117results about "Additive manufacturing apparatus" patented technology

The invention provides a flame trap cartridge 154 for use in a flame arrestor 50, the flame trap cartridge comprising a casing 160, and a foam component 170 having two opposite ends and at least one side edge, wherein the foam component is at least partially encased around at least one side edge by the casing. The invention also provides a flame arrestor, a method of preventing flame propagation into a fuel tanks and a method of operating an aircraft.

A method of manufacturing an article with integral active electronic component comprising: using an additive manufacturing process to: a) form a non-electrically conductive substrate; b) form a non-electrically conductive perforated layer having an aperture; c) form electrically conductive anode and cathode elements spaced in the aperture; d) deposit a conductive electrical connection to each of the elements suitable for imparting an electrical potential difference between the elements; e) form a non-electrically conductive sealing layer atop the perforated layer so as to retain and seal the aperture in the perforated layer.

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.

Since concrete materials do not cure quick enough when prototyping methods are used, so that a lower layer (2a) is already completely cured when the next layer (2b) is applied, a support material (4) is applied about the formed element (100) that is being built up in order to compensate for the lack of pressure resistance of the lower layer (2a), wherein the support material preferably has the same specific weight as the material (3) of the formed element (100). Thus, 3D-printing as well as selective curing are facilitated as build up methods.

The invention belongs to the field of additive manufacturing, and relates to a multi-knife automatic knife changing type powder laying scraper knife device of a 3D printer. The device is arranged above a sinter molding face or a curing molding face and can do reciprocating motion along guide rails, and scraper knife blades are used for striking off powder and completing the powder laying procedure. The device is characterized in that the scraper knife blades are arranged, the scraper knife blade at the lowest position serves as a work knife blade, the rest of knife blades serve as spare knife blades, the spare knife blades can be automatically exchanged to the lower work positions under control of a control system, and therefore normal running of a machine is guaranteed; shutdown is not needed when a knife holder shaft turns, and therefore the production cost of the 3D printer is reduced, and time is saved.

A heat-absorbing structural material has a sealed outside shell or container, and an internal structure in the interior space enclosed by the container. In addition the structural material has a phase-change material in the interior space, interspersed between elements of the internal structure. The internal structure provides increased strength to the structural material, allowing it to better withstand external forces placed on it. The phase change material may change from a solid to a liquid during operation of the structural material as a heat absorber, such as a heat sink. The internal structure may be made as an integral part of the structural material, formed with at least part of the container by a three-dimensional printing process, or by casting. The phase change material, such as a suitable wax, may improve heat-absorbing performance of the structural material by changing phase during heating.

A method for fabricating a part includes sectionalizing a computer-generated representation of a part into strata having an order, forming layers corresponding to the strata from sheet material, stacking at least two of the layers in the order, and joining the layers together. The method is suitable for producing a phase-change material container for a thermal energy harvesting device, for example.

The invention provides a laser wire fusing additive manufacturing titanium alloy component structure refining and isometric crystal converting method. The laser wire fusing additive manufacturing titanium alloy component structure refining and isometric crystal converting method specifically comprises the following steps that an ultrasonic impact micro forging device and a laser wire fusing additive manufacturing device are coupled, and a composite manner that the laser wire fusing additive manufacturing device is arranged in front and the ultrasonic impact micro forging device is arranged onthe back is adopted for synchronous composite manufacturing; according to the workpiece shape, the path is reasonably planned, related parameters of the ultrasonic impact micro forging device and thelaser wire fusing additive manufacturing device are set, effective compatibility is achieved, and the composite manufacturing process is controlled; and according to path planning and system parameters, layer-by-layer ultrasonic impact micro forging treatment is synchronously conducted in the laser wire fusing process till the titanium alloy component additive manufacturing process is finished. The provided method is used for but not limited to the laser wire fusing deposition additive manufacturing technology and can be widely applied to arc wire fusing, plasma arc wire fusing, electronic beam wire fusing and other additive manufacturing technologies.

Methods are provided for generating intraluminal prosthetic implants designed to fit onto specific anatomical locations within regions which are stable in terms of their motion in time.

The invention discloses a metal sample 3D printing forming method with a defect presetting process. The 3D printing forming method comprises the following steps that 1, according to the actual size and shape of a required metal sample, a three-dimensional modeling software is adopted for data model designing; 2, different types of defects of a certain number, size and distribution are designed, and modifying is carried out in a three-dimensional model; 3, the slicing treatment is carried out on the designed model, contour data of each layer are obtained, and a forming path is planned; and 4, proper 3D printing metal powder is selected according to the material of the metal sample, and an SLM 3D printer with appropriate forming size is selected for printing and forming. According to the method, the 3D printing forming method is introduced into the preparation of the metal sample internally provided with the defects for the first time, the existing sample preparation difficulty is greatly simplified, and the sample preparation precision is improved; and a selective laser melting (SLM) 3D printing device is used so that the metal samples with various complex shapes can be prepared.

The invention discloses a static shaft shoulder device of static shaft shoulder friction stir welding and an additive manufacturing method. The static shaft shoulder device comprises a stirring head, static shaft shoulders and roller bearings. Working shaft holes of original static shaft shoulders are arranged into concentric stepped holes, the stepped holes comprise the upper stepped hole, the middle stepped hole and the lower stepped hole from top to bottom, and the stirring head is sleeved with a centering bearing; the centering bearing is arranged in the upper stepped hole to assist centering, to increase stiffness of the stirring head and to solve the problem that due to the overlong stirring head, the large eccentricity and friction of the inner walls of the static shaft shoulders, premature fracture and efficacy losing of a stirring needle occur; and the roller bearings are vertically arranged on the side portions of the stepped holes and protrude out of the lower end fracture surfaces of the static shaft shoulders, and an auxiliary pressing workpiece is arranged to solve the difficulty that due to narrow spaces of the static shaft shoulders, clamping is difficult. According to the static shaft shoulder device of static shaft shoulder friction stir welding and the additive manufacturing method, non-allowance near-net forming friction stir additive manufacturing is achieved.

The invention provides an alloying component and a preparation method thereof. The alloying component takes high-entropy alloy as a matrix, and uses a carbon nano tube and rare earth nano particles asreinforcements, wherein the expression of the atomic percent of the high-entropy alloy is LxMyNz(Fe2/3Nb1/6Ta1/6)100-x-y-z; L comprises at least one of B, Mg, Al, Si, Sr, Ga, Ge, Sn, Sb and Bi; M comprises at least one of Cu, Co, Cr, Ni, Mn, Ag, Zn, V, Ti, Zr, Mo, Hf and W; N comprises at least one of Er, Y, Sc, Nd, Dy, Tm and Gd; and x is larger than or equal to 0 and smaller than 100, y is larger than or equal to 0 and smaller than 45, z is larger than or equal to 0 and smaller than 10, and the sum of x+y+z is larger than or equal to 0 and smaller than 100. The invention can provide the alloying component which refines grains to enables material compositions to be distributed more uniformly, and improves the grain boundary performance and the grain boundary corrosion resistance and thepreparation method of the alloying component.

The invention relates to the technical field of design of additively manufacturing machine tool parts, in particular to a device for easily peeling forming parts obtained by additive manufacturing on a printing table. The device comprises a printing base, a preheating substrate, two printing substrate groups and two jacking mechanisms, wherein each printing substrate group comprises a plurality of printing substrate units; the plurality of printing substrate units are arranged in parallel at intervals; the preheating substrate is arranged on the printing base; the two printing substrate groups are separately arranged above the preheating substrate; one printing substrate unit of the other printing substrate group is arranged between every two adjacent printing substrate units of one printing substrate group; each printing substrate group is in driving connection with one corresponding jacking mechanism; and the jacking mechanisms are used for driving the corresponding printing substrate groups to vertically move. According to the device for easily peeling the forming parts obtained by additive manufacturing on the printing table, provided by the invention, the two substrate groups vertically move in a spaced manner, so that objects formed on the printing substrates can be effectively sheared, and the forming parts bonded on the printing substrates are peeled with less labor.

The invention belongs to the technical field of medical equipment and discloses a 3D printed cerebral hemorrhage puncture drainage path positioning device and a preparation method thereof. The positioning device comprises a fixed seat provided with an attachment part attached to the brain outline of a patient, a guide support is arranged on the fixed seat, and a puncture channel pointing to a hematoma center of the brain of the patient is formed in the guide support. The problem of inaccurate puncture positioning on the patient is solved, the puncture positioning accuracy is improved, the lifesafety of the patient is guaranteed, the operation is convenient, and the success rate of puncture surgery is increased.

A noise suppression apparatus includes a body portion including a plurality of nested channels, each channel of the plurality of nested channels including a first end opening and a second end opening, and a surface portion including each first end opening and each second end opening of each channel.

The invention discloses a laser-assisted graphene tooth 3D printing process. The technique is combined with the graphene and the laser heat treatment technique, a high-quality graphene tooth is obtained through 3D printing, the graphene is added into a tooth base material, the property of the base material is not changed, the coefficient of thermal expansion of the tooth is reduced, the overall mechanical property is improved, and the ultra-intense laser is radiated on the tooth material in the laser heat treatment technique to improve the wear resistance, the metal-ceramic binding tightness and the material density of the tooth material. Based on the laser, the characteristics of instantaneous high temperature, controllable irradiation and short quenching time are provided, the printed graphene tooth not only is accurately fitted with the alveolar ridge of a patient, but also is high in stability, wear resistance and mechanical strength, a plurality of tests like the metal-ceramic binding strength test, the thermal expansion coefficient experiment and the surface roughness test indicate that the graphene tooth prepared through the technique has better properties than the traditional material, and has an industrialized development future.

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 relates to a method for improving the durability of a GH3536 alloy manufactured by a selective laser melting technology, and belongs to the technical field of alloy melting. The heat treatment process of the GH3536 alloy is adjusted, the heat treatment process of the alloy is optimized, so that the typical high-temperature endurance performance of the alloy is achieved, and the method has great significance in the SLM technology and alloy application. The method has the beneficial effects that the typical high-temperature endurance property of the GH3536 alloy prepared by the SLMcan reach the forging standard, and the anisotropy of the endurance property of the alloy caused by the non-uniform structure of the alloy prepared by the SLM is eliminated.

The invention provides a photocurable polyester oligomer for 3D printing as well as a preparation method and application thereof. The preparation method comprises the following steps of: carrying outvacuum heating dehydration on an aliphatic hydroxyl acid monomer to prepare a polyester prepolymer, adding an initiator in the presence of polyol to prepare a hydroxyl-terminated prepolymer by a meltcopolymerization method, and finally adding acrylic acid anhydride to prepare the photocurable aliphatic polyester oligomer. The prepared photocurable aliphatic polyester oligomer can be directly combined with a photoinitiator, and is suitable for DLP type 3D printing. The photocurable aliphatic polyester resin material prepared by the method is high in purity, relatively low and adjustable in viscosity, can be used in the biomedical field, especially in the fields of drug sustained release, tissue engineering, bone fixation, repair materials and the like, a photocuring polyester degradation material is combined with a 3D printing technology, the printed material is non-toxic and has excellent biocompatibility and mechanical properties, the degradation rate is between 6 months and 36 months, and a new direction is provided for application of 3D printing.

The invention discloses a laser composite additive manufacturing method for controlling flowing of a molten pool based on pulse laser, and belongs to the field of laser advanced additive manufacturing. The laser composite additive manufacturing method comprises the steps that continuous laser beams are used for melting the surface of a base material and alloy powder, pulse laser beams are introduced to conduct synchronous impact treatment on the molten pool while the molten pool is formed, and the laser composite additive manufacturing process of controlling the molten pool through the pulse laser is executed; and in the manufacturing process, the morphology and flowing of the molten pool are controlled through the pulse laser beams, the flatness of a cladding surface is improved, the residual stress in a cladding layer is adjusted, and the anisotropy of the performance of the cladding layer is reduced. The forming quality and residual stress of the cladding layer are improved, meanwhile, the flatness and mechanical performance of the cladding layer are improved, the production efficiency can be improved, the method is suitable for continuous multi-lap-joint or multi-layer stacked laser additive manufacturing work, and the method is suitable for the field of laser additive manufacturing of surface remanufacturing repair or 3D printing direct forming.

The invention provides a copolymerized nylon powder material used for selective laser sintering, and a preparation method thereof. The method comprises the following steps: carrying out a copolymerization reaction on a short-chain nylon raw material and a long-carbon chain nylon raw material by using a copolymerization reaction principle to obtain copolymerized nylon resin, carrying out cryogenic crushing, drying and screening on the copolymerized nylon resin, and adding a flow aid and an antioxidant to obtain the copolymerized nylon powder material used for selective laser sintering. The preparation method has the advantages of simple process and easiness in control, and copolymerized nylon powder particles have a narrow particle size distribution, can be well used in secondary molding, and is suitable for being used in the field of manufacturing of additional materials.

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 provides a high-precision 3D printing method and device for an unconventional rock model. The method comprises the steps that the pore structure and the porosity of a to-be-printed rockcore are determined; a to-be-printed model of the to-be-printed rock core is constructed according to the pore structure and the porosity; the mineral composition components and the mineral proportionof the to-be-printed rock core are determined, and a to-be-printed material of the to-be-printed rock core is determined according to the mineral composition components and the mineral proportion; and a to-be-printed model is input into a 3D printer, the 3D printer prints the to-be-printed model through the to-be-printed material, and a rock core model corresponding to the to-be-printed rock coreis obtained. At least one rock core model printed by the 3D printer is completely consistent with the to-be-printed rock core, therefore, various geophysical parameter information obtained through measurement of the rock core model can truly represent geophysical parameter information of a to-be-developed stratum, and then the petroleum and gas exploration and development efficiency is improved.

The invention discloses a method for constructing a three-dimensional structure based on digital light processing. The method includes the following steps that firstly, a photosensitive resin precursor solution comprising monomers and a light initiator is put into a plane die cavity; secondly, a DLP projector is used for conducting multiple times of local projection and exposure curing on the photosensitive resin precursor solution according to a preset two-dimensional pattern, and a heterogeneous two-dimensional plane is obtained; and thirdly, the heterogeneous two-dimensional plane obtained through curing is soaked into a solvent to be swelled, and a three-dimensional structure is obtained. The method is simple, convenient to implement and low in requirement for equipment and is much suitable for preparing accurate three-dimensional structures of polymers.

The invention relates to a porous elastic foam production method based on 3D printing of wet cured silica gel. More than eight layers of foam materials are produced by utilizing a fluid printer. Each layer of foam material is formed by uniformly arranging patterns of different shapes, and the patterns are classified into five types, i.e. a rectilinear type, a sinusoid wave type, an 8 type, a winding type, and a side-kick type; the processing technological parameters are silica gel viscosity R, silica gel ejection flow rate Q, a diameter D of a spray head, a height H of the spray head and a moving speed UO of the spray head; among the technological parameters, the silica gel viscosity R, the silica gel ejection flow rate Q and the diameter D of the spray head are conventional technological parameters, the height H of the spray head is 6 to 51 mm, and the moving speed UO of the spray head is 2 to 14 mm/s; pattern parameters are a vibration amplitude W of a graph, a periodic length P of the graph and a loop width of the graph; and a porosity of a finished product is 30 to 50 percent, and an elastic modulus is greater than 5.0KPa. Average time for producing the porous silica gel elastic foam in a 3D printing manner is 50 to 70 min, and the production efficiency is greatly improved.

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.