40 results about "3D printing" patented technology

The invention relates to a 3D printing modified polyamino acid material. Raw materials for preparing the 3D printing modified polyamino acid material comprise, by weight, 75-85 parts of polyamino acid, 1-5 parts of a chain extender, 1-5 parts of a crosslinking agent, 0.5-1 part of a nucleating agent, 5-10 parts of a toughening agent, 0.1-0.5 parts of a thermal stabilizer, 1-5 parts of a reinforcing agent and 0.3-0.8 parts of an antioxidant. A low temperature crushing mixing reaction technology is used to modify polyamino acid, so the toughness, the impact strength and the thermal deformation temperature of the modified polyamino acid are greatly improved, thereby the polyamino acid material has a good application prospect in 3D printing.

The invention discloses a three-dimensional printer, a three-dimensional printing method and a preparation method for metal slurry. The printer comprises a support, a printing base plate arranged on the support, an injector arranged on the support and an X-axis stepping motor, a Y-axis stepping motor and a Z-axis stepping motor which are arranged on the support; the injector is used for containing the metal slurry, a spray nozzle is installed at an outlet of the injector, the center line of the spray nozzle perpendicularly intersects with the printing base plate, and the spraying direction of the spray nozzle points to the printing base plate; the X-axis stepping motor, the Y-axis stepping motor and the Z-axis stepping motor control the injector to move in the X-axis direction, the Y-axis direction and the Z-axis direction relative to the printing base plate respectively, an E-axis stepping motor controls a piston of the injector to be pushed in or pulled out of the injector, and any two of an X axis, a Y axis and a Z axis are perpendicular to each other. The printer and the printing method are used for solving the technical problem that in the prior art, a three-dimensional metal printer is high in equipment cost; on the basis that the printing precision is guaranteed, the technical effects of being simple in structure and lowering the cost are achieved.

The invention relates to a high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material. The material is characterized in that a polymer with a mass percentage of 3-30% is stuck and coated on the surface of carbon-based micro-nano powder with a mass percentage of 70-97%, and press molding is carried out, such that the material is obtained. According to the composite material, a layer of polymer is coated on the surface of high-thermal-conductivity high-electrical-conductivity carbon-based micro-nano powder with a water suspension method, such that the high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material powder is prepared. Preparation efficiency is high. When the method provided by the invention is used in preparing the high-thermal-conductivity high-electrical-conductivity carbon nano-grade composite material, the method is simple and feasible. The content of the carbon-based micro-nano powder filling material is high. The method can satisfy actual requirements of large-batch productions. The prepared high-thermal-conductivity carbon nano-grade material has good electrical conductivity and thermal conductivity, and can be applied in 3D printing materials, chemical equipment heat exchangers, laptops, high-power LED lightings, flat panel displays, digital cameras, mobile communication products, and fields of related miniaturized and high speed electronic components.

The invention provides a 3D (three-dimensional) printing extruder, a 3D printer and a manufacturing method of the 3D printing extruder. The 3D printing extruder comprises a wire change part and a printing head, wherein the wire change part is equipped with multiple silk input ends, multiple conveying channels and a silk output end, each silk input end is connected with the silk output end throughone conveying channel, the printing head is provided with an extrusion channel, a feeding port of the extrusion channel is in butted communication with the silk output end, the extrusion channel is provided with a discharging port at the outermost end and is conical, the diameter of the extrusion channel is monotonically decreased from the feeding port to the discharging port, and the diameter ofthe feeding port is equal to that of the silk output end; the conveying channels are arranged in a bending manner, and the conveying channels and the curvature center of the conveying channels are located on the same side of an axis based on the extrusion channel. With the adoption of the special bending setting of the conveying channels and the extrusion channel, the conveying channels and the extrusion channel are free of steps, printing materials are input more smoothly and easily, no obvious bridging is produced, and the condition of blockage is prevented.

The invention belongs to the technical field of 3D printing, and discloses a polypropylene composite material and a preparation method and application thereof. The polypropylene composite material comprises, by weight, 25-70 parts of homopolymer polypropylene, 10-40 parts of copolymerized polypropylene, 5-10 parts of polylactic resin, 10-20 parts of inorganic fillers, 2-5 parts of a compatibilizerand 0.1-5 parts of an auxiliary. According to the polypropylene composite material, a prepared product has the advantages of uniform wire diameter, higher cross section roundness, good processing fluidity, excellent mechanical performance and lower shrinkage rate, the polypropylene composite material can be applied to the fields of 3D printing consumable materials, and the technical defects of easy upward tilting and deformation, nonuniform 3D printing consumable material wire diameter, the failure of being round in cross section and the like in 3D printing process in the prior art are overcome to further promote the development of the polypropylene material in the field of 3D printing materials.

The invention discloses a biological active ceramic bracket with a nano/micron hierarchical pore structure and a preparation method of the biological active ceramic bracket. The preparation method includes the following steps that (1) monodisperse microspheres with the particle size height capable of being controlled are prepared through a soap-free emulsion method; (2) the microspheres are evenlydispersed in ceramic paste, and the ceramic paste with good printability is obtained; (3) the biological active ceramic bracket with the micron order pore size is printed through a 3D printing technology; (4) the printed bracket is sintered, and the biological active ceramic bracket with the nano/micron hierarchical pore structure is obtained. According to the biological active ceramic bracket with the nano/micron hierarchical pore structure and the preparation method of the biological active ceramic bracket, pore-formingtemplates with the particle size capable of being controlled are evenlydispersed in the printing paste, the sintering characteristics of ceramic and the characteristics of precise control of the micropore structure through the 3D printing technology, the biological active ceramic bracket with the nano/micron hierarchical pore structure is successfully and precisely constructed, and the difficult problem that existing 3D printing technologies cannot accurately controlthe nanoscale pore structure is solved.

The invention provides a method for achieving directional solidification based on 3D printing of a multi-layer hollow shell mold. The multi-layer hollow shell mold structure serving as a casting moldis suitable for casting a casting through directional solidification due to the excellent cooling capability, but the multi-layer hollow shell mold structure is complex, manufacturing is difficult through a conventional method, and the accurate multi-layer hollow shell mold structure can be manufactured on the basis of printing of the 3D printing technology. When the casting is cast, after liquidmetal is poured into a cavity of the multi-layer hollow shell mold structure, the bottom of the multi-layer hollow shell mold structure is immersed in cooling water to be cooled, directional solidification is formed, along with ascending of the cooling water liquid level, the hollow layer is gradually filled with the cooling water from bottom to top, the liquid metal solidification interface is gradually upwards pushed in the vertical direction under the situation that the height of the liquid metal solidification interface is larger than the cooling water liquid level height, the same heat preservation conditions of various positions of the casting and stable directional solidification are achieved, accordingly, the defects of mixed crystals, spots and the like are reduced, and the purposes that the casting quality and performance are optimized, and the casting qualification rate is increased are achieved.

The invention discloses a biodegradable 3D printing toughening material and a preparation method, which consists of the following components by weight: polylactic acid (PLA): 70-80 parts; EVA: 30-20 parts; toughening agent: 6-8 parts; compatibilizer: 0.4-5.0 parts; auxiliary agent: 0.2-2.0 parts. The toughening agent is dioctyl phthalate (DOP); the compatibilizer includes maleic anhydride grafted polymer, which is a tertiary polymer formed by copolymerization of methyl methacrylate, butadiene and styrene copolymer. Copolymer; terpolymer (SAG) formed by copolymerization of styrene, acrylonitrile and glycidyl methacrylate. One or two or more compatibilizers are used together. The 3D printing composite material prepared by the invention is non-toxic and environment-friendly, has superior comprehensive performance, and has broad market prospects and application value.

The invention discloses a powder cladding additive manufacturing based method for growing a complex structure on the surface of a cast and forged piece, and belongs to the technical field of metal forming and manufacturing. The method comprises the following steps of: designing a matrix structure part model according to a to-be-manufactured final part and manufacturing the matrix structure part; performing structural design on the surface of the matrix structure part model to obtain a three-dimensional model of the final part; and performing two-dimensional slicing treatment on the three-dimensional model, leading obtained parameters into a 3D printer, and using powder which is the same with the matrix structure part material to perform powder cladding type additive manufacturing on the surface of the matrix structure part through the 3D printer, thereby obtaining the final part. Compared with conventional casting, forging and machining, the method can prevent the cast and forged piecefrom a coarse structure and stress focus, also can avoid a low material utilization rate caused by forged part machining, and does not need to manufacture a dear powder metallurgic mould; and meanwhile, compared with pure 3D printing, the method is higher in production efficiency and is high in product qualification rate.

The present invention provides a three-dimensional printing article for making dental products and the preparation method thereof, which comprises: Ethoxylated bisphenol A dimethacrylate, Diurethane dimethacrylate, Triethylene glycol dimethacrylate, and Diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide. It not only improves the present time-consuming and labor-intensive dental device making, but also can be used in mass production of dental devices.

The invention discloses a device for printing laser crystal cooling heat sinks and a method thereof. The device comprises the components of a worktable, a laser crystal, a clamp, a supporting block, a laser and a powder feeder. The clamp is cylindrical and comprises a first clamp and a second clamp which abut against two ends of the laser crystal. The supporting block is fixedly connected with the worktable and comprises a first supporting block and a second supporting block. The first supporting block abuts against the first clamp. The second supporting block abuts against the second clamp. According to the device and the method of the invention, multiple layers of cooling heat sinks are printed on the surface of the laser crystal through 3D printing technology, thereby realizing close combination between the laser crystal and the cooling heat sinks and remarkably improving heat radiation effect of the cooling heat sinks.

The invention provides a monolithic porous catalytic stirring paddle and a preparation method thereof. The monolithic porous catalytic stirring paddle is formed by adopting a 3D printing technology and comprises a paddle shaft and paddle blades, wherein the surface of each paddle blade is loaded with a catalyst layer; and in a stirring paddle structure model for 3D printing, a skeleton structure of the paddle blades is formed by filling of repeated structure units. The monolithic porous catalytic stirring paddle prepared by the preparation method has the advantages of high structural precision, high mechanical strength and the like, can be used for high-temperature and high-pressure reaction under harsh reaction conditions, and is relatively wide in application field.

The invention belongs to the field of titanium alloy materials, and discloses a titanium alloy for a 3D printing ship. The titanium alloy comprises the following components: 4.0-8.0% of Al, 0.3-2.0% of Mo, 1.0-4.0% of Nb, 0.5-3.0% of Zr, 0.01-0.03% of Y, 0.03-0.12% of O, and the balance of Ti. A preparation method of the titanium alloy comprises the following steps that the materials are preparedaccording to the components of the titanium alloy; the raw materials are smelted and cast into ingots; the cast ingots are machined into rods after cogging and forging; the rods are machined into powder; the powder is screened to obtain titanium alloy powder for the 3D printing ship; and the titanium alloy powder for the 3D printing ship is used as a raw material for preparing a titanium alloy component by a 3D printing technology. The titanium alloy for the 3D printing ship is excellent in strength and toughness matching, is excellent in 3D printing laser forming performance, can be preparedinto a complex titanium alloy component through 3D printing, and is excellent in seawater corrosion resistance and welding performance.

The invention discloses an automatic cleaning device for a 3D printing cold plate runner. The automatic cleaning device comprises a liquid storage tank (4), a water pump (15) and a connecting pipe (5)and further comprises a washing device box body (13), a display and control console (9), an operating pool (10), a vibration exciter (3), a vibration exciter (3) mounting plate (2), a supporting partition plate (12), a display and control instrument (7), buttons (8), a water draining pipe (11), a filter (14), a tee joint (17), damping supporting legs (6), eight electromagnetic valves and four water route joints. When the automatic cleaning device operates, water in the liquid storage tank (4) can pass through the connecting pipe (5) through the water pump (15) and then is pumped into a cold plate (1) to be cleaned according to a specific water route. Along with scouring by water flow, residual powder in the cold plate can be taken out through the water flow. When the water flow passes through the filter (14), the metal residual powder can be filtered out, and the filtered water flows back into the liquid storage tank (4) to complete flowing circulation. The automatic cleaning device for the 3D printing cold plate runner is small in size, convenient to use, high in degree of automation and simple in operation process.

The invention discloses a method for analyzing the mechanical properties of 3D printing samples with different construction orientations, which comprises the following steps of manufacturing a plurality of test sample strips with different construction orientations by adopting 3D printing, and arranging speckles on the surfaces of the test sample strips, placing the test sample strip on a loadingdevice, and debugging the loading device, carrying out a mechanical property detection test, and collecting an image of the test sample strip in the whole test process, performing contrastive analysison the images before and after the deformation of the test sample strip by using a digital image correlation method to obtain pixel point displacement and strain information, according to the straininformation, acquiring a stress-strain curve to obtain performance parameters of the test sample strip, repeating the above steps to complete the mechanical property detection test of the test samplestrips with different construction orientations, and analyzing the difference of the mechanical properties of the test sample strips with different construction orientations.

The invention belongs to the technical field of dental restoration, and particularly relates to a mounting method of a resin try-on crown and an all-ceramic preformed crown thereof. The method specifically comprises the steps: (1) manufacturing a resin try-on crown through a 3D printing technology according to design data of an all-ceramic preformed crown, wherein the size of the resin try-on crown is the same as that of the all-ceramic preformed crown; (2) selecting a proper resin try-on crown for try-on according to teeth and sizes of the teeth, and acquiring a proper model of the resin try-on crown after try-on for multiple times; (3) according to the obtained proper model of the resin try-on crown, selecting an all-ceramic preformed crown with the same model as the resin try-on crown,directly mounting the all-ceramic preformed crown on a deciduous tooth, and performing slight adjustment; and (4) performing cementation at the periphery of the deciduous tooth provided with the all-ceramic preformed crown. The resin try-on crown comprises a crown body and at least two protrusions, and the protrusions are arranged on the surface, except surfaces where the crown body contacts withadjacent teeth. The method has the beneficial effects that the method can improve one-time completion efficiency of the all-ceramic preformed crown, and the all-ceramic preformed crown is convenient to manufacture, low in cost and convenient to use.

The invention discloses a health preservation nursing robot, which comprises a robot body, wherein a display screen is arranged on the robot body; a camera is arranged above the display screen; the display screen is a touchable display screen; symmetrical handles are arranged under the display screen; a medicine emergency box is arranged under the handles; symmetrical human body simulated arm devices are arranged at the two sides of the robot body; a host is arranged below the medicine emergency box; each human body simulated arm device comprises a finger simulator and a sensor; the finger simulator is arranged at the end part of the human body simulated arm device; the sensor is arranged inside the human body simulated arm device; an anti-static layer and a fireproof layer are arranged onthe display screen. The health preservation nursing robot provided by the invention has the advantages that a 3D printing technology is applied to the human body channels and collaterals and acupuncture points, so that the health preservation nursing robot can precisely find each acupuncture point of the human body; when various accidents occur, the emergency measures can be timely used; high speed and convenience are realized; the health preservation nursing robot is suitable for being popularized and used.

The invention discloses a 3D breast printing device, and relates to the technical field of 3D printing. The 3D breast printing device comprises a printing supporting frame and a printer body, the printer body is located at the position, close to the top, of the center inside the printing supporting frame, the 3D breast printing device further comprises two first electric telescopic rods arranged on the lower inner wall of the printing supporting frame, and a printing base is fixedly connected between the output ends of the two first electric telescopic rods. According to the 3D breast printingdevice, a first motor rotates clockwise to drive a telescopic pipe to rotate, so that the telescopic pipe drives a roller wheel and a blade to rotate, when the first motor drives the roller wheel torotate, the roller wheel moves along the track of a limiting groove, the roller wheel gradually pulls the telescopic pipe open, the front and rear outer surfaces and the left outer surface of the blade are sharp, the pulled telescopic pipe gradually enables the blade to penetrate through the bottom of a breast mold to separate a printed breast from the printing base, then the first motor rotates in the reverse direction, the first motor retracts the blade through the limiting groove, and the 3D printing device can enable the printed breast mold to be automatically demolded.

The invention relates to the technical field of biological 3D printing, in particular to a method for facilitating in-vitro maturation of human immature oocytes by utilizing a 3D printing technology. The method comprises the following steps of (1) properly treating naked ova and granular cells of ovary cells; (2) performing in-vitro balanced culture of ovarian granular cells; (3) putting oocytes into the ovarian granular cells, and continuing to perform culture for 2 days; (4) preparing 3D printing ink; (5) preparing 3D printing gel; and (6) printing out follicles by adopting the 3D printing technology, putting the oocytes and an in-vitro maturation culture solution into the follicles, and performing culture for one week. According to the method, the follicles with a biochemical environment similar to that of a human body try to be simulated, and then the oocytes are quickly and accurately put into the follicles for performing artificial culture by depending on the 3D printing technology, so that the in-vitro maturation of the human immature oocytes is realized; the method depends on the 3D printing technology; and the whole process is quick and convenient, and the automation degree is high, so that the technical expense of the in-vitro maturation of the oocytes can be reduced.

The invention belongs to the field of printing, and particularly relates to a 3D printing method. The 3D printing method comprises the following steps that a charcoal stick is prepared; the charcoal stick is positioned in a 3D printer to be processed to form a printing material; a dispersing agent is added to the printing material; the printing material is re-positioned into the 3D printer, and a3D model is unloaded from a website; the 3D printing material is loaded, a printing platform is debugged, printing parameters are set, and the 3D printer starts to work, wherein the 3D printer comprises a printing box, a smashing unit, a feed unit, a stirring unit and a conveying unit, and the printing box is a rectangular box body; the charcoal stick is smashed in the smashing unit, forms charcoal stick debris, and enters the printing box; a pasting agent is added in the printing box; carbon dioxide gas is introduced into the printing box through a gas inlet; the stirring unit fully stirs thepasting agent and the charcoal stick debris; and the pasting agent and the charcoal stick debris form the printing material after full mixing, and are conveyed out of the printing box under action ofthe conveying unit to print white paper.

The invention discloses a visual end feedback control method based on 3D printing, and the visual end feedback control method based on 3D printing includes the following steps that a model is input toa 3D printing robot arm; visual inspection printing model is carried out; compared with an original model of a robot arm, difference is produced and sent to PLC; and finally, the PLC moves the chassis to compensate and feeds back to the robot arm. The invention provides a novel feedback control method and system for 3D printing, and the novel feedback control method for 3D printing can significantly improve the precision of 3D printing. The visual end feedback control method based on 3D printing feeds back to the vision and the robot arm through a method of low disk movement and corrects theprinting position error in real time.

The invention discloses a sheet material polishing device for metal 3D printing, and belongs to the technical field of 3D printing related equipment. The sheet material polishing device for metal 3D printing comprises a frame, a first polishing assembly, a feed port, a discharge port, transmission assemblies, a second polishing assembly, a bottom plate and a top plate. The bottom plate and the topplate are welded fixedly on the bottom end and top end of the frame, respectively. The feed port and the discharge port are disposed at left and right sides of the frame, respectively. The first polishing assembly, the second polishing assembly and the transmission assemblies are all disposed inside the frame. The first polishing assembly is disposed above the second polishing assembly. The transmission assemblies are in two groups and are disposed on two sides of the second polishing assembly, respectively. The transmission assemblies are disposed in parallel with the feed port and the discharge port. The sheet material polishing device for metal 3D printing according to the invention can be applied to the polishing processing of metal sheet material in the technical field of metal 3D printing, can polish two sides of the metal sheet material simultaneously with a good polishing effect, and has a broad application prospect.

The invention belongs to the technical field of 3D printing, and particularly relates to a method for preparing a semiconductor power module heat dissipation water channel through 3D printing. According to the method, a 3D printing mode is utilized, and a corresponding water channel structure is printed in the area of the heat dissipation water channel of the semiconductor power module by using a material which can be removed by a solvent; and after the module injection molding process is completed, the printing material is cleaned and removed with a solvent, and machining and manufacturing of the water channel are achieved. The design and manufacturing process of the radiator of the power module can be simplified, and the cost of the module is further reduced; and meanwhile, a complex water channel can be prepared with high precision.

The invention discloses a movable 3D printing system composed of a 3D printer, a mechanical pan-tilt, spring fixators, a 3D printer mounting platform, a pan-tilt mounting base and a transport carrier.The 3D printer mounting platform is mounted at the top of the mechanical pan-tilt. The 3D printer is placed on the 3D printer mounting platform, and the spring fixators at the four corners of the platform enable the 3D printer to be fixed to the center of the 3D printer mounting platform. The mechanical pan-tilt is connected with a bearing back frame or a warehouse bottom plate of a transport tool through the pan-tilt mounting base. When the transport tool is turned, accelerated, decelerated and rise or fall, an included angle is formed between the normal direction and the gravity direction of the warehouse bottom plate; or when a human body leans forward, bends down and shakes, a dip angle is formed between the normal and the gravity direction of a bottom plate of the bearing back frame.The mechanical pan-tilt conducts motion compensation on the 3D printer mounting platform so that the normal direction and the gravity direction of a 3D printing forming platform are always overlapped, and stable work of the 3D printer in the motion process is maintained.

The invention discloses a high-temperature-resisting knuckle bearing for an actuator and belongs to the technical field of structural design. The knuckle bearing is composed of a rod end shaft sleeve and a shaft core. The shaft core is formed by a mesh-shaped alloy framework and ceramic powder through a high-temperature sintering process. The whole knuckle bearing is formed in a process channel of the shaft core embedding rod end shaft sleeve. The mesh-shaped alloy framework is formed by welding high-temperature alloy wires of different diameters or formed through 3D printing, the ceramic powder is hafnium carbide or zirconium carbide or tantalum carbide, the ceramic powder and the mesh-shaped alloy framework are evenly and densely combined, and the whole shaft core is formed. According to the high-temperature-resisting knuckle bearing for the actuator, the stress strength of the knuckle bearing in work can be guaranteed while thermal transmission in the working state is prevented, and the service life of the knuckle bearing can be prolonged.