound around the outer surface of the second mounting shaft 309. One end of the first spring 310 is fixedly mounted on the outer surface of the second mounting shaft 309, and the other end of the first spring 310 is fixedly mounted on the outer surface of the slider 307. A positioning shaft 308 is fixedly mounted on the side of the slider 307. The positioning shaft 308 is cylindrical. A limit groove 302 is provided on the side of the upright 301. The positioning shaft 308 is slidably mounted on the limit groove 302. On the inner wall of the slot 302, the lower end face of the upright 301 is semi-circular, and a top plate 304 is slidably installed on the lower end face of the upright 301. A reinforcing plate 303 is fixedly installed on the lower side of the top plate 304. The reinforcing plate 303 is fixedly installed on the lifting frame 204 on the side away from the material trough 409. A surrounding frame 405 is fixedly installed on the outer surface of the photocurable substrate 208. An opening is provided on one side of the surrounding frame 405. Multiple discharge holes 423 are provided on the side of the surrounding frame 405 with the opening. A collection cover 424 is fixedly installed on the side of the surrounding frame 405 with the discharge holes 423. The collection cover 424 surrounds all the discharge holes 423. The material trough 409 is located below the collection cover 424. A connecting block 406 is fixedly installed on the side of the surrounding frame 405 with the discharge holes 423.

[0029] As attached Figure 7 To the attached Figure 12As shown, the collection assembly includes a collection pipe 420, which is installed on the lower side of the material trough 409. An intermediate box 422 is fixedly installed at the lower end of the collection pipe 420. A pad 103 is fixedly installed on the lower side of the intermediate box 422 and between two support columns 102. A second pressure pump 421 is fixedly installed on the side of the intermediate box 422. A liquid level sensor is installed inside the intermediate box 422 at 2 / 3 of its internal volume and is electrically connected to the second pressure pump 421. A conveying pipe 402 is fixedly installed on the side of the intermediate box 422 away from the second pressure pump 421. A filter box 401 is fixedly installed at the end of the conveying pipe 402 away from the intermediate box 422. A filter screen is installed in the filter box 401 and it is fixedly installed on the upper horizontal plate 203. The conveying pipe 402 is connected to the container 202 through the filter box 401.

[0030] As attached Figure 2 Appendix Figure 4 Appendix Figure 7 To the attached Figure 12 As shown, a collection trough 412 is provided on the material trough 409. A leakage hole 413 is provided on the inner wall of the collection trough 412. The collection trough 412 is connected to the material trough 409 through the leakage hole 413. A lever block 411 is slidably installed on the inner wall of the collection trough 412. A side groove 410 is provided on the side of the material trough 409 away from the first connecting rod 312. The lever block 411 is slidably installed on the inner wall of the side groove 410. A groove is provided on the side of the lever block 411. A horizontal shaft 418 is fixedly installed in the groove of the lever block 411. A moving block 417 is slidably installed on the outer surface of the horizontal shaft 418. The moving block 417 is slidably installed on the inner wall of the groove of the lever block 411. A second spring 419 is wound on the outer surface of the horizontal shaft 418. One end of the second spring 419 is fixedly installed on the outer surface of the horizontal shaft 418. The other end of the second spring 419 is fixedly installed on the side of the moving block 417. A second mounting seat 416 is rotatably installed on the side of the moving block 417.

[0031] As attached Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 7 As shown, a fourth mounting groove 404 is provided on the side of a pole 301, a fourth mounting groove 404 is provided on the side of a support column 102, a third mounting groove 403 is connected to the fourth mounting groove 404, and a delivery pipe 402 is slidably installed on the inner wall of the fourth mounting groove 404 and the third mounting groove 403. The delivery pipe 402 is a flexible hose.

[0032] As attached Figure 6 To the attached Figure 11As shown, a second connecting shaft 407 is fixedly installed on the side of the connecting block 406. A third connecting rod 408 is rotatably installed on the outer surface of the second connecting shaft 407. A first mounting seat 414 is rotatably installed on the side of the third connecting rod 408. A fourth connecting rod 415 is rotatably installed on the outer surface of the first mounting seat 414. The end of the fourth connecting rod 415 away from the first mounting seat 414 is rotatably connected to the second mounting seat 416. The lifting assembly includes a driving rod 311. The driving rod 311 is slidably installed on the upper plate 101 and the sliding direction is vertical. The driving rod 311 is rotatably installed on the end of the third connecting rod 408 away from the second connecting shaft 407. A transmission shaft 314 is fixedly installed on the end of the driving rod 311 away from the third connecting rod 408. A second connecting rod 313 is rotatably installed on the outer surface of the transmission shaft 314. The second connecting rod 313 is slidably installed on the outer surface of the collecting pipe 420. The end of the second connecting rod 313 away from the driving rod 311 is fixedly connected to the first connecting rod 312.

[0033] As attached Figure 5 To the attached Figure 11 As shown, a fifth mounting groove 501 is provided on the surrounding frame 405. The fifth mounting groove 501 is located on the side of the surrounding frame 405 away from the connecting block 406. The fifth mounting groove 501 passes through the surrounding frame 405 and the photocurable substrate 208. The support assembly includes a sliding shaft 502, which is slidably mounted on the inner wall of the fifth mounting groove 501. A fixing plate 503 is fixedly mounted on the lower end of the sliding shaft 502. The fixing plate 503 is fixedly mounted on the upper plate 101. A fifth connecting rod 504 is fixedly mounted on the upper outer surface of the fifth mounting groove 501. A pressure head 505 is fixedly mounted on the lower side of the fifth connecting rod 504. The end of the pressure head 505 away from the fifth connecting rod 504 is hemispherical. The side of the fifth connecting rod 504 is tangent to the outer surface of the mounting plate 205. The pressure head 505 is made of silicone. When the contact switch on the lower side of the photocurable substrate 208 contacts the material tank 409, the pressure head 505 abuts against the deoxidized mold 207.

[0034] The working principle of this invention is as follows: (a) When the work starts, the first pressure pump 201 is started. The first pressure pump 201 drips the liquid polyurethane in container 202 onto the deoxidizing mold 207 through the drip head 206. After five minutes of dripping, the first pressure pump 201 stops working. After the liquid polyurethane has covered the deoxidizing mold 207, the logic control circuit controls the different positions of the molding light source 211 to be started according to the different patterns to be printed. Then, the liquid polyurethane is photocured under the light of the molding light source 211. After the molding light source 211 irradiates the liquid polyurethane for three minutes, the logic control circuit controls all the molding light sources 211 to be turned off. The liquid polyurethane in the corresponding position is photocured under the action of the molding light source 211, while the polyurethane in the other positions is still in liquid state.

[0035] (II) The first electric cylinder 209 is activated, pushing the lifting frame 204 upward and simultaneously moving the dripping head 206 away from the photocurable substrate 208. As the lifting frame 204 rises, it pushes the upright 301 through the top plate 304, thereby causing the photocurable substrate 208 to rotate around the upper rod 104 of the first connecting shaft. During this process, the deoxidizing agent 207 gradually approaches the pressure head 505. When the contact switch on the lower side of the photocurable substrate 208 contacts the material tank 409, the pressure head 505 abuts against the deoxidizing agent 207 to prevent it from sliding. The first electric cylinder 209 stops working. At this time, the polyurethane, still in a liquid state, slides along the upper surface of the photocurable substrate 208. If the liquid polyurethane... When the liquid polyurethane cannot flow out, it is slowly scraped out by a silicone brush. Under the action of the surrounding frame 405, the liquid polyurethane drips down the discharge hole 423 on the surrounding frame 405 onto the material tank 409. It is blocked by the collection cover 424 to prevent the liquid polyurethane from flying out. Then it falls into the intermediate box 422 through the drain hole 413. After all the uncured liquid polyurethane has flowed out of the photocurable substrate 208, the first electric cylinder 209 moves in the opposite direction. Under the action of the torsion spring, the photocurable substrate 208 gradually returns to its original position. When the level on the photocurable substrate 208 detects that the photocurable substrate reinforcing plate 303 is in a horizontal state, the first electric cylinder 209 stops working. Then the above process is repeated continuously to print layer by layer.

[0036] (iii) When the first electric cylinder 209 pushes the lifting frame 204 to rise, the third connecting rod 408 drives the driving rod 311 to fall. The driving rod 311 drives the lifting plate 210 to fall through the second connecting rod 313, thereby driving the molding light source 211 away from the photocurable substrate 208, thus avoiding collision between the photocurable substrate 208 and the molding light source 211 during rotation, and thus avoiding damage to the molding light source 211.

[0037] (iv) As the photocurable substrate 208 gradually returns to its original position, the connecting block 406 drives the third connecting rod 408 to rise, thereby driving the two toggle blocks 411 to move closer to each other through the fourth connecting rod 415, and then pushing the residual liquid polyurethane in the collection tank 412 into the intermediate box 422. When the liquid level sensor detects that the liquid polyurethane in the intermediate box 422 has reached 2 / 3 of the volume of the collection tank 202, the second pressure pump 421 is started. The second pressure pump 421 sends the liquid polyurethane in the intermediate box 422 into the filter box 401 through the delivery pipe 402. The liquid polyurethane is filtered through the filter screen in the filter box 401, and the filtered liquid polyurethane flows back into the container 202.

[0038] (v) During the process of the third link 408 driving the lifting plate 210 to rise and gradually return to its original position, the deoxidizing plate 207 gradually moves away from the pressure head 505.

[0039] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A high precision light-cured 3D printing device for printing polyurethane elastomer material, comprising an upper platen (101), characterized in that, The upper layer plate (101) is provided with a printing mechanism (2), an inclination mechanism (3) and a recyclable execution mechanism (4), the recyclable execution mechanism (4) is provided with a pressing mechanism (5), the printing mechanism (2) comprises a container (202), a deoxidizing brush (207), a light-curing substrate (208) and a forming assembly, the container (202), the deoxidizing brush (207), the light-curing substrate (208) and the forming assembly are all installed on the upper layer plate (101), and the deoxidizing brush (207) is installed on the light-curing substrate (208); The inclination mechanism (3) comprises a vertical rod (301), a first connecting rod (312) and an inclination mechanism, the vertical rod (301) is installed on the lower side of the light-curing substrate (208), the first connecting rod (312) is connected with the forming assembly and is slidingly installed on the upper layer plate (101), and the inclination assembly is connected with the vertical rod (301) and is installed on the upper layer plate (101); The recyclable execution mechanism (4) comprises a conveying pipe (402), a surrounding frame (405), a chute (409), a collecting assembly and a lifting assembly, the chute (409) is connected with the conveying pipe (402) through the collecting assembly, the conveying pipe (402) is communicated with the container (202), and the collecting assembly is connected with the first connecting rod (312) through the lifting assembly; The pressing mechanism (5) comprises a pressure head (505) and a supporting assembly, the supporting assembly is installed on the light-curing substrate (208), and the pressure head (505) is located on the side, away from the collecting assembly, of the light-curing substrate (208).

2. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 1, characterized in that, A plurality of supporting columns (102) are fixedly installed on the lower side of the upper layer plate (101) in a symmetrical manner, one first electric cylinder (209) is fixedly installed on each supporting column (102), the forming assembly comprises a lifting frame (204), the lifting frame (204) is slidingly installed on the upper layer plate (101), the telescopic ends of all the first electric cylinders (209) are fixedly connected with the lifting frame (204), an upper horizontal plate (203) is fixedly installed on the lifting frame (204), the container (202) is fixedly installed on the upper horizontal plate (203), a first pressure pump (201) is installed on the container (202) and communicated with the container (202), a mounting disc (205) is fixedly installed on the lower side of the upper horizontal plate (203), a plurality of dripping heads (206) are fixedly installed on the side, away from the upper horizontal plate (203), of the mounting disc (205) in a circumferential manner, all the dripping heads (206) are communicated with the container (202), and the deoxidizing brush (207) is located below the dripping heads (206).

3. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 2, characterized in that, An upper rod (104) is fixedly installed on the upper layer plate (101), the light-curing substrate (208) is rotationally connected with the upper rod (104), the light-curing substrate (208) is made of a light-transmitting material, a lifting plate (210) is installed below the light-curing substrate (208), a plurality of forming light sources (211) are fixedly installed on the side, facing the light-curing substrate (208), of the lifting plate (210), and the first connecting rod (312) is fixedly installed on the lower side of the lifting plate (210).

4. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 3, characterized in that, The upper layer plate (101) is provided with a first mounting groove (305), a second mounting groove (306) is arranged on the inner wall of the first mounting groove (305), a second mounting shaft (309) is fixedly installed on the inner wall of the second mounting groove (306), a sliding block (307) is slidably installed on the outer surface of the second mounting shaft (309), the sliding block (307) is slidably installed on the inner wall of the second mounting groove (306), a first spring (310) is wound on the outer surface of the second mounting shaft (309), one end of the first spring (310) is fixedly installed on the outer surface of the second mounting shaft (309), the other end of the first spring (310) is fixedly installed on the outer surface of the sliding block (307), a positioning shaft (308) is fixedly installed on the side surface of the sliding block (307), the positioning shaft (308) is cylindrical, a limiting groove (302) is arranged on the side surface of the vertical rod (301), the positioning shaft (308) is slidably installed on the inner wall of the limiting groove (302), the lower end surface of the vertical rod (301) is semicircular, a top plate (304) is slidably installed on the lower end surface of the vertical rod (301), and the top plate (304) is fixedly installed on the lifting frame (204) away from the first electric cylinder (209).

5. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 4, characterized in that, The outer surface of the light curing substrate (208) is fixedly installed with a surrounding frame (405), the surrounding frame (405) is provided with an opening on one side, the surrounding frame (405) is provided with a plurality of discharge holes (423) on the side provided with the opening, the surrounding frame (405) is fixedly installed with a collecting cover (424) on the side provided with the discharge holes (423), the collecting cover (424) surrounds all the discharge holes (423), the chute (409) is located below the collecting cover (424), and the surrounding frame (405) is fixedly installed with a connecting block (406) on the side provided with the discharge holes (423).

6. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 5, characterized in that, The collecting assembly comprises a collecting pipe (420), the collecting pipe (420) is installed on the lower side of the chute (409), an intermediate box (422) is fixedly installed at the lower end of the collecting pipe (420), a backing plate (103) is fixedly installed on the lower side of the intermediate box (422), the backing plate (103) is fixedly installed between the two supporting columns (102), a second pressure pump (421) is fixedly installed on the side surface of the intermediate box (422), a conveying pipe (402) is fixedly installed on the side of the intermediate box (422) away from the second pressure pump (421), a filter box (401) is fixedly installed at one end of the conveying pipe (402) away from the intermediate box (422), the filter box (401) is fixedly installed on the upper cross plate (203), and the conveying pipe (402) is in communication with the container (202) through the filter box (401).

7. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 6, characterized in that, The collecting groove (412) is in communication with the material tank (409) through the leakage hole (413), a push block (411) is slidably installed on the inner wall of the collecting groove (412), the side of the material tank (409) away from the first connecting rod (312) is provided with a side groove (410), the push block (411) is slidably installed on the inner wall of the side groove (410), the side of the push block (411) is provided with a groove, a horizontal shaft (418) is fixedly installed in the groove of the push block (411), a moving block (417) is slidably installed on the outer surface of the horizontal shaft (418), the moving block (417) is slidably installed on the inner wall of the groove of the push block (411), the outer surface of the horizontal shaft (418) is wound with a second spring (419), one end of the second spring (419) is fixedly installed on the outer surface of the horizontal shaft (418), the other end of the second spring (419) is fixedly installed on the side of the moving block (417), and the side of the moving block (417) is rotatably installed with a second mounting seat (416).

8. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 7, characterized in that, The second connecting shaft (407) is rotatably installed on the outer surface of the connecting block (406), the third connecting rod (408) is rotatably installed on the outer surface of the second connecting shaft (407), the first mounting seat (414) is rotatably installed on the side of the third connecting rod (408), the fourth connecting rod (415) is rotatably installed on the outer surface of the first mounting seat (414), and one end of the fourth connecting rod (415) away from the first mounting seat (414) is rotatably connected with the second mounting seat (416).

9. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 8, characterized in that, The lifting assembly comprises a driving rod (311), the driving rod (311) is slidably installed on the upper plate (101) and the sliding direction is vertical, the driving rod (311) is rotatably installed at one end of the third connecting rod (408) away from the second connecting shaft (407), one end of the driving rod (311) away from the third connecting rod (408) is rotatably installed with a second connecting rod (313), the second connecting rod (313) is slidably installed on the outer surface of the collecting pipe (420), and one end of the second connecting rod (313) away from the driving rod (311) is fixedly connected with the first connecting rod (312).

10. A high precision light-cured 3D printing device for printing polyurethane elastomer material according to claim 9, characterized in that, The fifth mounting groove (501) is arranged on the surrounding frame (405), the fifth mounting groove (501) is arranged on the side of the surrounding frame (405) away from the connecting block (406), the fifth mounting groove (501) penetrates the surrounding frame (405) and the photocuring substrate (208), the supporting assembly comprises a sliding shaft (502), the sliding shaft (502) is slidably installed on the inner wall of the fifth mounting groove (501), a fixed plate (503) is fixedly installed at the lower end of the sliding shaft (502), the fixed plate (503) is fixedly installed on the upper plate (101), a fifth connecting rod (504) is fixedly installed on the outer surface of the upper portion of the fifth mounting groove (501), a pressure head (505) is fixedly installed on the lower side of the fifth connecting rod (504), one end of the pressure head (505) away from the fifth connecting rod (504) is hemispherical, the side of the fifth connecting rod (504) is tangent to the outer surface of the mounting disc (205), and the pressure head (505) is made of silica gel.

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