399 results about "Fused deposition modeling" patented technology

A variety of support structures and build styles for use in Rapid Prototyping and Manufacturing systems are described wherein particular emphasis is given to Thermal Stereolithography, Fused Deposition Modeling, and Selective Deposition Modeling systems, and wherein a 3D modeling system is presented which uses multijet dispensing and a single material for both object and support formation.

Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a dental restoration. Three-dimensional printing comprises inkjet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound restoration can be deposited concurrently slice after slice and sintered/cured simultaneously. The amount of green body oversize is equivalent to the amount of shrinkage which occurs during sintering or curing. While the layers become hardened or at least partially hardened as each of the layers is laid down, once the desired final shaped configuration is achieved and the layering process is complete, in some applications it may be desirable that the form and its contents be heated or cured at a suitably selected temperature to further promote binding of the powder particles.

Methods, apparatus, and systems for cutting material used in fused deposition modeling systems are provided, which comprise a ribbon including one or more perforations. Material is passed through at least one perforation and movement of the ribbon cuts the material. A further embodiment comprises a disk including one or more blade structures, each forming at least one cavity. Material is passed through at least one cavity and a rotational movement of the disk cuts the material. A further embodiment comprises a slider-crank mechanism including a slider coupled to a set of parallel rails of a guide shaft. The slider moves along a length of the rails to cut the material. Yet another embodiment comprises one or more rotatable blade structures coupled to at least one rod. The rotation of the blade structures causes the blade structures to intersect and cut extruded material during each rotation.

The present invention relates to a novel process for the production of coated filaments for subsequent application as print in extrusion-based 3D printers, e.g. FDM printers (fused deposition modelling printers). The filaments are coated in a separate process outside of the printer, and can also be used in a conventional extrusion printer. The present invention further relates to the coating device for application of the coating to the filament and to a roll containing the coated filaments.

Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a shell or die used in the manufacture of a dental restoration. Three-dimensional printing includes ink-jet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound shell can be deposited concurrently slice after slice and sintered/cured simultaneously.

Disclosed is a modeling filament for use as feedstock in a fused deposition modeling liquifier, and a method for manufacturing the filament. The diameter and standard deviation of the filament are controlled to meet various tolerance requirements of jam resistance, slip resistance, model strength, liquifier overflow prevention and hysteresis-free transient response. Standard deviation of the filament diameter is matched to a filament target diameter. The resulting filament is used to form high-quality models.

A method for manufacturing parts and molds by: 1) slicing a three-dimensional CAD model of a part or mold; 2) planning a modeling path according to slicing data of the three-dimensional CAD model, whereby generating numerical control codes for modeling processing; and 3) performing fused deposition modeling of powders or wire material of metal, intermetallic compounds, ceramic and composite functional gradient materials by layer using a welding gun on a substrate layer via a numerical control gas shielded welding beam or laser beam according to a track specified by the numerical control code for each layer. A micro-roller or a micro-extrusion unit is installed at a contact area between melted and softened areas. The micro-roller or the micro-extrusion unit synchronously moves along with fused deposition area, which results in compressing and processing of the fused deposition area during the fused deposition modeling.

The invention relates to an extrusion device applied to a fused deposition modeling high speed 3D (Three Dimensional) printer, which belongs to the technical field of 3D printing. The extrusion device comprises an extrusion nozzle, a wire feeding module and a stepping motor, wherein the wire feeding module conveys a printing wire to the extrusion nozzle for extruding under the drive of the stepping motor. The wire feeding module and the extrusion nozzle form a printing travelling mechanism, the stepping motor is fixedly arranged on the high speed 3D printer, an output shaft of the stepping motor is connected to the wire feeding module via a motor driving flexible shaft, and the stepping motor does not follow up the motion of the printing travelling mechanism, so that the whole weight of the printing travelling mechanism is reduced effectively and the printing travelling mechanism can run fast, and simultaneously the extrusion precision and the even extrusion pressure of the extrusion device are ensured. The extrusion device which is applied to a fused deposition modeling high speed 3D printer and provided by the invention has a simple structure and a convenient use-pattern and is low in cost.

Additive manufacturing may be used to manufacture components of downhole tools conveyed by downhole wireline, tubing, drill pipe and/or the like. A method in accordance with one or more aspects of the disclosure uses starting materials to incorporate one or more feedthroughs, passages, channels, chambers and the like in a downhole tool structure during the formation of the structure. A CAD may be made and then converted to a STL file, and then stereo lithography, selective laser sintering, fused deposition modeling, direct metal laser sintering and/or electron beam melting may be used to form the downhole tool. Subtractive manufacturing may be performed on the downhole tool after the downhole tool is formed by additive manufacturing.

A thermoplastic material used for three-dimensional printing is disclosed. The thermoplastic material comprises inorganic powder and thermostatic resin. The weight of the inorganic powder is 60-99.9% of the total weight. The weight of the thermostatic resin is 0.1-40% of the total weight. The inorganic powder is ceramic powder or metal powder or ceramic-metal composite powder. An application method of the thermostatic material is also disclosed. The thermoplastic material and the application method provide more printing material choices for the three-dimensional printing technology, and achieve preparation of a three-dimensional structure of a ceramic material, a metal material, or ceramic-metal composites by utilization of the fused deposition modeling three-dimensional printing technology.

The invention relates to a 3D printing technology, and aims at providing a multistage-temperature-control-based fused deposition modeling (FDM) type 3D printing sprayer and a temperature control method. The multistage-temperature-control-based FDM 3D printing sprayer comprises a printing sprayer body and a heating device arranged at the outer part of the printing sprayer body, and is characterized in that a forming chamber inside the printing sprayer body is divided into four parts of a fuse feeding section, a transition section, a fusion section and a printing and extruding section; the heating device is divided into three sections which are correspondingly arranged at the outer sides of the transition section, the fusion section and the printing and extruding section of the forming chamber, and each section of the heating device comprises an electric heater and a temperature sensor which are independent and is respectively connected with a multistage temperature control module of an FDM type printing sprayer through a signal wire. The multistage-temperature-control-based FDM type 3D printing sprayer is capable of realizing the corresponding gradient control of temperatures of all sections of the printing sprayer and ensuring that an FDM printing material is always kept in a printable state, and can not cause the problems of layer collapse, damage and blockage due to overhigh or overlow temperature due to the adoption of single temperature control; and meanwhile, the blockage and the fracture of a wire of a conventional printing head are avoided, and the quality of formed products is improved.

The invention provides colored 3D (Three Dimensional) printing equipment using a fused deposition modeling method. The colored 3D printing equipment comprises three sets of feeding mechanisms for filamentary raw materials with red, yellow and blue base colors, a material mixing heater (4), a static/dynamic pipeline material mixer (5), a replaceable type printing nozzle (6), a three-dimensional motion molding platform (7) with a heating function and an equipment control system, wherein the feeding mechanisms are composed of a discharging scroll (1), a stepping type motor feeding machine (2) and a feeding guide pipe (3). The colored 3D printing equipment is characterized in that a three-primary-color principle is utilized, namely the red, yellow and blue colors are mixed according to a proper ratio to obtain nearly all colors in the natural world; thermoplastic raw material fused wires or powder with the red, yellow and blue colors can be heated and mixed according to different ratios to form different colored printing materials, and then the fused deposition modeling (FDM) method is used for carrying out 3D printing to obtain a colored product. The colored 3D printing equipment has the beneficial effects that the disadvantage that a current colored 3D printing equipment using the fused deposition modeling method only can be used for printing a single-color or double-color product is overcome; the post-period coloring and processing time of the product is shortened, the working efficiency is improved and a 3D printing application is enriched.

A three-dimensional model and its support structure are built by fused deposition modeling techniques, wherein a thermoplastic material containing silicone is used to form the support structure and/or the model. The thermoplastic material containing silicone exhibits good thermal stability, and resists build-up in the nozzle of an extrusion head or jetting head of a three-dimensional modeling apparatus. The silicone contained in a support material acts as a release agent to facilitate removal of the support structure from the model after its completion.

Disclosed is a method for making a prototype plastic injection molded part from a mold tool (10) built by fused deposition modeling. The mold too (10)l is built by depositing roads of a molten thermoplastic resin in layers in a predetermined pattern defined by computer file data representing the inverse of the desired prototype molded part, and is used in an injection molding machine without the addition of any reinforcement fill material or layers to create the prototype part. The disclosed method provides prototype plastic injection molded parts within a twenty-four hour time period.

The invention relates to a method for preparing a biodegradable polymer self-expansion type intravascular stent based on 3D printing technology.The method includes the specific steps of synthesizing polylactic acid-based shape-memory polyurethane/Fe304 nanocomposite material with good biocompatibility and biodegradability, and making the composite material into the intravascular stent through the Fused Deposition Modeling technology.In addition, in order to increase the blood vessel endothelium repair speed, sirolimus, heparin, endothelial growth factors or the like are selectively introduced to the stent surface through electrostatic spinning.A 'time'dimension is added for the shape-memory function of the base material, and combined with the 3D printing technology, a 4D forming concept is given to the stent.By means of the magnetocaloric effect of Fe304, shape recovery of the shape-memory polymer can be remotely excited, so that the intravascular stent expands automatically, balloon dilatation is not required during stent implantation, axial shortening during balloon dilatation and radial resilience during withdraw of the stent are avoided, and damage of blood vessels is reduced to a minimum level.In addition, the introduction of Fe304 solves the problem that a polymer stent has poor development.

Solid free form fabrication techniques such as fused deposition modeling and three-dimensional printing are used to create a shell used in the manufacture of a dental restoration. Three-dimensional printing includes ink-jet printing a binder into selected areas of sequentially deposited layers of powder. Each layer is created by spreading a thin layer of powder over the surface of a powder bed. Instructions for each layer may be derived directly from a CAD representation of the restoration. The area to be printed is obtained by computing the area of intersection between the desired plane and the CAD representation of the object. All the layers required for an aesthetically sound shell can be deposited concurrently slice after slice and sintered/cured simultaneously. While the layers become hardened or at least partially hardened as each of the layers is laid down, once the desired final shaped configuration is achieved and the layering process is complete, in some applications it may be desirable that the form and its contents be heated, cooled or cured at a suitably selected temperature to further promote the integrity of solid free-form structures.

The invention relates to the use of Fused Deposition Modeling to construct three-dimensional (3D) bioresorbable scaffolds from bioresorbable polymers such as polycaprolactone (PCL), or from composites of bioresorbable polymers and ceramics, such as polycaprolactone/hydroxyapatite (PCL/HA). Incorporation of a bioresorbable ceramic to produce a hybrid/composite material support provides the desired degradation and resorption kinetics. Such a composite material improves the biocompatibility and hard tissue integration and allows for increased initial flash spread of serum proteins. The basic resorption products of the composite also avoids the formation of an unfavorable environment for hard tissue cells due to a decreased pH. The scaffolds have applications in tissue engineering, e.g., in tissue engineering bone and cartilage.

The invention provides a copolyester thermoplastic material used for three-dimensional printing and preparation and application thereof. The copolyester thermoplastic material is mainly prepared from monomers of the raw materials consisting of, by mass, 35 to 48 parts of dicarboxylic acid, 30 to 43 parts of dihydric alcohol, 8 to 15 parts of acrylate and 7 to 15 parts of a spiro-compound through copolymerization in the presence of a catalyst. The invention has the following main beneficial effects: the copolyester high-molecular material prepared in the invention has good mechanical properties and machinability, is a good thermoplastic material and has a wide application scope; high temperature resistance and moisture resistance of the material are substantially improved compared with those of traditional products, and the material has good weatherability; the material has small shrinkage, adhesion among different layers is strong, a product manufactured from the material does not suffer interlayer stripping and warping, so the material is an ideal three-dimensional printing material and is especially applicable to fused deposition modeling (FDM) technology.

The invention discloses a supporting module for fused deposition modeling three-dimensional printing and a generating method of the supporting module. The supporting module is used for supporting the suspended portion of a model needing three-dimensional printing. The supporting module comprises multiple supporting units arranged at intervals to provide multiple fixation points for the suspended portion. Compared with an original supporting module, the supporting module can be more easily removed from the suspended portion of the model while the supporting performance is kept.