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937 results about "Direct writing" patented technology

Direct Writing. While automatic writing is produced by spirit using the arm and hand of the medium, direct writing (also known as independent writing) is produced purely by spirit. Direct writing can appear anywhere, on any substance. It has often appeared at the sites of poltergeist activity, written on walls, floor, or ceiling.

High-precision bio-compound 3D printing device and printing method

The invention discloses a high-precision bio-compound 3D printing device and a printing method. The high-precision bio-compound 3D printing device comprises a cell printing spraying head and an electrostatic direct writing device which are arranged above a collection platform and are connected with a motion control module, wherein the cell printing spraying head is connected with an ultra-precision injection pump; the electrostatic direct writing device is connected with a reflux heating device; a main unit and a high-voltage direct current power supply are arranged outside an ultra-clean experiment table; the electrostatic direct writing device, the cell printing spraying head and the high-voltage direct current power supply are connected with the main unit. The printing method comprises the following steps: the main unit automatically switches the cell printing spraying head and the electrostatic direct writing device to print a cell-containing gel / biological scaffold / micro-channel compound structure; after the printing of one layer is completed, the cell printing spraying head and the electrostatic direct writing device move a distance equal to the thickness of one layer in the Z-axis direction for printing of the next layer, and repeating till all tissue organs to be printed are completed in printing. The high-precision bio-compound 3D printing device can stably and precisely print compounds of various cells and submicron or nano-level biological scaffolds.
Owner:XI AN JIAOTONG UNIV

Laser-guided electrospinning direct writing device

The present invention provides a laser-guided electrospinning direct writing device capable of realizing long-time controllable preparation and precise positioning of single uniform micro/nanostructure. The device is provided with a controller, a high-voltage relay, an electrostatic high-voltage [power] source, a hollow nozzle, a collimating focusing lens set, optical fibers, a sealing adjusting part, a laser, a solution feed pump, a solution feed pipe, a collecting board and a motion platform, wherein the controller is connected with the high-voltage relay; ends of the high-voltage relay are respectively connected with the electrostatic high-voltage [power] source, the collecting board and a conductor nozzle arranged at the front end of the hollow nozzle; the sealing adjusting part is in a sealing connection with the rear end of the hollow nozzle; the optical fibers pass through the center of the sealing adjusting part and are fixedly connected with the sealing adjusting part; the collimating focusing lens set is arranged at the front end of the optical fibers; the rear end of the optical fibers comes out of the hollow nozzle and is connected with the laser; the solution feed pump is communicated with the hollow nozzle through the solution feed pipe; and the collecting board is fixed on the motion platform and faces the hollow nozzle. The laser constraints the disordered motion of spinning jet flow and guides the spinning jet flow to deposit at the laser spot of the collecting board.
Owner:XIAMEN UNIV

Multi-material laser direct writing conformal system and method

The invention discloses a multi-material laser direct writing conformal system and a method. The system comprises a vacuum seal case, a multi-joint mechanical arm, a multi-material laser direct writing head and a control system for controlling the constituent parts, wherein the mechanical arm and the laser direct writing head are arranged in the vacuum seal case; the laser direct writing head comprises a direct writing head body, a laser and at least two groups of material cylinders; a material channel and a laser focusing channel communicated with the laser and the material cylinders respectively are arranged on the direct writing head body; and the at least two groups of material cylinders are arranged on the direct writing head body in parallel. A particular process is as follows: the mechanical arm drives a workpiece to move along a set path; a material controller selects the corresponding material cylinders; a discharge head delivers and allows materials to be attached to the surface of the workpiece; and at the same time, laser light emitted from the laser focusing channel carries out solidifying or sintering forming on the attached materials. According to the invention, a control process is simple, the forming precision is high, continuous production is achieved, and production efficiency is improved.
Owner:CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI

Electrospinning direct-writing closed-loop control system and control method

The invention relates to an electrospinning direct-writing closed-loop control system and a control method, which relate to electrospinning direct writing equipment. The invention provides the electrospinning direct-writing closed-loop control system which is capable of realizing the controllable adjustment of the electrospinning direct-writing nano fibre diameter and improves the jet injection stability of spinning and the uniformity of nano fibre diameter and the control method of the electrospinning direct-writing closed-loop control system. The system comprises a liquid storage tank, a liquid feeder, a spinning nozzle, a collecting plate, a weak current detector, a temperature sensor, a humidity sensor, a data collector, a control computer, a direct current high voltage power supply and an adjustable frame. The system establishes a fuzzy controller to obtain the jet injection state by detecting the spinning current, adjusts the applied voltage and the flow rate of the feeding liquid according to the change of the spinning current so as to avoid the influence of various interference factors and realize long time stable jet of the spinning jet flow. The set current of the fuzzy controller is adjusted to control the electrospinning direct-writing nano fibre diameter. The electrospinning direct-writing closed-loop control system is beneficial to improving the controllability of the electrospinning direct-writing nano fibre diameter and well promoting the industrialized application of the electrospinning direct-writing technology.
Owner:XIAMEN UNIV

Method for manufacturing micro-polarizer array based on metal nanometer grating

ActiveCN103760681ASmooth edgesSmooth edges to ensure excellent polarization effect smoothPhotomechanical apparatusPolarising elementsGratingDirect writing
The invention relates to a method for manufacturing a micro-polarizer array based on a metal nanometer grating. The method comprises the steps that (1) a substrate is coated with a metal film layer, and the metal film layer is dried; (2) the metal film layer is coated with an electron beam positive photoresist layer in a spinning mode, and the electron beam positive photoresist layer is dried; (3) electron beam direct writing, exposure and developing are conducted on the photoresist layer, and then a photoresist nanoscale micro-polarizer array graph is obtained; (4) inductive coupled plasma is used for etching, wherein the photoresist layer with the image is used as a mask, the metal film layer is etched, and therefore the image is transferred to the metal film layer; (5) the photoresist layer is removed, and then the micro-polarizer array is obtained. The method for manufacturing the micro-polarizer array based on the metal nanometer grating is easy to implement. According to the method for manufacturing the micro-polarizer array based on the metal nanometer grating, the micro-polarizer array with multiple different polarization directions can be obtained through one-time exposure and developing; the polarization performance of the micro-polarizer array manufactured according to the method is high.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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