Additive manufacturing equipment based on direct writing and digital light processing mixed forming

Abstract

The invention discloses additive manufacturing equipment based on direct writing and digital light processing mixed forming, and belongs to the field of additive manufacturing, the additive manufacturing equipment comprises a substrate, a first printing module and a second printing module, and the first printing module and the second printing module are both installed on the substrate; the first printing module comprises a light machine, a material box, a scraper assembly, a first driving assembly and a lifting assembly, the light machine and the material box are oppositely arranged, the scraper assembly is arranged on the upper surface of the material box, the first driving assembly is connected with the scraper assembly to drive the scraper assembly to move along the upper surface of the material box, and a printing plate used for bearing printing materials is arranged in the material box; the lifting assembly is connected with the printing plate to drive the printing plate to move in the height direction of the material box; and the second printing module comprises a spray head and a second driving assembly, the spray head and the material box are oppositely arranged, the second driving assembly and the spray head are connected to drive the spray head to move above the material box, and therefore the printing speed of the additive manufacturing equipment can be increased, and the application range of the additive manufacturing equipment can be widened.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and in particular relates to an additive manufacturing device based on direct writing and digital light processing hybrid forming. Background Art

[0002] Additive Manufacturing (AM) is a manufacturing technology that integrates computer-aided design, material processing and forming technology, and is based on digital model files. It uses software and CNC systems to stack special metal materials, non-metallic materials and medical biomaterials layer by layer through extrusion, sintering, melting, photocuring, spraying, etc. to produce physical objects.

[0003] Common additive manufacturing equipment includes direct ink writing (DIW) additive equipment, digital light processing (DLP) additive equipment, etc. Direct ink writing additive equipment is a device that uses multiple nozzles or coaxial nozzles to eject various inks and functional materials to achieve additive printing. Digital light processing additive equipment is a device that uses a digital micromirror device to precisely control the light pattern and selectively solidify the entire resin layer at one time to achieve additive printing. Both of the above devices can be used to achieve additive printing of parts, but the direct ink writing additive equipment has a slow printing speed, and the digital light processing additive equipment is only suitable for additive printing of photopolymers, resulting in a limited scope of application of additive manufacturing equipment. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides an additive manufacturing device based on direct writing and digital light processing hybrid forming. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] In a first aspect, the present invention provides an additive manufacturing device based on direct writing and digital light processing hybrid forming, comprising a substrate, a first printing module and a second printing module, wherein the first printing module and the second printing module are both mounted on the substrate;

[0006] The first printing module includes an optical machine, a material box, a scraper assembly, a first driving assembly and a lifting assembly. The optical machine is arranged opposite to the material box. The scraper assembly is arranged on the upper surface of the material box. The first driving assembly is connected to the scraper assembly to drive the scraper assembly to move along the upper surface of the material box. A printing plate for carrying printing materials is arranged in the material box. The lifting assembly is connected to the printing plate to drive the printing plate to move along the height direction of the material box.

[0007] The second printing module includes a nozzle and a second driving assembly. The nozzle and the material box are arranged opposite to each other. The second driving assembly is connected to the nozzle to drive the nozzle to move above the material box.

[0008] In one embodiment of the present invention, the scraper assembly includes a support beam, a scraper and two differential heads, the scraper is connected to the support beam, the support beam is provided with two through holes, the two differential heads extend through the two through holes respectively and both press against the scraper;

[0009] A clamping block is arranged in the through hole, a first clamping groove is arranged on the clamping block, a second clamping groove is arranged on the hole wall of the through hole, and the micrometer head is clamped between the first clamping groove and the second clamping groove.

[0010] In one embodiment of the present invention, the scraper assembly further includes a spring, a fastening bolt and a limit block, a spring slot is further provided on the support beam, a threaded hole is provided on the side wall of the spring slot, the fastening bolt and the threaded hole are threadedly matched, the fastening bolt passes through the threaded hole and extends into the spring slot to fix the first end of the spring in the spring slot, the scraper is provided with a spring hole, and the second end of the spring is fixed in the spring hole;

[0011] The limit block is fixedly connected to the support beam, a limit groove is arranged on the scraper, the limit groove is penetrated along the height direction of the scraper, and the limit block is clamped in the limit groove.

[0012] In one embodiment of the present invention, the first driving assembly includes a screw guide mechanism and a linear guide mechanism, and the screw guide mechanism and the linear guide mechanism are both fixed on the base plate and are arranged in parallel;

[0013] The scraper assembly also includes a first connecting block and a second connecting block;

[0014] A long hole is provided on the base plate, and the length direction of the long hole is parallel to the length direction of the screw guide mechanism. One end of the first connecting block is connected to the screw guide mechanism, and the other end passes through the long hole to be connected to the support beam. One end of the second connecting block is connected to the linear guide mechanism, and the other end passes through the long hole to be connected to the support beam.

[0015] In one embodiment of the present invention, the material box includes a printing material box, a storage box and a stacking box, the printing material box, the storage box and the stacking box are arranged in sequence along the length direction of the substrate, and the printing material box is located between the storage box and the stacking box, three grooves are opened on the substrate, the printing material box, the storage box and the stacking box are respectively arranged in the grooves, and the upper surfaces of the printing material box, the storage box and the stacking box and the upper surface of the substrate are located on the same horizontal plane;

[0016] The material box also includes a first rod, a second rod, a third rod and a fourth rod which are sequentially connected and surround the printing material box, the storage material box and the stacking material box.

[0017] In one embodiment of the present invention, the lifting assembly includes a printing lifting assembly and a material storage lifting assembly, the printing plate includes a first printing plate and a second printing plate, the first printing plate is arranged in the printing material box, and the second printing plate is arranged in the material storage box;

[0018] The printing lifting assembly includes a first support plate, a first lifting slide, a first support block and a first connecting rod. The first lifting slide is arranged along the height direction of the printing material box. The first support plate is fixedly connected to the base plate. The first lifting slide is fixedly connected to the first support plate. The first support block is installed on the first lifting slide. One end of the first connecting rod is connected to the first support block, and the other end is connected to the first printing plate.

[0019] The material storage lifting assembly includes a second support plate, a second lifting slide, a second support block and a second connecting rod. The second lifting slide is arranged along the height direction of the material storage box. The second support plate and the base plate are fixedly connected. The second lifting slide is fixedly connected to the second support plate. The second support block is installed on the second lifting slide. One end of the second connecting rod is connected to the second support block, and the other end is connected to the second printing plate.

[0020] In one embodiment of the present invention, a first U-shaped groove and a second U-shaped groove are provided on the first support block, the first U-shaped groove is arranged to penetrate along the height direction of the printing material box, and the opening direction of the first U-shaped groove is away from the first lifting slide, the second U-shaped groove is arranged to penetrate along the width direction of the printing material box, and the opening direction of the second U-shaped groove is away from the first lifting slide, the printing lifting assembly also includes a first pin shaft, a first pin hole is provided on the first connecting rod, one end of the first connecting rod extends into the first U-shaped groove, and the first pin shaft is inserted into the first pin hole and the second U-shaped groove at the same time;

[0021] A third U-shaped groove and a fourth U-shaped groove are provided on the second supporting block. The third U-shaped groove is arranged to penetrate along the height direction of the material storage box, and the opening direction of the third U-shaped groove is away from the second lifting slide. The fourth U-shaped groove is arranged to penetrate along the width direction of the material storage box, and the opening direction of the fourth U-shaped groove is away from the second lifting slide. The material storage lifting assembly also includes a second pin shaft, a second pin hole is provided on the second connecting rod, one end of the second connecting rod extends into the third U-shaped groove, and the second pin shaft is inserted into the second pin hole and the fourth U-shaped groove at the same time.

[0022] In one embodiment of the present invention, a plurality of annular sealing grooves are provided on the outer periphery of the printing plate, and the plurality of annular sealing grooves are arranged in sequence along the height direction of the material box. The first printing module includes a plurality of sealing rings, and the plurality of sealing rings are respectively installed in the plurality of annular sealing grooves, and the sealing rings are pressed tightly between the inner wall of the material box and the printing plate.

[0023] In one embodiment of the present invention, the first printing module further includes a connecting plate, a cushion block, a mounting plate and a bracket, the bracket is fixedly connected to the base plate, the mounting plate is fixedly connected to the bracket, the connecting plate is fixedly connected to the optical machine, one end of the cushion block is connected to the connecting plate, and the other end is connected to the mounting plate;

[0024] The mounting plate is provided with a plurality of mounting holes distributed in an array, and the pads are connected to different mounting holes to adjust the installation position of the optical machine.

[0025] In one embodiment of the present invention, the second driving assembly includes an X-axis driving mechanism, a Y-axis driving mechanism, a Z-axis driving mechanism, a pad block and a crossbeam, the pad block is mounted on the substrate, the X-axis driving mechanism is mounted on the pad block, the Y-axis driving mechanism is mounted on the X-axis driving mechanism, the Z-axis driving mechanism is mounted on the Y-axis driving mechanism, one end of the crossbeam is connected to the Z-axis driving mechanism, and the other end is connected to the nozzle.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the above scheme of the present application, the additive manufacturing equipment includes a substrate, a first printing module and a second printing module, the first printing module and the second printing module are both installed on the substrate, the first printing module includes an optical machine, a material box, a scraper assembly, a first driving assembly and a lifting assembly, the optical machine and the material box are arranged relative to each other, the scraper assembly is arranged on the upper surface of the material box, the first driving assembly is connected to the scraper assembly to drive the scraper assembly to move along the upper surface of the material box, a printing plate for carrying printing materials is provided in the material box, the lifting assembly is connected to the printing plate to drive the printing plate to move along the height direction of the material box, the second printing module includes a nozzle and a second driving assembly, the nozzle and the material box are arranged relative to each other, and the second driving assembly is connected to the nozzle to drive the nozzle to move above the material box. With this structure, DLP additive printing can be achieved by cooperating with the optical machine, material box, scraper assembly, first drive assembly and lifting assembly in the first printing module, and DIW additive printing can be achieved by cooperating with the nozzle and second drive assembly in the second printing module, so that the above-mentioned additive manufacturing equipment of this application can be compatible with two additive printing methods, thereby improving the printing speed and application scope of the additive manufacturing equipment. Among them, when printing with the additive manufacturing equipment, the first printing module can be used for rapid printing first to improve the printing speed of the parts. When the raw material to be printed is a non-photopolymer, the second printing equipment can be used for printing, so that the additive manufacturing equipment can be applicable to the printing of a variety of materials, thereby improving the application scope of the additive manufacturing equipment. In addition, when the parts are composed of different material layers, the first printing module and the second printing module can be used to print different material layers, thereby further improving the printing speed and application scope of the additive manufacturing equipment.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of an additive manufacturing device provided by an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a scraper assembly in an embodiment of the present invention;

[0031] Figure 3is a schematic diagram of a first drive assembly in an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of a substrate in an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a material box in an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of a lifting assembly in an embodiment of the present invention;

[0035] Figure 7 is a cross-sectional view of the position of the material box in an embodiment of the present invention;

[0036] Figure 8 is a front view of the position of the material box in an embodiment of the present invention;

[0037] Fig. 9 Schematic diagram of the second printing module in an embodiment of the present invention.

[0038] Reference numerals:

[0039] 1-substrate, 2-first printing module;

[0040] 21-optical machine, 22-material box, 221-printing material box, 222-material storage box, 223-material stacking box, 224-first rod, 225-second rod, 226-third rod, 227-fourth rod;

[0041] 23-scraper assembly, 231-support beam, 232-scraper, 233-differential head, 234-clamping block, 235-spring slot, 236-limiting block, 237-first connecting block, 238-second connecting block;

[0042] 24-first driving assembly, 241-screw guide mechanism, 242-linear guide mechanism;

[0043] 25-lifting assembly, 251-printing lifting assembly, 2511-first supporting plate, 2512-first lifting slide, 2513-first supporting block, 2514-first connecting rod, 2515-first printing plate, 252-material storage lifting assembly, 2521-second supporting plate, 2522-second lifting slide, 2523-second supporting block, 2524-second connecting rod, 2525-second printing plate;

[0044] 26-connecting plate, 27-pad, 28-mounting plate, 29-bracket;

[0045] 3-second printing module, 31-nozzle, 32-heightening block, 33-X-axis driving mechanism, 34-Y-axis driving mechanism, 35-Z-axis driving mechanism, 36-crossbeam;

[0046] 4- Sealing ring. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0048] See also Figure 1 and Figure 2 The embodiment of the present invention provides an additive manufacturing device based on direct writing and digital light processing hybrid forming, including a substrate 1, a first printing module 2 and a second printing module 3, both of which are installed on the substrate 1; the first printing module 2 includes an optical machine 21, a material box 22, a scraper assembly 23, a first driving assembly 24 and a lifting assembly 25, the optical machine 21 is arranged opposite to the material box 22, the scraper assembly 23 is arranged on the upper surface of the material box 22, the first driving assembly 24 is connected to the scraper assembly 23 to drive the scraper assembly 23 to move along the upper surface of the material box 22, a printing plate for carrying printing materials is provided in the material box 22, and the lifting assembly 25 is connected to the printing plate to drive the printing plate to move along the height direction of the material box 22; the second printing module 3 includes a nozzle 31 and a second driving assembly, the nozzle 31 and the material box 22 are arranged opposite to each other, and the second driving assembly is connected to the nozzle 31 to drive the nozzle 31 to move above the material box 22.

[0049] In some embodiments of the present application, the optical machine 21 is a projection display device based on digital micromirror technology. When the light source emitted by the optical machine 21 is projected onto the raw materials in the material box 22, the raw materials in the material box 22 can be solidified to achieve printing.

[0050] In some embodiments of the present application, the material box 22 is used to store raw materials, such as liquid resin.

[0051] In some embodiments of the present application, since raw materials such as liquid resin have high viscosity during the additive manufacturing process, it is difficult to keep a layer level in a short time after completion, so it is necessary to flatten and scrape off excess raw materials through the scraper assembly 23. After each light curing process is completed, the scraper 232 sweeps across the surface of the raw material to scrape off excess raw materials, which can ensure that each layer of resin can form a predetermined geometric shape, ensuring the accuracy and quality of the printed product.

[0052] In some embodiments of the present application, the first drive assembly 24 may be a linear drive assembly, such as a screw-nut mechanism, a gear rack mechanism, and the like.

[0053] In some embodiments of the present application, the lifting assembly 25 may be a lifting column, and the driving mechanism of the lifting column may be a screw-nut mechanism or the like.

[0054] In some embodiments of the present application, the printing plate is a supporting platform for the raw materials. During the additive manufacturing process, after each layer of material is solidified, the lifting assembly 25 drives the printing plate to move up and down to realize layer-by-layer printing of the raw materials. The entire three-dimensional model can be formed and printed by layer-by-layer superimposed printing.

[0055] In some embodiments of the present application, the second driving component may be a linear driving mechanism, a two-dimensional driving platform, or a three-dimensional driving platform, and the nozzle 31 is used to store and eject ink and functional materials, such as shape memory polymers, magnetically active soft materials, liquid crystal elastomers, and conductive inks, etc. The nozzle 31 may be one of pressure-driven, volume-driven, and screw-driven.

[0056] In the above scheme of the present application, the additive manufacturing equipment includes a substrate 1, a first printing module 2 and a second printing module 3, the first printing module 2 and the second printing module 3 are both installed on the substrate 1, the first printing module 2 includes an optical machine 21, a material box 22, a scraper assembly 23, a first driving assembly 24 and a lifting assembly 25, the optical machine 21 is arranged opposite to the material box 22, the scraper assembly 23 is arranged on the upper surface of the material box 22, the first driving assembly 24 is connected to the scraper assembly 23 to drive the scraper assembly 23 to move along the upper surface of the material box 22, a printing plate for carrying printing materials is provided in the material box 22, the lifting assembly 25 is connected to the printing plate to drive the printing plate to move along the height direction of the material box 22, the second printing module 3 includes a nozzle 31 and a second driving assembly, the nozzle 31 and the material box 22 are arranged opposite to each other, and the second driving assembly is connected to the nozzle 31 to drive the nozzle 31 to move above the material box 22. With this structure, DLP additive printing can be achieved by cooperating with the optical machine 21, the material box 22, the scraper assembly 23, the first drive assembly 24 and the lifting assembly 25 in the first printing module 2, and DIW additive printing can be achieved by cooperating with the nozzle 31 and the second drive assembly in the second printing module 3, so that the above-mentioned additive manufacturing equipment of this application can be compatible with two additive printing methods, thereby improving the printing speed and application scope of the additive manufacturing equipment. Among them, when printing with the additive manufacturing equipment, the first printing module 2 can be used for rapid printing to improve the printing speed of the parts. When the raw material to be printed is a non-photopolymer, the second printing equipment can be used for printing, so that the additive manufacturing equipment can be applicable to the printing of a variety of materials, thereby improving the application scope of the additive manufacturing equipment. In addition, when the parts are composed of different material layers, the first printing module 2 and the second printing module 3 can be used to print different material layers, further improving the printing speed and application scope of the additive manufacturing equipment.

[0057] In some embodiments of the present application, Figure 2As shown, the scraper assembly 23 includes a support beam 231, a scraper 232 and two differential heads 233. The scraper 232 is connected to the support beam 231. The support beam 231 is provided with two through holes. The two differential heads 233 extend through the two through holes and press against the scraper 232. A clamping block 234 is provided in the through hole. The clamping block 234 is provided with a first clamping groove. The hole wall of the through hole is provided with a second clamping groove. The differential head 233 is clamped between the first clamping groove and the second clamping groove. With this structure, the scraper 232 can be leveled by the two differential heads 233, so that the contact effect between the scraper 232 and the upper surface of the material box 22 is better, thereby improving the scraping effect of the scraper assembly 23, and further improving the forming accuracy of the parts. By clamping the differential head 233 with the clamping block 234 and the hole wall of the through hole, it can be more convenient to install and fix the differential head 233 and improve the stability of the differential head 233.

[0058] In some embodiments of the present application, the scraper 232 is a rectangular blade body, and the support beam 231 includes a bottom plate and two side plates. The bottom plate is arranged along the width direction of the substrate 1, and the two side plates are respectively connected to the two ends of the bottom plate. The bottom plate and the two side plates form a groove body with an opening facing the substrate 1. The scraper 232 is arranged in the groove body and connected to the bottom plate, and two perforations are both arranged on the bottom plate.

[0059] In some embodiments of the present application, both the first clamping groove and the second clamping groove are arc-shaped grooves, which are convenient for fitting with the cylindrical surface of the micrometer head 233 , thereby improving the stability of the installation and fixation of the micrometer head 233 .

[0060] In some embodiments of the present application, the micrometer head 233 is a precision adjustment structure, such as a micrometer screw, which can improve the leveling accuracy of the scraper 232 by achieving micro-distance feeding through spiral screwing.

[0061] In some embodiments of the present application, the scraper assembly 23 further includes a spring, a fastening bolt and a limit block 236. The support beam 231 is further provided with a spring slot 235. A threaded hole is provided on the side wall of the spring slot 235. The fastening bolt and the threaded hole are threadedly matched. The fastening bolt passes through the threaded hole and extends into the spring slot 235 to fix the first end of the spring in the spring slot 235. The scraper 232 is provided with a spring hole, and the second end of the spring is fixed in the spring hole. The limit block 236 is fixedly connected to the support beam 231. The scraper 232 is provided with a limit slot, which is set along the height direction of the scraper 232. The limit block 236 is clamped in the limit slot. With this structure, the scraper 232 and the support beam 231 can be connected by a spring. At the same time, the spring can apply an upward pulling force to the scraper 232 to balance the pressure applied by the differential head 233 to the scraper 232. In addition, by the cooperation between the limiting block 236 and the limiting groove, the freedom of the scraper 232 can be limited, so that the scraper 232 can only move and level along the vertical direction, thereby improving the stability of the scraper 232.

[0062] In some embodiments of the present application, two groups of springs, fastening bolts, threaded holes and spring slots 235 are provided. By cooperating with the two groups of springs, fastening bolts, threaded holes and spring slots 235, the stability of the scraper 232 can be further improved.

[0063] In some embodiments of the present application, two groups of the limiting blocks 236 and the limiting grooves are provided. Through the cooperation of the two groups of limiting blocks 236 and the limiting grooves, the stability of the scraper 232 can be further improved.

[0064] In some embodiments of the present application, Figure 3 and Figure 4As shown, the first driving assembly 24 includes a screw guide mechanism 241 and a linear guide mechanism 242, both of which are fixed on the base plate 1 and are arranged in parallel; the scraper assembly 23 also includes a first connecting block 237 and a second connecting block 238; a long hole is provided on the base plate 1, and the length direction of the long hole is parallel to the length direction of the screw guide mechanism 241, one end of the first connecting block 237 is connected to the screw guide mechanism 241, and the other end passes through the long hole and is connected to the support beam 231, and one end of the second connecting block 238 is connected to the linear guide mechanism 242, and the other end passes through the long hole and is connected to the support beam 231. With this structure, the first connecting block 237 can be driven to move linearly along the length direction of the long hole through the screw guide mechanism 241, and the first connecting block 237 drives the support beam 231 to move linearly along the length direction of the long hole when the first connecting block 237 moves, thereby driving the scraper 232 to move linearly along the length direction of the long hole to flatten and scrape off excess raw materials. When the support beam 231 moves, since the second connecting block 238 is connected to the linear guide mechanism 242, the second connecting block 238 can make a linear motion along the length direction of the linear guide mechanism 242, and the scraper assembly 23 is driven to move through the screw guide mechanism 241 and the linear guide mechanism 242, which can enable the scraper assembly 23 to move to flatten and scrape away excess raw materials while improving the stability of the scraper assembly 23.

[0065] In some embodiments of the present application, the screw guide mechanism 241 may be a ball screw mechanism or a screw slider mechanism. The screw guide mechanism 241 may include three support blocks, all of which are connected to the slider of the screw guide mechanism 241. The first connection block 237 of the scraper assembly 23 is fixedly connected to the three support blocks at the same time to improve the stability of the connection of the first connection block 237.

[0066] In some embodiments of the present application, the linear guide mechanism 242 may include a guide rail and a slider. Three sliders may be provided, and the three sliders are arranged in sequence along the length direction of the guide rail. The second connecting block 238 of the scraper assembly 23 is fixedly connected to the three sliders at the same time to improve the stability of the connection of the second connecting block 238.

[0067] In some embodiments of the present application, Figure 4 and Figure 5As shown, the material box 22 includes a printing material box 221, a storage box 222 and a stacking box 223. The printing material box 221, the storage box 222 and the stacking box 223 are arranged in sequence along the length direction of the substrate 1, and the printing material box 221 is located between the storage box 222 and the stacking box 223. Three grooves are opened on the substrate 1, and the printing material box 221, the storage box 222 and the stacking box 223 are respectively arranged in the grooves, and the upper surfaces of the printing material box 221, the storage box 222 and the stacking box 223 and the upper surface of the substrate 1 are located on the same horizontal plane; the material box 22 also includes a first rod 224, a second rod 225, a third rod 226 and a fourth rod 227 which are connected and surround the printing material box 221, the storage box 222 and the stacking box 223 in sequence. With this structure, the printing material box 221 is used to store printing raw materials such as liquid resin, and the optical machine 21 can be arranged relative to the printing material box 221 to realize part forming by solidifying the raw materials in the printing material box 221. The storage box 222 is used to store unused printing raw materials for subsequent use. The stacking box 223 is used to temporarily store objects that have been printed or to be processed for subsequent operations to ensure that the objects will not be damaged during the storage process. When the upper surfaces of the printing material box 221, the storage box 222 and the stacking box 223 are located on the same horizontal plane as the upper surface of the substrate 1, the printing error can be reduced and the printing accuracy can be improved. The first rod 224, the second rod 225, the third rod 226 and the fourth rod 227 can be used to enclose and protect the printing material box 221, the storage box 222 and the stacking box 223, and at the same time, the liquid material in the material box 22 can be prevented from overflowing from the substrate 1.

[0068] In some embodiments of the present application, the bottoms of the printing material box 221 , the material storage box 222 , and the material stacking box 223 are all provided with circular through holes and exhaust holes.

[0069] In some embodiments of the present application, the long hole is located outside the area surrounded by the first rod 224, the second rod 225, the third rod 226 and the fourth rod 227. In this way, the liquid material in the material box 22 is prevented from overflowing from the long hole.

[0070] In some embodiments of the present application, Figure 6As shown, the lifting assembly 25 includes a printing lifting assembly 251 and a material storage lifting assembly 252, the printing plate includes a first printing plate 2515 and a second printing plate 2525, the first printing plate 2515 is arranged in the printing material box 221, and the second printing plate 2525 is arranged in the material storage box 222; the printing lifting assembly 251 includes a first support plate 2511, a first lifting slide 2512, a first support block 2513 and a first connecting rod 2514, the first lifting slide 2512 is arranged along the height direction of the printing material box 221, the first support plate 2511 is fixedly connected to the substrate 1, the first lifting slide 2512 is fixedly connected to the first support plate 2511, and the first support block 2513 is installed on the first lifting slide 2512. On the slide 2512, one end of the first connecting rod 2514 is connected to the first support block 2513, and the other end is connected to the first printing plate 2515; the material storage lifting assembly 252 includes a second support plate 2521, a second lifting slide 2522, a second support block 2523 and a second connecting rod 2524, the second lifting slide 2522 is arranged along the height direction of the material storage box 222, the second support plate 2521 is fixedly connected to the base plate 1, the second lifting slide 2522 is fixedly connected to the second support plate 2521, the second support block 2523 is installed on the second lifting slide 2522, one end of the second connecting rod 2524 is connected to the second support block 2523, and the other end is connected to the second printing plate 2525. With this structure, the first printing plate 2515 is driven to move up and down in the printing material box 221 through the printing lifting assembly 251, so that the first printing plate 2515 can drive the raw materials in the printing material box 221 to move to realize layer-by-layer superimposed printing, thereby realizing the printing and forming of parts. The second printing plate 2525 is driven to move up and down in the material storage box 222 through the material storage lifting assembly 252, so that when the raw materials in the material storage box 222 are used for printing, the second printing plate 2525 can drive the raw materials in the material storage box 222 to move to achieve layer-by-layer printing, thereby realizing the printing of parts.

[0071] In some embodiments of the present application, the first lifting slide 2512 and the second lifting slide 2522 both include a motor and a screw nut structure. The screw nut structure is arranged along the height direction of the material box 22. When the motor drives the screw nut structure to move linearly, it can drive the first printing plate 2515 or the second printing plate 2525 to move up and down.

[0072] In some embodiments of the present application, Figure 6As shown, the first support block 2513 is provided with a first U-shaped groove and a second U-shaped groove, the first U-shaped groove is arranged to penetrate along the height direction of the printing material box 221, and the opening direction of the first U-shaped groove is away from the first lifting slide 2512, the second U-shaped groove is arranged to penetrate along the width direction of the printing material box 221, and the opening direction of the second U-shaped groove is away from the first lifting slide 2512, the printing lifting assembly 251 also includes a first pin shaft, a first pin hole is arranged on the first connecting rod 2514, one end of the first connecting rod 2514 extends into the first U-shaped groove, and the first pin shaft is inserted into the first pin hole and the second U-shaped groove at the same time. Groove; a third U-shaped groove and a fourth U-shaped groove are provided on the second support block 2523, the third U-shaped groove is arranged to penetrate along the height direction of the storage box 222, and the opening direction of the third U-shaped groove is away from the second lifting slide 2522, the fourth U-shaped groove is arranged to penetrate along the width direction of the storage box 222, and the opening direction of the fourth U-shaped groove is away from the second lifting slide 2522, the storage lifting assembly 252 also includes a second pin shaft, a second pin hole is provided on the second connecting rod 2524, one end of the second connecting rod 2524 extends into the third U-shaped groove, and the second pin shaft is inserted into the second pin hole and the fourth U-shaped groove at the same time. With this structure, the first connecting rod 2514 can be connected to the first support block 2513 and installed more conveniently through the cooperation of the first U-shaped groove, the second U-shaped groove, the first pin shaft and the first pin hole, and the second connecting rod 2524 can be connected to the second support block 2523 and installed more conveniently through the cooperation of the third U-shaped groove, the fourth U-shaped groove, the second pin shaft and the second hole. In addition, the cooperation of the first pin shaft and the first pin hole can not only limit the degree of freedom of the first connecting rod 2514, but also prevent the first connecting rod 2514 from getting stuck when performing lifting and reciprocating motion; the cooperation of the second pin shaft and the second pin hole can not only limit the degree of freedom of the second connecting rod 2524, but also prevent the second connecting rod 2524 from getting stuck when performing lifting and reciprocating motion.

[0073] In some embodiments of the present application, Figure 7 and Figure 8 As shown, the outer periphery of the printing plate is provided with a plurality of annular sealing grooves, which are sequentially arranged along the height direction of the material box 22. The first printing module 2 includes a plurality of sealing rings 4, which are respectively installed in the plurality of annular sealing grooves, and the sealing rings 4 are pressed tightly between the inner wall of the material box 22 and the printing plate. With this structure, the sealing effect between the printing plate and the inner wall of the material box 22 can be enhanced by the plurality of sealing rings 4, so as to prevent the liquid material in the material box 22 from flowing out from the gap between the printing plate and the inner wall of the material box 22.

[0074] In some embodiments of the present application, two annular sealing grooves are provided, two sealing rings 4 are provided, and the two sealing rings 4 are respectively nested in the two annular sealing grooves.

[0075] In some embodiments of the present application, the diameters of the plurality of sealing rings 4 may be different.

[0076] In some embodiments of the present application, a circular boss is provided on the lower surface of the printing plate, and one end of the first connecting rod 2514 or the second connecting rod 2524 of the lifting assembly 25 can be fixed in the circular boss. Three threaded holes are provided on the outer circumference of the circular boss, and the axes of the threaded holes are perpendicular to the axes of the threaded holes. The screws and the threaded holes are threadedly matched to fix the first connecting rod 2514 or the second connecting rod 2524 in the circular boss. A flange linear bearing is installed at the bottom of the material box 22, and the first connecting rod 2514 or the second connecting rod 2524 is inserted into the flange linear bearing.

[0077] In some embodiments of the present application, Figure 1 As shown, the first printing module 2 also includes a connecting plate 26, a cushion block 27, a mounting plate 28 and a bracket 29. The bracket 29 is fixedly connected to the substrate 1, the mounting plate 28 is fixedly connected to the bracket 29, the connecting plate 26 is fixedly connected to the optical machine 21, one end of the cushion block 27 is connected to the connecting plate 26, and the other end is connected to the mounting plate 28; the mounting plate 28 is provided with a plurality of mounting holes distributed in an array, and the cushion block 27 is connected to different mounting holes to adjust the installation position of the optical machine 21. With this structure, the optical machine 21 can be fixed at a preset position by the connecting plate 26, the cushion block 27, the mounting plate 28 and the bracket 29, and the installation position of the optical machine 21 can be adjusted by adjusting the cushion block 27 to connect to different mounting holes on the mounting plate 28, and the installation position of the optical machine 21 can be adjusted by adjusting the thickness of the cushion block 27, so that the projection format of the optical machine 21 can match the printing plane.

[0078] In some embodiments of the present application, the bracket 29 can be a rib plate arranged in the vertical direction, and the center of the rib plate is hollowed out to reduce the weight of the rib plate. Two rib plates can be provided, and the two rib plates are respectively connected to the two sides of the mounting plate 28.

[0079] In some embodiments of the present application, Figure 1 and Fig. 9As shown, the second driving assembly includes an X-axis driving mechanism 33, a Y-axis driving mechanism 34, a Z-axis driving mechanism 35, a padding block 32 and a crossbeam 36. The padding block 32 is mounted on the substrate 1, the X-axis driving mechanism 33 is mounted on the padding block 32, the Y-axis driving mechanism 34 is mounted on the X-axis driving mechanism 33, the Z-axis driving mechanism 35 is mounted on the Y-axis driving mechanism 34, one end of the crossbeam 36 is connected to the Z-axis driving mechanism 35, and the other end is connected to the nozzle 31. With this structure, the nozzle 31 can be driven to move along the length direction of the substrate 1 through the X-axis driving mechanism 33, the nozzle 31 can be driven to move along the width direction of the substrate 1 through the Y-axis driving mechanism 34, and the nozzle 31 can be driven to move along the height direction of the substrate 1 through the Z-axis driving mechanism 35, so that the nozzle 31 can achieve three degrees of freedom of movement, which is convenient for the nozzle 31 to move to the set position for printing.

[0080] In some embodiments of the present application, the spray head 31 may be a screw valve structure.

[0081] In some embodiments of the present application, the X-axis driving mechanism 33, the Y-axis driving mechanism 34 and the Z-axis driving mechanism 35 are all synchronous belt modules composed of a synchronous belt, a tensioner, a guide wheel and the like.

[0082] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0083] In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the feature. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An additive manufacturing device based on direct writing and digital light processing hybrid forming, characterized in that: It comprises a substrate, a first printing module and a second printing module, wherein the first printing module and the second printing module are both installed on the substrate; The first printing module includes an optical machine, a material box, a scraper assembly, a first driving assembly and a lifting assembly, wherein the optical machine is arranged opposite to the material box, the scraper assembly is arranged on the upper surface of the material box, the first driving assembly is connected to the scraper assembly to drive the scraper assembly to move along the upper surface of the material box, a printing plate for carrying printing materials is arranged in the material box, and the lifting assembly is connected to the printing plate to drive the printing plate to move along the height direction of the material box; The second printing module includes a nozzle and a second driving assembly. The nozzle and the material box are arranged opposite to each other. The second driving assembly is connected to the nozzle to drive the nozzle to move above the material box.

2. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 1 is characterized in that: The scraper assembly includes a support beam, a scraper and two differential heads, wherein the scraper is connected to the support beam, and the support beam is provided with two through holes, and the two differential heads extend through the two through holes respectively and press against the scraper; A clamping block is arranged in the through hole, a first clamping groove is arranged on the clamping block, a second clamping groove is arranged on the hole wall of the through hole, and the micrometer head is clamped between the first clamping groove and the second clamping groove.

3. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 2 is characterized in that: The scraper assembly also includes a spring, a fastening bolt and a limit block. The support beam is also provided with a spring groove, a threaded hole is opened on the side wall of the spring groove, the fastening bolt and the threaded hole are threadedly matched, and the fastening bolt passes through the threaded hole and extends into the spring groove to fix the first end of the spring in the spring groove. The scraper is provided with a spring hole, and the second end of the spring is fixed in the spring hole. The limiting block is fixedly connected to the support beam, the scraper is provided with a limiting groove, the limiting groove is arranged through along the height direction of the scraper, and the limiting block is clamped in the limiting groove.

4. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 2, characterized in that: The first driving assembly includes a screw guide rail mechanism and a linear guide rail mechanism, and the screw guide rail mechanism and the linear guide rail mechanism are both fixed on the base plate and are arranged in parallel; The scraper assembly also includes a first connecting block and a second connecting block; A long hole is provided on the base plate, and the length direction of the long hole is parallel to the length direction of the screw guide rail mechanism. One end of the first connecting block is connected to the screw guide rail mechanism, and the other end passes through the long hole and is connected to the support beam. One end of the second connecting block is connected to the linear guide rail mechanism, and the other end passes through the long hole and is connected to the support beam.

5. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 1 is characterized in that: The material box comprises a printing material box, a storage box and a stacking box, the printing material box, the storage box and the stacking box are arranged in sequence along the length direction of the substrate, and the printing material box is located between the storage box and the stacking box, three grooves are opened on the substrate, the printing material box, the storage box and the stacking box are respectively arranged in the grooves, and the upper surfaces of the printing material box, the storage box and the stacking box and the upper surface of the substrate are located on the same horizontal plane; The material box also includes a first rod, a second rod, a third rod and a fourth rod which are sequentially connected and surround the printing material box, the storage material box and the stacking material box.

6. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 5 is characterized in that: The lifting assembly includes a printing lifting assembly and a material storage lifting assembly, the printing plate includes a first printing plate and a second printing plate, the first printing plate is arranged in the printing material box, and the second printing plate is arranged in the material storage box; The printing lifting assembly includes a first support plate, a first lifting slide, a first support block and a first connecting rod, the first lifting slide is arranged along the height direction of the printing material box, the first support plate is fixedly connected to the base plate, the first lifting slide is fixedly connected to the first support plate, the first support block is installed on the first lifting slide, one end of the first connecting rod is connected to the first support block, and the other end is connected to the first printing plate; The material storage lifting assembly includes a second support plate, a second lifting slide, a second support block and a second connecting rod. The second lifting slide is arranged along the height direction of the material storage box. The second support plate is fixedly connected to the base plate. The second lifting slide is fixedly connected to the second support plate. The second support block is installed on the second lifting slide. One end of the second connecting rod is connected to the second support block, and the other end is connected to the second printing plate.

7. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 6, characterized in that: The first support block is provided with a first U-shaped groove and a second U-shaped groove, the first U-shaped groove is arranged to penetrate along the height direction of the printing material box, and the opening direction of the first U-shaped groove is away from the first lifting slide, the second U-shaped groove is arranged to penetrate along the width direction of the printing material box, and the opening direction of the second U-shaped groove is away from the first lifting slide, the printing lifting assembly also includes a first pin shaft, a first pin hole is arranged on the first connecting rod, one end of the first connecting rod extends into the first U-shaped groove, and the first pin shaft is inserted into the first pin hole and the second U-shaped groove at the same time; The second supporting block is provided with a third U-shaped groove and a fourth U-shaped groove, the third U-shaped groove is arranged to penetrate along the height direction of the storage box, and the opening direction of the third U-shaped groove is away from the second lifting slide, the fourth U-shaped groove is arranged to penetrate along the width direction of the storage box, and the opening direction of the fourth U-shaped groove is away from the second lifting slide, the material storage lifting assembly also includes a second pin shaft, a second pin hole is arranged on the second connecting rod, one end of the second connecting rod extends into the third U-shaped groove, and the second pin shaft is inserted into the second pin hole and the fourth U-shaped groove at the same time.

8. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 1 or 6, characterized in that: A plurality of annular sealing grooves are provided on the outer periphery of the printing plate, and the plurality of annular sealing grooves are arranged in sequence along the height direction of the material box. The first printing module includes a plurality of sealing rings, and the plurality of sealing rings are respectively installed in the plurality of annular sealing grooves, and the sealing rings are pressed tightly between the inner wall of the material box and the printing plate.

9. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 1, characterized in that: The first printing module further includes a connecting plate, a cushion block, a mounting plate and a bracket, wherein the bracket is fixedly connected to the base plate, the mounting plate is fixedly connected to the bracket, the connecting plate is fixedly connected to the optical machine, one end of the cushion block is connected to the connecting plate, and the other end is connected to the mounting plate; The mounting plate is provided with a plurality of mounting holes distributed in an array, and the pad is connected to different mounting holes to adjust the mounting position of the optical machine.

10. The additive manufacturing device based on direct writing and digital light processing hybrid forming according to claim 1, characterized in that: The second driving assembly includes an X-axis driving mechanism, a Y-axis driving mechanism, a Z-axis driving mechanism, a pad block and a crossbeam, the pad block is installed on the substrate, the X-axis driving mechanism is installed on the pad block, the Y-axis driving mechanism is installed on the X-axis driving mechanism, the Z-axis driving mechanism is installed on the Y-axis driving mechanism, one end of the crossbeam is connected to the Z-axis driving mechanism, and the other end is connected to the nozzle.

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