1282results about How to "Improve printing accuracy" patented technology

The invention discloses a melt differential three-dimensional printer. The melt differential three-dimensional printer mainly comprises a material melting unit, a micro-droplet jetting unit, a cylindrical-coordinate system molding unit and a rack, wherein a servo motor drives a screw rod to rotate in the material melting unit; a heater, which is fixedly arranged inside a machine cylinder, ensures that granules are entirely plastified through temperature regulation; a molten material is transmitted by the screw rod to the micro-droplet jetting unit; in the micro-droplet jetting unit, the molten material is transmitted into a valve body through a hot runner in a runner plate; a linear servo motor drives a valve needle to do reciprocating motion in the valve body so as to quantitatively and intermittently squeeze the molten material out of a nozzle to form melt micro-droplets; in the cylindrical-coordinate system molding unit, the molten micro-droplets are injected to a bearing table for cooling and deposition molding; the servo motors in the left-right direction and in the vertical direction are respectively engaged with the corresponding screw rod to rotate so as to drive the material melting unit and the micro-droplet jetting unit to move along the left-right direction and the vertical direction; a circumference servo motor drives the bearing table with a worm gear to rotate through a worm rod so as to realize three-dimensional movement under a cylindrical-coordinate system.

The invention discloses a light-curing three-dimensional printer based on digital light processing (DLP) projection, which comprises a computer system (2), an automatic control system, a DLP projection system (1), a molding work pool (3), a feeding system (4) and a lifting system. Compared with the three-dimensional printer in the prior art, the light-curing three-dimensional printer has the advantages of high molding speed and high printing precision, and the surface of a molded product is continuous and is not layered; moreover, the DLP projection-based light-curing three-dimensional printer can be applied to performing light curing on light-sensitive materials with various strengths and made from different raw materials.

The invention discloses a full-automatic high-precision double-printing-platform screen printing machine. The full-automatic high-precision double-printing-platform screen printing machine comprises a machine frame, material conveying mechanism, a screen printing plate mounting and alignment mechanism and a screen printing mechanism and further comprises a double-printing-platform transfer assembly located on the machine frame, wherein the material conveying mechanism is located on the machine frame; the double-printing-platform transfer assembly comprises a positioning position, a printing position, a lifting printing platform and a printing platform, the lifting printing platform and the printing platform are located in the positioning position or the printing position alternately and switched between the positioning position or the printing position; the material conveying mechanism is used for conveying to-be-printed materials to the positioning position; and the screen printing plate mounting and alignment mechanism and the screen printing mechanism are arranged above the printing position for printing the to-be-printed materials located in the printing position. By means of the full-automatic high-precision double-printing-platform screen printing machine, while one to-be-printed material is printed, another to-be-printed material is automatically fed onto the printing platform and photographed and positioned, and the technical problems that most of existing full-automatic flexible-plate screen printing machine adopts single-platform linear material conveying, and consequently the system efficiency is low are solved.

The invention discloses a liquid metal printing device. The device comprises a liquid metal printing mechanism, a substrate movement mechanism connected with the liquid metal printing mechanism, a voltage pulse regulating and controlling mechanism connected with the liquid metal printing mechanism and the substrate movement mechanism, and a control device connected with the liquid metal printing mechanism, the substrate movement mechanism and the voltage pulse regulating and controlling mechanism. The liquid metal printing device is used for liquid metal ink which is low in viscosity and high in surface tension, and not only are the printing precision of liquid metal patterns and wettability between liquid metal and a base improved, but also plane printing and space 3D printing can be achieved.

The present invention relates to a printing machine. In the concrete, it relates to a printing machine capable of making personalized synchronous double-sided digital ink jet on the flexible rolled materials, such as paper, plastics and fabrics, etc. Said printing machine includes wall boards and feeding device, receiving device and guide device which are mounted on the wall boards, between wall boards, a front face printing drum and a back face printing drum are placed. The spray-printing material on the feeding device can be winded on the back face printing drum by adopting rubbing contact mode, and the back-printing face of back-printed spray-printing material can be winded on the front face printing drum by adopting rubbing contact mode, then the double-face printed spray-printing material can be passed through the described guide device and can be winded on the receiving end of receiving device.

The invention relates to the technical field of silk-screen printing equipment, particularly to a system and method for aligning silk-screen printing. A silk screen plate and a lifting table are arranged on a silk-screen printing machine, a fixture is arranged on the silk screen plate, an XYR micro-motion platform is arranged on the lifting table, a vacuum chuck is arranged on the XYR micro-motion platform, the vacuum chuck is used for adsorbing a printing stock, and the printing stock corresponds to a position under the silk screen plate; a first positioning mark is arranged on the silk screen plate, and a second corresponding positioning mark is arranged on the print stock; the fixture is used for regulating the height and the two-dimension plane coordinates, which are relative to those of the silk screen plate, of an imaging and amplifying camera, the XYR micro-motion platform is used for regulating the two-dimension plane coordinates of the print stock and rotating the print stock, the lifting table is used for regulating the height of the printing stock, the first positioning mark on the silk screen plate and the second corresponding positioning mark on the print stock are collected by the imaging and amplifying camera, and the position and the direction of the printing stock are regulated through the XYR micro-motion platform and the lifting table, so that the first positioning mark and the second positioning mark are accurately aligned, and the effect that a blanking region of the printing stock and a pattern on the silk screen plate are accurately aligned is achieved.

In a method of producing a multi-terminal type laminated ceramic electronic component in which internal electrodes are embedded in a sintered ceramic member, and the internal electrodes have plural first lead-out electrodes led out to a first side surface and plural second lead-out electrodes led out to a second side surface, the plural second lead-out electrodes of one of the adjacent internal electrodes in each internal electrode pattern are not continuous with the plural first lead-out electrodes of the other of the adjacent internal electrodes, and the plural second lead-out electrodes and the plural first lead-out electrodes are alternately arranged in a direction that is substantially perpendicular to the direction of a line connecting the first and second side surfaces.

The invention relates to the technical field of 3D printers and printing methods, in particular to a rapid prototyping SLA 3D printer. The rapid prototyping SLA 3D printer comprises an SLA 3D printer body, wherein the SLA 3D printer body comprises a hollow cabinet body and a support which extends upwards along one side surface of the cabinet body, wherein a laser scanning device is arranged at the front end of the bottom surface of the cabinet body, a reflecting mirror is arranged at the center of the bottom surface of the cabinet body, a resin trough is arranged right above the reflecting mirror, the bottom surface of the resin trough is fixedly provided with a piece of high-transparency quartz glass, the high-transparency quartz glass is fixedly arranged on an iron plate, the iron plate is fixedly connected with a motor on the bottom surface of the cabinet body, a lifting platform is arranged right above the resin trough, the support is provided with a vertical slide rail, and the lifting platform can slide up and down along the vertical slide rail. The invention also discloses a printing method of the rapid prototyping SLA 3D printer. Compared with the prior art, the rapid prototyping SLA 3D printer has the advantages that the prototyping speed is high; since a downward-pulling mechanical structure for eliminating the vacuum force is arranged, the rate of finished products is greatly increased, the precision is high, and the printer is particularly suitable for producing a prototype with high precision requirement and a complicated structure; the structure is simple, the operation is convenient, and the production cost is greatly reduced; therefore, the rapid prototyping SLA 3D printer can be widely popularized and used.

The invention discloses a high-precision electric field driven spray deposition 3D printer and a working method thereof, and solves the problems of a traditional 3D printer on multiple aspects of resolution, stability and controllability; high-precision printing of multilayer structures can be realized; the printing process is observed and monitored in real time; and high-precision pattern printing is performed on insulation substrates through electric conducting materials. The high-precision electric field driven spray deposition 3D printer comprises a mounting baseplate; a Y-axle worktable is arranged on the mounting baseplate; a vacuum absorption platform is fixed on the Y-axle worktable; a printing substrate is absorbed on the vacuum absorption platform; a printing nozzle and a vertical observation camera are correspondingly arranged above the printing substrate, and are connected to a Z-axle worktable; the Z-axle worktable is fixed on an X-axle worktable; a squint observation camera is correspondingly arranged on one side of the printing nozzle; an LED light source and a far infrared curing light source are correspondingly arranged on the other side of the printing nozzle; theprinting nozzle communicates with a storage bottle; and the storage bottle is arranged on a lifting table.

The invention relates to a 3D printer capable of printing continuously at an outage and a method for controlling the 3D printer to continue printing at the outage and belongs to the technical field of 3D printing. The 3D printer comprises a power module capable of storing electric energy, an outage detection module used for detecting the power supply state of an external power source, and a control module which controls all components of the printer to switch between the power supply state and the outage state. By means of the method, the printer can use the stored electric energy to record the work state at the outage, and all the components are set to be in the outage state; when power supply is recovered, the printer can be controlled to return to the previous state and continue last work; as a result, reprinting is avoided, consumable items are effectively saved, and the success rate of printing is increased substantially; furthermore, closed-loop control is achieved in cooperation with a displacement detection module, and the accuracy of continuous printing at the outage is further improved. Moreover, the 3D printer capable of printing continuously at the outage is simple in structure, the method for controlling the 3D printer to continue printing at the outage is easy and convenient to implement, and the application range is rather wide.

The invention discloses a calcium phosphate bone induction biological ceramic stent based on a photocuring 3D printing technology and a preparation method thereof, and belongs to the field of biomedical materials. Through the method, ceramic paste which is high in content of solid, low in viscosity and good in dispersity and fluidity can be effectively prepared. Through the photocuring 3D printingtechnology and follow-up degreasing sintering, the bone induction porous calcium phosphate ceramic stent with an internal penetrating pore structure can be prepared, wherein the shape, size, porosityand macroscopic morphology of the bone induction porous calcium phosphate ceramic stent can be accurately controlled, and the bone induction porous calcium phosphate ceramic stent is used for bone tissue repairing and filling and individualized repairing.

The invention provides an electro hydrodynamic preparation device and method for batch micro-droplets and micro-structures. The preparation device comprises a liquid conveying system, an injection receiving system, a voltage control system, a high-speed photographing system and a bottom platform movement control device. The preparation method includes the steps that a micro-injection pump is utilized to push liquid to a needle head tip from an injector according to a certain flow; fluid is gathered at the needle head tip; under the effect of an electric field, the liquid gathered at the needle head forms a Taylor cone, linear liquid ejected from the tip of the Taylor cone falls onto a receiving substrate, and finally deposited droplets are formed. Bottom platform moves to be matched with continuous ejection of the linear liquid, so batch micro-droplets or micro-structures of certain modes can be prepared.

The invention discloses a 3D ink-jet printer for printing an electronic circuit board through ultrasonic atomization nanometer suspending liquid. The 3D ink-jet printer comprises an ultrasonic atomization nanometer suspending liquid device, a nanometer fine ink-jet printing device, an industrial positioning camera, a video monitor, an infrared laser micro-fusion-covering device, a heatable vacuum absorption workbench, a three-coordinate movable sliding table and a control portion. According to the 3D ink-jet printer, the nanometer suspending liquid to be printed is atomized based on an ultrasonic double-cavity atomization method, the nanometer suspending liquid is sent to a controllable nanometer fine ink-jet printing device through a guide pipe under the action of auxiliary gas and is directly printed on a substrate in a non-contact mode through a fine ceramic nozzle, the printed nanometer sizing agent is solidified and dried through the method of bottom plate heating or infrared laser micro fusion covering, evaporation of the solvent in the sizing agent, gasification of an organic clad layer and fusion of nanometer particles are accelerated, and therefore the electronic circuit board with high conductivity and micron-size line width is formed. The 3D ink-jet printer can directly print a conducting layer, an insulating layer, a protective layer and a solder mask and can print semiconductor components and parts.

The invention provides an electronic paste based on low-melting-point metal micro-nano powders. The electronic paste is composed of low-melting-point metal micro-nano powders, a binder, a solvent and an auxiliary agent. The mass proportion of the low-melting-point metal micro-nano powders in the electronic paste is 45 to 90%. The melting point of low-melting-point metal is -78 to 232 degree centigrade. The electronic paste is suitable for traditional printing methods such as silk screen printing and can be widely used in printing electronic industry, such as front and back electrodes of solar panels, RFID tags, cell phone antennas, non-contact IC card antenna lines, and the like. The electronic paste has the advantages of high printing precision, low sintering temperature, no diffusion after sintering, low breaking rate, small contact resistance and low cost.

The invention discloses a pretreatment liquid for direct injection of polyester fiber through dispersive ink and a direct injection digital printing process. The pretreatment liquid comprises, by mass, 0.2-5 parts of thickener, 1-10 parts of dispersion promoter, 2-5 parts of sodium chloride and 76-95 parts of water. The pretreatment liquid is semi-thick liquid, polyester fabric after going through impregnation or padding treatment liquid is dried, injection printing of dispersive dye ink is performed, high-temperature steaming baking is performed for color fixing after drying, water washing is performed, and then drying is performed to obtain a printing finished product. The pretreatment liquid is simple to prepare, convenient to use and suitable for direct injection process digital printing of all fabric high in polyester content, and the pretreatment liquid is easy to wash away after printing, so that hand feel of fabric is unaffected. Conventional heat transfer printing is replaced by the dispersive direct injection process, and transfer printing paper is not used, so that the direct injection digital printing process is environment-friendly. The pretreatment liquid can effectively prevent ink from spreading around on the polyester fabric, so that patters are ensured to be exquisite and lines are ensured to be clear after printing; color yield rate is high, printing is saturated and bright in color, and visual three-dimensional sense is high.