63 results about "Direct printing" patented technology

The invention discloses a design and preparation method of a personalized gradient thickness invisible orthodontic appliance model, relates to the technical field of tooth orthodontics, and aims to overcome the defects that the thickness is uncontrollable and preset mechanical properties cannot be accurately realized when an invisible orthodontic appliance is manufactured by a traditional hot press molding process. The method comprises the following steps: firstly, reconstructing a personalized dental model containing tooth roots and bone tissues based on CBCT data of a patient; designing a plurality of gradient thickness appliance schemes; through finite element analysis and simulation, selecting an optimal scheme which is most favorable for realizing correction effects such as overall movement of teeth; and finally, integrally forming and manufacturing the selected appliance by adopting a direct 3D printing technology. The direct 3D printing ensures that the appliance can be manufactured in a high-precision and high-fidelity manner from a complex gradient thickness structure with thick gingiva and thin occlusal surface, so that the optimized mechanical property verified by simulation can accurately reproduce in a real object, the inherent defects of a hot-pressing film process are thoroughly overcome, and the accuracy and predictability of correction are remarkably improved.

The invention relates to the technical field of energy storage materials, and provides a composite solid polymer electrolyte membrane and a preparation method thereof.The composite solid polymer electrolyte membrane is prepared through the steps that a polymer matrix serves as a matrix, a polar solvent is adopted for dissolving to form a pure polymer solution, then lithium salt and nematic phase liquid crystal E7 are added, a chiral dopant can also be added, uniform printing slurry is formed, and the composite solid polymer electrolyte membrane is obtained through 3D printing. And carrying out hot pressing treatment to prepare the composite solid polymer electrolyte membrane. The electrolyte membrane prepared by the invention has a controllable porous structure, a high dielectric constant and excellent piezoelectricity and energy storage performance, complex structures such as a three-dimensional grid and a porous structure can be directly printed, and the thickness and shape of the membrane can be accurately controlled by adjusting parameters such as a printing path, a layer height and filling density; the method is very suitable for the requirements of rapid customization of product shapes and sizes in the fields of flexible electronics, wearable equipment and the like. The invention also provides an application of the composite solid polymer electrolyte membrane prepared by the method in an energy storage device.

Method for manufacturing a flexible strain sensor, comprising: Placing a flexible substrate on a movable stage in a working chamber, in which the movable stage, suitable for a desired movement according to a control signal, and a nozzle, suitable for spraying towards an upper surface of the movable stage, are installed, and with which a first pressure control unit, suitable for controlling an internal pressure of the working chamber, is combined; and preparing a printing material mixture, which comprises metal nanoparticles and carbon nanotubes (CNTs) in a powder form, which is to be introduced into a printing material tank, which is provided with an upper outlet that communicates with a nozzle via a first communication line, and a lower inlet, with which a second pressure control unit, suitable for controlling pressure, is combined. Control, by means of a control unit, a movement of the movable stage by providing a predetermined motion control signal to the movable stage in order to move the flexible substrate at a desired speed along a path which corresponds to a predetermined conductor pattern of a strain sensor, Forming a relatively low-pressure atmosphere within the working chamber by operating the first pressure control unit and simultaneously a relatively high-pressure atmosphere at a lower inlet of the pressure material tank by operating the second pressure control unit, In parallel with controlling the movement of the movable stage, the printing material mixture is forcibly transmitted in an aerosolized state through the first communication line from the printing material tank to be sprayed through the nozzle towards a surface of the flexible substrate by means of a compression wave, which is caused by a pressure difference between the low-pressure atmosphere and the high-pressure atmosphere. Direct printing of a predetermined conductor pattern of the strain sensor onto the flexible substrate by a process in which the printing material mixture, which is extruded through the nozzle, collides with the surface of the flexible substrate to create cracks on the surface, and the CNTs penetrate into the cracks and are mechanically anchored to the flexible substrate, and then the following metal nanoparticles and CNTs of the printing material mixture are deposited in a predetermined width and height on the surface of the flexible substrate. Connecting a first and a second lead wire, which extend electrically to protrude from the flexible substrate, to both ends of the predetermined conductor pattern of the strain sensor and Binding a flexible cover, which has the same size as the flexible substrate, to the surface of the flexible substrate on which the predetermined conductor pattern is printed, so that the predetermined conductor pattern is inserted between the flexible substrate and the flexible cover.

The ceramic substrate (1) is monolithic, and it contains an integrated channel (2) for the passage of heat-transfer medium. From the outside the ceramic substrate (1) is adapted for direct printing using conductive patterns (3, 4) and for the direct mounting of electronic components (5) generating waste heat, particularly for the power module applications, for the effective dissipation of waste heat.

The invention discloses an irregular three-dimensional model topological optimization method, which comprises the following steps of: importing an object to be optimized in a three-dimensional model file format, converting the object to be optimized into a mask matrix through a ray scanning method, and acquiring a voxel center coordinate; voxel random sampling coordinates in the model are substituted into a displacement prediction neural network for pre-training, a loss function is set based on a physical information neural network and a minimum potential energy theorem, and a penalty function is introduced and combined with hard displacement constraint to realize displacement fixed constraint; and performing cross training on the density prediction neural network and the displacement prediction neural network to obtain a topological optimization result. According to the method provided by the invention, the problems that a professional needs to apply professional software to carry out topological optimization on the irregular three-dimensional model and takes a long time, and the optimization result has an islanding effect and the like in the related technology are solved. The three-dimensional model improved by the method can be directly printed by utilizing three-dimensional printing equipment, and finally a real object corresponding to a topological optimization result can be obtained.

The utility model discloses a novel heat exchange module control box of control technical field, including host case, the bottom fixedly connected with a bottom plate of host case, the top fixedly connected with display screen control panel of bottom plate, the one end fixedly connected with bottom electric control board of bottom plate close to display screen control panel, and the top electric control board is provided with in the top of bottom electric control board of bottom plate. Host case inside is provided with special installation chamber, and the fixing, installation and wiring work of circuit element, terminal are convenient, guarantee the neat and safety of internal circuit, and the maintenance process is simplified. Adopt microprocessor as core control unit, realizes accurate temperature control and circulating pump speed adjustment and so on function, and is equipped with multiple protection mechanism (such as overload protection, short circuit protection etc.), ensures the stable operation of system and personnel safety. Integrated efficient data processing module can automatically record the data of each operation, and supports data export or direct printing output, is convenient for subsequent analysis and archives.

A method and system for fabricating reflective traffic signs for scale model applications. A scaled traffic sign image is generated using graphic design software and printed onto a transparent or reflective medium. The printed signage layer is bonded to a reflective substrate and affixed to a rigid backing material such as aluminum. The sign is then mounted on a scale stand formed from metal, plastic, or wood. Various fabrication techniques may be used, including water transfer of printed images using clear tape, printing onto acetate, or direct printing onto reflective material. In some embodiments, 3D-printed structural supports are used to house light-emitting diodes (LEDs) to simulate illuminated signage. The resulting scale signs replicate the appearance and reflective characteristics of full-size traffic signs and are suitable for use in model railroads, dioramas, architectural layouts, and educational displays.

The invention relates to the technical field of additive manufacturing, in particular to an advanced packaging RDL additive manufacturing method based on electric field driving spray deposition, and adopts an electric field driving spray deposition micro-nano 3D printing technology. Successively printing a first dielectric layer and a first circuit pattern layer formed by printing conductive paste on the substrate according to a set printing mode and process parameters; the method comprises the following steps: firstly printing a first dielectric layer, then continuously printing a second dielectric layer, punching the second dielectric layer, filling holes with conductive slurry to realize inter-layer circuit interconnection, then printing a second circuit pattern formed by printing the conductive slurry, and repeating the steps of printing the dielectric layer and the circuit pattern and the steps of punching and filling holes so as to complete the preparation of the multilayer RDL; according to the method, integrated rapid manufacturing of the multi-layer rewiring structure is achieved through direct printing and interlayer interconnection of the dielectric layers and the high-precision wires, the problems that a traditional RDL technology is complex, long in period and poor in flexibility are solved, particularly, the method has unique advantages in the design verification stage, and rapid prototype verification of the RDL can be achieved.

The invention discloses a preparation method of porous ceramic with a non-uniform fusion structure, which comprises the following steps: step 1, constructing a fusion function, and determining parameters of the fusion function; 2, preparing a wax pattern negative template; step 3, preparing ceramic slurry; step 4, dipping and freezing; step 5, low-pressure drying; and 6, sintering to obtain the TPMS structure porous ceramic. The invention further discloses the porous ceramic with the non-uniform fusion structure. The invention further discloses application of the porous ceramic with the non-uniform fusion structure in the field of bionic bone scaffolds. According to the method, the fusion function is constructed by fusing the G-shaped function and the TPMS function, so that non-uniform fusion of various hole patterns is realized; the mode of wax negative template freezing casting and indirect forming is adopted, the design freedom degree of a complex structure is reserved, meanwhile, the problems of resolution limitation, shrinkage deformation, supporting difficulty and the like during direct 3D printing of the porous ceramic are solved, and the use effect is good.

The invention discloses a novel electronic price tag FPC prepared based on weldable silver paste, which comprises a base material printed with a silver paste circuit, a display unit used for displaying a price tag identifier, a driving unit, a communication unit and a power supply unit welded with the silver paste circuit, and the silver paste circuit is prepared by mixing and printing composite silver powder, an organic carrier and a modifier. The preparation method comprises the steps of (1) substrate pretreatment, (2) preparation of weldable silver paste, (3) silver paste printing, (4) low-temperature curing and (5) component welding. The conductive circuit is formed through direct printing and low-temperature curing of the weldable silver paste with low surface energy and high oxidation resistance, low-temperature welding of components can be realized without a gold plating layer, the process is simple, the production period is greatly shortened, and the equipment cost and the material cost are effectively reduced; the electrical resistivity after curing can be greatly reduced, the matching property of a silver paste circuit and a base material is better, and the bending resistance is effectively improved.

The invention discloses a three-dimensional printing process based on UV digital direct injection and a printed textile product, and relates to the technical field of fabric digital printing. The three-dimensional printing technology comprises the steps that a textile fabric is spread on a workbench in the UV digital printing equipment, direct injection printing is conducted on the textile fabric, instant curing is conducted under UV irradiation, and the printed textile fabric is obtained; ink for direct injection printing is selected from acrylate UV oil-based ink, the content of a monofunctional acrylate monomer in the acrylate UV oil-based ink is not less than 86 wt.%, and the viscosity of the acrylate UV oil-based ink at 25 DEG C is 4-8 mPa.s. According to the technology, direct injection forming can be achieved, prime coat treatment and drying treatment are not needed, the technology can be compatible with fabrics made of various materials, and patterns with the embossment effect can be formed through stacking printing; the acrylic UV oily ink component is preferably selected, so that printed patterns have better adhesion, high tensile strength, low possibility of falling off and good water resistance.

The application belongs to the field of internal combustion engine parts design and manufacturing, and discloses a basalt fiber thermal insulation material design method based on 3D printing. The method comprises the following steps: S1, obtaining a three-dimensional model of a part to be wrapped; S2, preprocessing the three-dimensional model to export a three-dimensional model that can be directly printed, and performing 3D printing on the part according to the three-dimensional model; S3, calling the design parameters of the thermal insulation material according to the product database; S4, modifying the sample fitting based on the printed model; and S5, outputting the design drawing. The method prints the part object by using the 3D printer, can more intuitively evaluate the size and fit of the designed thermal insulation material for wrapping the part, adjusts the drawing in time according to the fitting, saves the part mold opening cost, improves the accuracy of product design, and simplifies the design process.

The invention discloses a bracket-free invisible orthodontic appliance based on direct 3D printing and a digital design and manufacturing method of the bracket-free invisible orthodontic appliance. According to the method, a digital closed-loop process is constructed; firstly, a correction target is set through intraoral scanning and digital tooth arrangement; constructing a smooth envelope space of the appliance by utilizing a contraction wrapping algorithm; accurately segmenting the dental crown by adopting an AI technology based on PointNet + + so as to define a force boundary; generating an appliance digital model with an accurate form and stable mechanics through a thickness control and edge optimization algorithm; finally, based on the DLP technology, the orthodontic appliance is directly printed with biocompatible resin, and the performance and safety of the orthodontic appliance are ensured through strict post-treatment such as secondary curing. According to the method, a traditional film pressing process is omitted, accumulative errors are eliminated fundamentally, personalized gradient design of mechanical properties of the appliance can be realized through process control, and an invisible correction technology is marked to step from shape matching to function matching.

The invention discloses an MXene composite bacterial cellulose intelligent response supercapacitor and application thereof, and belongs to the technical field of capacitor preparation. The invention provides an MXene / bacterial cellulose composite conductive ink system based on 3D printing, direct printing of the MXene / bacterial cellulose composite conductive ink system on a liquid crystal elastomer film is realized, and an intelligent response micro supercapacitor integrating a finger-shaped supercapacitor and a thermal driving film is prepared.

Methods and techniques are provided for using a conductive epoxy to create interconnects across a gap between an embedded integrated circuit chip and a dielectric substrate. The chosen epoxy is adhesive and thixotropic so that it sticks well and won't lose its volume after a drying process. Further, a liquid dielectric ink is used as an underfill material to not only cover and protect the interconnects but also act as a dielectric layer. This allows as for additional dielectric layers with corresponding interconnects and vias to form a multilayer structure with additional embedded chips. The disclosed methods and techniques can be implemented using direct print additive manufacturing processes.

The invention discloses a non-contact in-situ circuit pattern printing method and device, and the method comprises the steps: preparing functional ink which adopts a viscoelastic spinning solution; functional ink is filled into an inner needle head channel of the coaxial air spinning nozzle; guiding airflow with constant pressure is introduced into an outer needle head channel of the coaxial air spinning nozzle through a pressure controller, so that the functional ink extruded from an inner needle head is stretched and focused into continuous fiber jet flow; extruding airflow with constant pressure is introduced into the inner needle head channel through the pressure controller, the motion control device controls and drives the coaxial air spinning nozzle to move according to a preset digital path, and meanwhile, the constant distance between the tail end of the coaxial air spinning nozzle and the surface of the target substrate is kept, so that a fiber network structure is formed on the surface of the target substrate, and a circuit pattern is obtained. According to the invention, high-conformality and personalized circuit patterns can be directly printed on the three-dimensional non-planar human skin surface, and high-fidelity and high-resolution perception of human actions and physiological information without feeling wearing is realized.

The invention relates to the technical field of electromagnetic shielding, and particularly discloses a 3D printing electromagnetic shielding component preparation method based on electromagnetic signal detection. Segmenting the collected mixed point cloud of the electrical components, the gaps and the electron carriers through point cloud software, and screening and purifying point cloud features of only reserved gap areas; the electromagnetic shielding component model is transmitted to a fused deposition modeling 3D printer, and a composite wire is loaded through the fused deposition modeling 3D printer to directly print the shielding component on a conductive substrate or adhere the shielding component to the conductive substrate; and according to the electromagnetic radiation intensity and frequency of each electromagnetic element, the direct-writing 3D printer is controlled to print the conductive slurry at the specific position of the electromagnetic shielding component so as to form the composite structure with the electromagnetic shielding function. And the electromagnetic shielding quality is improved.

A kind of degradable metal mesh preparation method based on 3D printing mold, the prepared degradable metal mesh has membrane body, and the membrane body has honeycomb-shaped through-hole structure;The cross section of honeycomb-shaped through-hole structure is composed of multiple regular hexagons.The preparation method comprises the following steps: S1 three-dimensional model design, S2 mold forming, S3 mold pretreatment;S4 smelting, S5 centrifugal casting, S6 cooling and demolding, S7 post-processing obtains the final degradable guided bone regeneration degradable metal mesh.Using the process of "direct 3D printing ceramic casting mold + centrifugal casting", the preparation process is high in precision and good in efficiency.

The invention discloses a digital printing processing method of a garment fabric, and relates to the technical field of garment processing, and the digital printing processing method comprises the following steps: an image acquisition assembly acquires a pattern to be jet-printed, and an image processing unit edits the pattern to obtain a printed pattern; whether the fabric type, the printing mode and the printing parameters are correct or not is checked through the display panel, and if yes, printing processing operation is carried out; if direct printing operation is carried out, a direct printing assembly is adopted for jet printing, and if thermal transfer printing operation is carried out, a thermal transfer printing assembly is adopted; the printing quality is monitored in real time in the printing processing process, if yes, printing processing operation continues, and if not, parameters are adjusted; and after printing processing is completed, drying and cooling operation is carried out, and manual reinspection is carried out. Printing processing operation of different fabric types is achieved through the digital printing equipment, the real-time quality monitoring and feedback adjusting functions are achieved, the printing precision and the yield are effectively improved, the printing precision and adaptability can be improved, and the rework rate and the production cost can be reduced.

The application belongs to the field of engineering design drawing, and discloses a method for batch generating AutoCAD drawing layout with automatically updated title bar. The method completes the identification of specific frame dynamic block reference objects in the model view and the corresponding full-automatic operation process of generating drawing layout, thereby avoiding the cumbersome steps of manually generating multiple drawing layouts. The "hyperlink" feature of the attribute block is used to link the drawing set custom features to the specific frame dynamic block reference objects, so that the title bar information of all drawings is updated when one modification is made, and the batch-generated drawing layout has the feature of direct printing. The batch printing function can be realized by using the drawing set or drawing layout multi-selection printing operation of AutoCAD, thereby improving the drawing efficiency. The application also provides a non-transient readable recording medium storing the program of the method and a system comprising the medium. The program can be called by a processing circuit to execute the above method.

A system for an electric vehicle includes a power switch configured to convert DC power from a battery to AC power to drive a motor; and a three-dimensional printed heat sink (3D heat sink) coupled to the power switch.

The application discloses an inkjet direct printing machine, which comprises a machine body, a workbench, a machine head component, a first transmission mechanism and a second transmission mechanism, the workbench and the machine head component are arranged on the machine body, the first transmission mechanism is connected with the workbench and can drive the workbench to move along the Y-axis direction, the second transmission mechanism is connected with the machine head component and can drive the machine head component to move along the X-axis direction, a nozzle is arranged on the machine head component, and the moving range of the machine head component is smaller than that of the workbench during work. Through the design that the moving range of the workbench is larger than that of the machine head component, the inertial impact of the nozzle caused by large movement is fundamentally reduced, the shaking error of ink ejection is reduced, the definition and color uniformity of a printed pattern are obviously improved, the risk of collision between the nozzle and external objects is reduced, and the service life of the nozzle is prolonged.

The invention provides a method for manufacturing a high-flatness enclosure frame welding area of a copper-based LTCC (Low Temperature Co-Fired Ceramic) substrate, which comprises the following steps of: step 1, embedding copper slurry: embedding the copper slurry at a preset enclosure frame welding area position in a green tape lamination layer to form an embedded copper structure with the same shape as the enclosure frame welding area; and 2, lamination and low-temperature co-firing: carrying out lamination and low-temperature co-firing on the green tape lamination layer embedded with the copper slurry in the step 1 to form the LTCC substrate. And (3) grinding and polishing: grinding and polishing the LTCC substrate obtained in the step (2), so that the surface of the embedded copper structure is exposed and high flatness is achieved. And fourthly, a nickel-gold layer is electroplated, specifically, the exposed surface of the embedded copper structure obtained in the third step is electroplated with the nickel-gold layer, and a surrounding frame welding area is formed. According to the method, the influence of substrate warping can be effectively avoided, the influence of substrate warping caused by direct printing on the warping surface is avoided by embedding the enclosure frame welding structure into the substrate and grinding and forming the enclosure frame welding structure after sintering, and the problem of unevenness of a welding area is fundamentally solved.

The application discloses a forming method of a duplex stainless steel propeller, and is specifically implemented according to the following steps: step 1, a casting process of the duplex stainless steel propeller is designed, and a sand mold used in the casting process is designed by using three-dimensional modeling software; step 2, a designed sand mold is formed by using a 3D printing technology, then the printed sand mold is detected and trimmed, then the sand mold is assembled into a sand box and is filled with sand around the sand mold, and thus a mold cavity required for forming the propeller can be obtained; step 3, duplex stainless steel liquid metal is poured into the mold cavity, and a complete propeller casting is obtained; and step 4, the propeller casting obtained in step 3 is subjected to heat treatment, and a final propeller casting is obtained. The method of pouring metal into a mold cavity formed by 3D printing a sand mold solves the problems of sand dropping, forming difficulty and low strength in the existing 3D printing resin model re-sand casting or 3D direct printing metal propeller technology.

The invention provides high-color-fastness disperse dye direct-injection ink and a preparation method thereof, and a process method of disperse dye ink direct-injection printing, the high-color-fastness disperse dye direct-injection ink comprises disperse dye color paste, a self-crosslinking agent, a penetrant and a moisture absorbent; and the self-crosslinking agent is selected from resin with the self-crosslinking temperature of 45-60 DEG C. Under the combined action of the self-crosslinking agent, the penetrant and the moisture absorbent, the disperse dye direct-jet ink jet-printed on the fabric has high rubbing fastness, high washing fastness and excellent pattern definition and color expressive force, and meanwhile, the procedures of pretreatment sizing and post-treatment washing can be omitted; the process flow is simplified, the production cost is controlled, and the environmental pollution is greatly reduced.

The utility model discloses a printer with an editable printing position. The printer comprises a supporting assembly, a printing head and a movable positioning set. The printing head and the movable positioning group slide on the supporting assembly; when the printing head moves to the mobile positioning group, the printing head performs printing operation; according to the technical scheme, printing can be directly conducted on the cover or the inner pages of the book, the cover or the inner pages do not need to be disassembled and assembled repeatedly, the step of disassembling and assembling the cover and the inner pages is omitted, and therefore the structure of the book is kept complete all the time, wrinkles are avoided, and the influence caused by disassembling and assembling the cover is eliminated.

The invention discloses a 3D printing preparation method of a metallic bond diamond grinding wheel, an aluminum substrate and a metallic bond diamond grinding wheel block are directly printed and formed in a 3D printing mode, and the working procedures of machining forming of the substrate, cold pressing and sintering forming of the diamond grinding wheel block, bonding of the diamond grinding wheel block and the substrate and the like in the grinding wheel manufacturing process are reduced. And the machining efficiency is improved, the equipment requirement in the grinding wheel preparation process is reduced, the use of an adhesive is avoided, dust in the preparation process is reduced, and the environmental protection property in the grinding wheel preparation process is improved.

The application discloses a kind of nanofiber-based materials with dual-mode thermal management and health detection function and its preparation method and application, belong to nanometer material technical field.The application integrates radiation heating nanofiber, radiation cooling nanofiber, fiber-based strain sensor and temperature sensor into one body.Radiation cooling layer is composed of TPU nanofiber with high mid-infrared emissivity and high reflectivity.Radiation heating layer is composed of CNT / TPU nanofiber with high absorptivity.The strain sensing layer with high sensitivity of wrinkle structure and crack structure is sandwiched between radiation cooling layer and radiation heating layer, which can monitor human respiratory signal in a non-restricted manner.The temperature sensing layer is directly printed on the TPU nanofiber layer by ink direct writing 3D printing technology.Benefiting from the network structure of TPU nanofiber, the material has excellent waterproofness and air permeability, and can be worn comfortably for a long time.