28 results about "Stereolithographies" patented technology

Provided is an ultraviolet-curable silicone composition for stereolithography comprising: (A) organopolysiloxane having two groups indicated by formula (1) in a molecule (in the formula, R1 represents a monovalent hydrocarbon group, R2 represents an oxygen atom or an alkylene group, and R3 represents an acryloyloxyalkyl group, a methacryloyloxyalkyl group, an acryloyloxyalkyloxy group, a methacryloyloxyalkyloxy group, a (acryloyloxyalkyl) dimethylsilyloxy group, or a (methacryloyloxyalkyl) dimethylsilyloxy group, where p represents a number satisfying 0 ≤ p ≤ 10, and a represents a number satisfying 1 ≤ a ≤ 3); (B) hydrophobic silica particles having an average particle diameter of 10-1,000 nm and a degree of hydrophobicity of 60% or more by a methanol titration method; and (C) a photopolymerization initiator.

The present disclosure provides a device manufacturing process comprising designing a mold for stereolithography resin printing, wherein the mold is configured to minimize distortion from pyrolysis and sintering, printing the mold from resin using stereolithography, pyrolyzing the mold to convert resin into carbon structure, filling the carbon structure with ceramic slurry, drying the ceramic slurry within the carbon structure, and thermally processing the carbon structure and ceramic slurry to decompose the carbon structure and sinter the ceramic slurry into consolidated ceramic part. The ceramic slurry may comprise hydroxyapatite or yttria-stabilized zirconia particles. The mold design may limit beam thickness and wall thickness to 0.6mm and account for isotropic shrinkage of approximately 50% during pyrolysis. Thermal processing may involve sintering at 1200°C for hydroxyapatite or 1450°C for yttria-stabilized zirconia to produce ceramic scaffolds with sub-millimetric channels and intricate lattice structures for biomedical applications.

The present disclosure provides systems and methods for printing three-dimensional (3D) objects. In an aspect, the present disclosure provides a method of determining a complexity of a portion of a 3D object and applying adaptive smoothing during the printing of the portion of the 3D object.

A computer-implemented method includes generating a digital simulation model of an object, identifying portions of the object for physical prototyping based on confidence scores derived from the digital simulation model and creating a stereolithography (STL) model for the portions. Three-dimensional (3D) printing of the portions is performed based on the STL model. Physical testing is performed on 3D printed portions, and the digital simulation model is updated based on results of the physical testing.

The invention relates to a deformable absorbent substrate for a packaging and / or application assembly for a cosmetic product, having cells defined by ridges. The ridges may be created in particular by means of additive manufacturing, in particular by selective laser sintering, selective laser fusion, stereolithography, or fused filament fabrication.

The objective of the present disclosure is to enhance resolution in at least a propagation direction of promotion light in a stereolithographic technique using a liquid phase polymerization method. A stereolithographic method according to the present disclosure includes: a region defining step (S11) of defining a first region to be irradiated with promotion light on a molding surface set inside a photocurable resin and a second region to be irradiated with inhibition light; and an irradiation step (S13) of irradiating the first region with the promotion light having a wavelength λ1 which is n times (n is an integer of 2 or more) greater than a first absorption wavelength included in the absorption band of the polymerization initiator, and irradiating the second region with the inhibition light having a wavelength λ2 which is a second absorption wavelength included in the absorption band of the polymerization inhibitor. In the irradiation step, the polymerization initiator is activated by n-photon absorption of photons of the promotion light.

The invention discloses a nozzle blowing and filling integrated multi-material supply mechanism and method for ceramic photocuring additive equipment. The nozzle blowing and filling integrated multi-material supply mechanism and method are used for solving the problems that in a stereolithography SLA / spray deposition DIW composite multi-material printing process, the supply efficiency of multiple materials is low, and the forming speed is low. Comprising a linear module, an installation assembly, a fine adjustment assembly, a telescopic assembly, a material spraying nozzle and an air spraying nozzle, the linear module is fixed to a guide rail of the printer, the fine adjustment assembly is connected with the linear module through the installation assembly and moves up and down along the linear module, the fine adjustment assembly has vertical telescopic performance, and the material spraying nozzle is fixed to a movable part of the fine adjustment assembly; the air injection nozzle is connected with the material injection nozzle through the telescopic assembly, the telescopic assembly has transverse flexibility, and the distance between the air injection nozzle and the material injection nozzle is adjusted through the telescopic assembly. The material spraying nozzles are transversely arranged side by side, space cooperative movement is achieved, the printing path and the material extrusion amount are adjusted in real time, and the layer-by-layer progressive filling effect is achieved through side-by-side printing.

A curable composition for stereolithography, comprising a photopolymerizable component and a photopolymerization initiator, wherein a cured product of the curable composition has a minimum value of a storage elastic modulus, in a range of from 25° C. to 300° C., of not greater than 1.20×107 Pa.

In additive manufacturing operations, powders used in stereolithographic processes need to be precisely spread out in a uniform fashion at every pass of the stereolithographic process to ensure predictability in powder surface morphology. Typically, this is difficult to achieve with conventional powders because often these powders suffer from poor flowability, which may further deteriorate over time, and impairs the efficiency of the stereolithographic processes. The present disclosure describes additive manufacturing powders having improved physical characteristics such as flowability and tap density, which are less sensitive or insensitive to ambient humidity. For example, there is described a powder that includes spherical particles having a particle size distribution of less than 1000 micrometers and having a measurable flowability as determined in accordance with ASTM B213 at 75% relative humidity.

The invention relates to a component (1) of an eyeglass frame and a method for additive manufacturing of such a component (1) by means of stereolithography, wherein the component (1) comprises at least one eyeglass frame (3) having an inner edge (10), wherein an inner support structure (12) is manufactured together with the eyeglass frame (3) in order to support the eyeglass frame (3), wherein the inner support structure (12) of the manufactured component (1) is connected to the inner edge (10) at at least two opposing points (14) in such a way that these points (14) are supported relative to one another, wherein a surface (5) of the component (1) has at least one connection region (7), wherein the connection region (7) is concealed in the position of use of the finished eyeglass frame, wherein an outer support structure (9) is provided, which is manufactured together with the component (1), wherein a connection between the outer support structure (9) and the component (1) is established in the connection region (7), wherein the manufacturing of the inner support structure (12) is started as soon as the connection between the outer support structure (9) and the component (1) has been established.

The invention relates to a stereolithography method comprising the steps of: containing a photo-hardening suspension (100) with filler particles (103) in a vat (105); setting the photo-hardening suspension to a layer thickness smaller than the diameter of the filler particles (103) with respect to the bottom (109) of the vat (105) by means of a structure platform (107); and selectively hardening the set layer thickness of the suspension by means of light.

The present invention relates to a plate denture production kit for stereolithography including a curable composition for a denture base (I) containing a (meth)acrylic based polymerizable monomer component (A) containing a (meth)acrylic based polymerizable monomer (m) as a major monomer, and a photopolymerization initiator, and a composition for a prosthetic tooth (II) containing a (meth)acrylic based polymerizable monomer component (B) containing the same (meth)acrylic based polymerizable monomer (m) as contained in the curable composition for a denture base (I), having a content of the (meth)acrylic based polymerizable monomer (m) of 20% by mass or more based on 100% by mass of the (meth)acrylic based polymerizable monomer component (B), and a method of producing a plate denture.

A stereolithography method is provided for the production of a three-dimensional object through the superimposition of layers. The method includes: application of a base substance to a supporting surface belonging to a first laminar element and to a second laminar element; selective irradiation of a layer with a predefined thickness of the base substance in contact with the supporting surface in such a way as to obtain a solidified layer; separation of the solidified layer from the supporting surface through a movement intended to move them away from each other. The application of the base substance is carried out by depositing a single layer with thickness at least corresponding to the predefined thickness so that it comes into contact with the second laminar element at least in the areas corresponding to the volume of the three-dimensional object to be obtained.

Described are 3D printing platforms comprising stereolithographic 3D printing devices utilizing a static optical assembly and procedural modeling applications representing 3D scenes as signed distance function. Described are also structures such as bioreactors that can be printed using such platforms, as well as characteristics and used thereof.

A stereolithography device (1A) comprises: a first light source (101) that outputs first light (L1); a second light source (102) that outputs second light (L2); a spatial light modulator (DMD103) that is controlled to have a first modulation pattern in a first state and to have a second modulation pattern in a second state; an optical path changing optical system (110) that changes optical paths of the first light (L1) and the second light (L2) such that the first light (L1) is incident on the spatial light modulator (DMD103) in the first state and the second light (L2) is incident on the spatial light modulator (DMD103) in the second state; and an irradiation optical system (imaging lens 104, aperture stop 105, beam splitter 106, and first objective lens 107) that irradiates a molding surface (S) with the first light (L1) in a first irradiation pattern in the first state and irradiates the molding surface (S) with the second light (L2) in a second irradiation pattern in the second state.

A method for making a stereolithographic object, including: releasing at least one fastener immobilizing at least one joint between a fabrication platform and bracket to which the fabrication platform is pivotably attached, such that the fabrication platform is pivotable with respect to the bracket; unreleasing the at least one fastener; disposing a radiation hardenable material into a vessel for receiving a radiation hardenable material and having an actinic radiation transparent portion transparent to the actinic radiation; operating an actinic radiation source to generate the actinic radiation; illuminating with the actinic radiation the radiation hardenable material through the actinic radiation transparent portion, the actinic radiation transparent portion being intermediate the stereolithographic radiation source and the fabrication platform; and translating the bracket towards the vessel and away from the vessel.

Provided is a UV-curable silicone composition for stereolithography, the UV-curable silicone composition containing: (A) an organopolysiloxane having, per molecule, two or more radically polymerizable group-containing groups each bonded to a silicon atom via an oxygen atom directly bonded to the silicon atom (excluding those containing a heteroatom other than an oxygen atom); (B) hydrophobic silica particles having an average particle size of 10-1,000 nm and having a hydrophobicity of 60% or more as measured by a methanol titration method; and (C) a photopolymerization initiator, wherein when the composition is irradiated with ultraviolet light having a wavelength of 405 nm at 25°C at a dose of 8,000 mJ / cm2, and then cured for 24 hours in an environment of 85°C and 85% RH to obtain a cured product having a thickness of 2.0 mm, the cured product has a tensile strength of 4.5 MPa or more and an elongation at break of 300% or more.

A method for forming a patient-specific implant (PSI) part for application to a resected body part to form a reconstructed part involves utilizing a StereoLithography (STL) model of the reconstructed part with trace lines and the location of screw holes for screws to fasten the PSI to the resected body part in forming the reconstructed part. The trace lines are processed using cubic-spline data interpolation and smoothing, followed by the generation and transformation of rectangles to create a skeleton that forms the implant's surface model. The screw holes are added to the model after the trace lines are processed. Next, the model is converted into an STL file, which is made available for forming implant material into the PSI.

The present application belongs to the technical field of polymer and luminescent material, and more particularly relates to a kind of stereolithography long-life room temperature phosphorescence material and its preparation and application.Long-life room temperature phosphorescence material includes: polypropylene fumarate, hyperbranched polyester acrylate and phosphorescent molecule LAD;The number average molecular weight of polypropylene fumarate is 2800-4000 g / mol;With the total amount of polypropylene fumarate and hyperbranched polyester acrylate parts, the mass fraction of polypropylene fumarate is ≥58%;The mass fraction of phosphorescent molecule is 0.08-0.15%.The present application significantly improves the phosphorescent lifetime of LAD by matching LAD with polypropylene fumarate, hyperbranched polyester acrylate resin system.

The application provides a kind of based on stereolithography ultra-wide bandwidth beam medium resonant antenna, belong to antenna design field, including double-layer PCB structure and medium resonator, wherein, double-layer PCB structure includes first upper surface copper clad (4), second upper surface copper clad (5), lower surface copper clad (3), medium substrate (2);Medium resonator structure includes ceramic medium block (1), first slot (6), second slot (7);First, second upper surface copper clad is located on the upper surface of medium substrate, and first, second upper surface copper clad is microstrip line;Lower surface copper clad is the ground plane corresponding to microstrip line, and ground plane has gap with medium resonator;Ceramic medium block has first and second slot, and two slots are equal in size, wherein, first slot is located above medium resonator, and second slot is located below medium resonator.The application can realize complex structure of medium material conformal coating by stereolithography additive manufacturing technology, and realize the impedance bandwidth of ultra-wide band.

The present invention provides an adhesive composition for stereolithographic articles and non-stereolithographic articles, possessing excellent adhesive properties to both objects fabricated by stereolithography and molded articles made by methods other than stereolithography. The present invention relates to an adhesive composition for stereolithographic articles and non-stereolithographic articles, comprising: a polyfunctional (meth)acrylic polymerizable monomer (A); and an organic solvent (B) having a normal boiling point of 120°C or less, and a viscosity at 25°C of 10 mPa·s or less, wherein the polyfunctional (meth)acrylic polymerizable monomer (A) comprises two or more polymerizable groups per molecule, and at least one selected from the group consisting of a urethane bond, an aromatic skeleton, and an amide bond, and the polymerizable groups of the polyfunctional (meth)acrylic polymerizable monomer (A) are (meth)acryloxy groups or (meth)acrylamide groups.

A computer-implemented method includes generating a digital simulation model of an object, identifying portions of the object for physical prototyping based on confidence scores derived from the digital simulation model and creating a stereolithography (STL) model for the portions. Three-dimensional (3D) printing of the portions is performed based on the STL model. Physical testing is performed on 3D printed portions, and the digital simulation model is updated based on results of the physical testing.

Stereolithography system comprising a mounting block (12) for receiving linear drives (3, 4) movable in the y- and x-axes as a crossed arrangement and for receiving a build vessel (1) with an integrated build platform (2) movable in the z-axis, wherein the crossed arrangement of the linear drives for the y-axis (3) and for the x-axis (4) is arranged vertically above the build vessel (2), wherein a laser source (6) is directed with the beam exiting vertically downwards in the direction of the resin-filled build vessel (1) and is attached to the linear drive for the x-axis (4) via a fastening means (5), wherein a dynamically adjustable focusing optic is integrated on the laser source (6), characterized in that the dynamically adjustable focusing optic is a motor-driven telescope or a driven objective turret.where the dynamically adjustable focusing optics allow the line width of the laser beam to be dynamically adjusted during the construction process while simultaneously modulating the laser power.

A method of separating excess resin from at least one object, includes: (a) stereolithographically producing at least one object on at least one carrier platform, each carrier platform having a planar build surface to which at least one object is connected, each object carrying excess resin on a surface thereof; then (b) mounting each carrier platform to a rotor; (c) centrifugally separating excess resin from each object by spinning the rotor with each carrier platform connected thereto while each object remains connected to each carrier platform; and then (d) removing each carrier platform from the rotor with each object thereon, with excess resin separated therefrom.

A stereolithography apparatus (1) for generating a three-dimensional object (2) from a photo-curable substance (3), comprising a vat (4) for storing the photo-curable substance (3), and a platform (5) for supporting the three-dimensional object (2), wherein the platform (5) is movable relative to the vat (4), an optical unit (6) for sequentially projecting layer images towards the photo-curable substance (3) in order to harden the photo-curable substance (3) deposited between the three-dimensional object (2) and the bottom of the vat (4), further comprising an oscillation unit (7) adapted to horizontally oscillate the vat (4) with a substantially constant amplitude simultaneously with the projection of the layer images in order to prevent the three-dimensional object (2) from adhering to the bottom of the vat (4).

To provide a model material clear composition for material jet stereolithography that can give a model material having increased storage stability and reduced yellowing of a polymerizable component and showing a clear and crystal-like color.SOLUTION: A model material clear composition comprises an ethylenically unsaturated monomer (A1) having at least one group selected from a group consisting of a dicyclopentenyl group and a dicyclopentanyl group, at least one photopolymerization initiator selected from a group consisting of an acylphosphine oxide-based photopolymerization initiator and an α-hydroxyacetophenone-based photopolymerization initiator, a hindered amine-based polymerization inhibitor, and a phenolic antioxidant, and contents (mass%) of the initiator, the polymerization inhibitor, and the antioxidant satisfy Formula (1): content of photopolymerization initiator≥content of polymerization inhibitor≥content of oxidation inhibitor, and Formula (2): 1≤√content of photopolymerization initiator / √[(content of polymerization inhibitor×10)2+(content of antioxidant×100)2]≤800.SELECTED DRAWING: None