1041results about How to "Fast molding speed" 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 method for preparing a porous tantalum medical implant material. The method comprises the following steps of: feeding mixed tantalum power formed by mixing pure tantalum powder and a forming agent into a printing platform of a three-dimensional printer, and rolling and paving; spraying an adhesion agent by a printing head of the three-dimensional printer to adhere the mixed tantalum powder so as to form a two-dimensional plane; descending a working table 80 to 100 mu m, and processing the next layer; accumulating and forming layer by layer; removing the tantalum powder particles which are not adhered to obtain an initially formed sample; and performing aftertreatment such as degreasing, vacuum sintering, cooling and the like to obtain the porous tantalum medical implant material, wherein the volume ratio of the pure tantalum powder to the forming agent is (60-80):(20-40), and the adhesion agent is 1 mass percent alpha-cyanoacrylate adhesive. The pores of the porous tantalum medical implant material prepared by the method are completely communicated in a three-dimensional mode; the porous tantalum medical implant material prepared by the method is high in biocompatibility; and meanwhile, the mechanical property of the porous tantalum medical implant material prepared by the method is consistent with that of loading bone tissues of a human body.

The invention relates to a 3D printing composite material for mouth rehabilitation and a preparation and using method of the 3D printing composite material. The 3D printing composite material for mouth rehabilitation is characterized by comprising the following components in parts by weight: 10-40 parts of low-viscosity monomer, 10-40 parts of enhanced monomer or low polymer, 150-200 parts of ceramic powder, 5-20 parts of expansion monomer, 5-15 parts of a dispersing agent, 2-6 parts of a short-wave photoinitiator, 1-3 parts of a long-wave photoinitiator, 1-3 parts of an ultraviolet absorber and 2-5 parts of polymerizable quaternary ammonium salt anti-bacterial monomer. The 3D printing composite material for mouth rehabilitation is small in curing shrinkage, short in curing time and high in anti-bacterial property, and is suitable for manufacturing a dental prosthesis.

The invention discloses a model area change rate-based adaptive hierarchical processing method. The method comprises the following steps of importing an STL model and establishing a model topological structure; performing uniform hierarchical slicing on the model with the highest precision, obtaining a two-dimensional polygon contour layer and calculating an area of each layer of a polygon after slicing; performing derivation on the area of each layer of the polygon to obtain an area change rate of the model; comparing the calculated area change rate with a threshold according to a relationship between the area change rate of the model and the printing precision, and obtaining a printing precision distribution situation of the model in a printing direction; calculating hierarchical layer thickness data required for model printing, and performing processing by using a rounding-off method to generate adaptive hierarchical layer thickness data; and reading the hierarchical layer thickness data by a slicing engine, and performing adaptive layer thickness slicing on the model to obtain a gcode file required for printing. According to the method, while the detail characteristics of the model are ensured, the forming speed of the model is increased, and the printing time is effectively shortened.

A method for manufacturing tobacco sheet taking substrate as a carrier through a dry paper making method comprises the following steps: spraying slurry onto the right side of the substrate through a high pressure spraying method, and meanwhile carrying out negative pressure suction across a wire belt to the reverse side of the substrate; then sending the substrate into an oven and carrying out medium temperature baking and humidity discharging under the condition that the temperature of the substrate is 55 DEG to 70 DEG, and enabling hot air inside the oven to flow directional from the right surface of the substrate to the reverse surface of the substrate to carry out humidity discharging; sequentially, carrying out normal temperature humidity discharging treatment; setting medium temperature baking and humidity discharging time and the normal temperature baking and humidity discharging alternatively; and repeating the steps on the reverse side of the substrate, namely a tobacco sheet is prepared. The substrate is prepared by that scattered material is evenly paved and absorbed onto a formation fabric for dry paper making to form a fiber thin layer under the vacuumpumping of a vacuum air pumping device under the formation fabric, and carrying out antistatic-electricity treatment; and spraying adhesion agent onto a fiber thin layer, under the combination of mist spraying and vacuum take-off on sprayed back surface; and finally carrying out drying.

The invention belongs to the producing area, which uses modern shadow casting technique and computer image processing technique to process the illumination solidification modeling on the surface of liquid photosensitive resin to form the three-dimensional solid quickly. The invention processes the sectional mould data of three-dimensional solid via the computer fast shaping processing technique to generate the digital grid image data which can be directly used in projection, to be transformed into digital optical signal via the digital image projector, and adjusted by different time and space patterns to be irradiated over the surface of photosensitive resin to solidify it.

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 belongs to the field of novel 3D printing materials and in particular belongs to the field of photosensitive resin. The photosensitive resin is prepared from the following components in percentage by weight: 5-80% of acrylic ester, 5-80% of epoxy resin, 0.5-8% of a radical initiator, 0.5-5% of a cationic initiator, 5-50% of a diluent and 0.5-5% of gas phase silicon dioxide. Flexural modulus and tensile modulus of the photosensitive resin reach over 2000Mpa; the photosensitive resin is high in capability of resisting bending deformation stress in an elastic limit, high in strength, low in possibility of deforming and high in mechanical strength; the service life is greatly prolonged; the volume shrinkage rate is about 1.0%; the ultralow volume shrinkage rate is achieved; the industrial use requirement can be met.

The invention discloses a micro-nano three-dimensional printing nozzle device. The three-dimensional printing nozzle device comprises a controller, a storage bin and a nozzle main body part. The nozzle main body part comprises three groups of spray orifice arrays with different diameters, and the spray orifice arrays are respectively an A group spray orifice array, a B group spray orifice array and a C group spray orifice array. The three groups of the spray orifice arrays with the different diameters are connected to three nozzles respectively. The controller comprises a central processing unit, a controller for the first spray orifice array, a controller for the second spray orifice array, a controller for the third spray orifice array and a driving power source. The central processing unit controls and switches working of the controller for the first spray orifice array, the controller for the second spray orifice array and the controller for the third spray orifice array by outputting different pulse signals. The controller for the first spray orifice array, the controller for the second spray orifice array and the controller for the third spray orifice array respectively control a working state of each spray orifice in each of the three groups of the spray orifice arrays with the different diameters. According to the three-dimensional printing nozzle device, rapid rough machining is performed by utilization of the work of the large-diameter spray orifices and slow finish machining is performed by utilization of small-diameter spray orifices, thus achieving macro-micro composited three-dimensional rapid moulding.

The invention belongs to the field of a high molecular material, and particularly relates to photo-cured elastic photosensitive resin with wavelength being 405 nanometers for 3D printing of digital light processing (DLP). The elastic photosensitive resin comprises the following raw materials based on parts by weight: 10-50 parts of elastic acrylate, 30-70 parts of active diluents, 1-10 parts of photoinitiator, 0.01-0.05 part of flatting agent, 0.01-0.05 part of dispersning agent and 0.01-0.05 part of polymerization inhibitor. The elastic photosensitive resin can be directly used for 3D printing of DLP or can be mixed with other existing photosensitive resin, a product with a complicated structure and certain elasticity can be printed, meanwhile, the elastic photosensitive resin has the characteristics of small volatile odor, rapid formation speed, small product shrinkage rate, high formation accuracy and the like.

The invention provides a planar stereo lithography apparatus and method. The apparatus comprises an ultraviolet light digital projector, a resin storage tank and a workbench, wherein the bottom of the resin storage tank is prepared from glass which allows ultraviolet light to be transmitted, and a gap used for filling resin liquid is arranged between the lower end face of the workbench and the bottom of the resin storage tank. The resin liquid is injected into the gap located between the resin storage tank and the workbench; the contour of an ultraviolet light layer of an entity part generated by using a digital projection method forms an image on the resin liquid through a base plate of the resin storage tank so as to obtain a solidified layer with the contour of a corresponding layer; the workbench is lifted a layer higher, then the resin liquid is injected into a gap between the lower end face of the solidified layer and the resin storage tank, and exposure and solidification of a next layer are carried out. According to the invention, the problem of buckling deformation after stereo lithography is overcome, and the advantages of high molding precision, a fast molding speed, a simple process and low cost are obtained.

The invention relates to a device and a method for automatically stacking and packaging bricks, in particular to bricks for building and a series of automatic machinery. The device comprises an accepting device, an aligning device, a line conveying stacking device group, a hanging clip hook device group, a conveying belt, and the like. The device can automatically stack pre-determined number of bricks with required volume through the one-by-one conveying operation of the conveying belt and the corresponding one-by-one capturing shifting operation of the hanging clip hook devices of the hanging clip hook device group; and with cooperation of a packaging machine, the device can perform automatic packaging operation; and two long rectangular grooves are reserved on the second layer of bricks and are used for inserting two inserted links of a fork lift truck. The device stacks and packages the bricks according to the required number and volume layer by layer by using automatic mechanical equipment and has the advantages of reducing labor waste, increasing the forming speed of brick stacking and packaging and increasing the use value in industry.

The invention discloses a microarray die-free forming device based on a surface acoustic wave and a forming method. The technical scheme is that a square piezoelectric matrix plate is provided with two pairs of interdigital transducers in a photoetching manner, each pair of interdigital transducers is symmetrically arranged with a center shaft of the square piezoelectric matrix plate as an axis, a square glass fluid tank is placed in the middle of the piezoelectric matrix plate and adhered to the piezoelectric matrix plate, and a formed liquid-state material is accommodated in the glass fluid tank. An ultrasonic surface wave is transmitted in the piezoelectric matrix plate, the energy of the ultrasonic surface wave is leaked into the formed liquid-state material within a certain angles to form a sound field, a signal generator and a power amplifier are adjusted to change amplitude values, frequency and phases of the ultrasonic surface wave, so that a required stable microarray structure is formed on the surface of the formed liquid-state material, and the microarray structure is cured and formed through ultraviolet irradiation. The microarray die-free forming device based on the surface acoustic wave and the forming method have the advantages that the sound field is adopted to manufacture the surface microarray structure through rapid forming in the liquid-state material, the die is not required, the manufacturing process is simple, the equipment requirement is low, the operation is simple and convenient, the production cost is low, and the material usage rate and the production efficiency are high.

The invention discloses a method for making a porous ceramic support body. The method comprises the following steps that: (1) a step of ceramic powder pretreatment, during which, ceramic powder and a pore-forming material are evenly ground with the weight of the pore-forming material is 5 to 30 percent of that of the ceramic powder; (2) a step of slurry preparing, during which, a forming agent is dissolved in a solvent and then is added in the pretreated ceramic powder so as to be ground evenly; the forming agent is polysulfone or polyethersulfone and the solvent can dissolve the forming agent; moreover, the weight percent of the forming agent, the solvent and the pretreated ceramic powder is 1 to 15 percent : 2 to 30 percent : 55 to 97 percent; (3) a step of making green compact, during which, slurry is made into green compact and then is dipped in pure water so as to carry out forming; and (4) a step of high-temperature sintering. The method has high rate of finished products and quick making speed and can be used in the solid oxide fuel cell field.

The invention discloses a molding binding device of firecrackers tube cake, comprising a vertical feeding system, a loading molding system, a binding system and a control system. The beneficial effects of the molding binding device of firecrackers tube cake are lie in that(1) the arrangement, combination molding and binding of the firecrackers tube cake are completed in full-automation, the molding speed is fast, the binding is tight and the shape of the firecrackers tube cake is regular and beautiful; more than 300 firecrackers tube cakes can be finished per hour, which saves the human resources significantly, improves the work efficiency and solves the problem of labor shortage; (2) each part of the molding binding device is modular designed and installed, the size can be adjusted in accordance with the product, and the operation is convenient and the maintenance is fast; the abrasion of the contact site is low by employing a pneumatic roller structure, so that the device can be used for a long time without worrying about the precision to be effected.

The invention discloses a continuous sinking-mode efficient 3D printing method and equipment. The continuous sinking-mode efficient 3D printing method comprises the following steps: by utilizing the principle that after oxygen is applied to the liquid level of resin, oxygen molecules can form an oxygen molecule concentration equilibrium point in the resin and projecting or focusing a light source at the equilibrium point and a region below the equilibrium point, curing of photosensitive resin is initiated, a printing table adhered to a cured product is driven by a motor to continuously move downwards, meanwhile, the photosensitive resin supplements the cured region with the equilibrium point, and changed light of the light source is projected onto the equilibrium point to carry out continuous curing under the control of a program, so that 3D printing is finished. In the printing process, the concentration gradient of the oxygen molecules which permeate into the resin can be controlled by regulating an input parameter of applied oxygen. The continuous sinking-mode efficient 3D printing method and the equipment can dramatically increase the forming speed of the traditional 3D printing, are suitable for large 3D printing products and are simple in mechanism, convenient to operate, high in accuracy of the printed products and excellent in performance.