Abstract: The invention relates to a device for constructing a laminar body from a plurality of superimposed layers of free-flowing material, in particular particulate material, and a build platform within a working area. The layers are solidified in locally predetermined regions by the action of binders and are joined together so that at least one moulded body is formed by the solidified and joined regions of the layers. The device comprises a discharging device movable back and forth over the working area in at least one discharge direction and having at least one discharge opening from which the free-flowing material can be discharged in individual superimposed layers during the movement of the discharging device.
Type:
Grant
Filed:
November 19, 2019
Date of Patent:
March 16, 2021
Assignee:
VOXELJET AG
Inventors:
Andreas Dominik Hartmann, Dominik Schmid
Abstract: The manufacturing method includes a granulation step. The granulation step is a step of forming a plurality of granules by performing extrusion granulation on a granulation material using a granulation machine. The granulation machine includes a die. A plurality of through holes that allow the granulation material to pass therethrough are formed in the die. The plurality of through holes include first through holes having a first diameter, and second through holes having a second diameter that is smaller than the first diameter.
Abstract: The present subject matter claims a process and apparatus for forming, crystallizing and increasing the molecular weight of polymer particles which does not require re-heating the polyethylene terephthalate (PET) pellets after they are cut and crystallized in the under water cutting (UWC) section. In the existing solid state polycondensation (SSP) technologies where an UWC is used, high crystallinity of the PET pellets can occur, by cooling and re-heating the PET pellets, which results in reduced removal efficiency of by-products, such as acetaldehyde (AA) and furthermore also a reduction of the reaction rates of molecular weight increasing reactions.
Type:
Grant
Filed:
November 30, 2018
Date of Patent:
March 9, 2021
Assignee:
UOP LLC
Inventors:
Jan De Ren, Stephan Dietmer Wilhelmi, Roel Julia Julien Bauters
Abstract: Devices, systems, and methods are directed to the use of vapor phase change in binder jetting processes for forming three-dimensional objects. In general, a vapor of a first fluid may be directed to a layer of a powder spread across a build volume. The vapor may condense to reduce mobility of the particles of the powder of the layer. For example, the condensing vapor may reduce the likelihood of particle ejection from the layer and, thus, may reduce the likelihood of clogging or otherwise degrading a printhead used to jet a second fluid (e.g., a binder) to the layer. Further, or instead, the condensing vapor may increase the density of the powder in the layer which, when repeated over a plurality of layers forming a three-dimensional object, may reduce the likelihood of slumping of the part during sintering.
Type:
Grant
Filed:
September 19, 2019
Date of Patent:
March 2, 2021
Assignee:
Desktop Metal, Inc.
Inventors:
Emanuel Michael Sachs, George Hudelson, Paul A. Hoisington, Christopher Benjamin Renner, Keith Roy Vaillancourt, Edward Russell Moynihan
Abstract: A system for fabricating microparticles useful for example in managing invasive species is provided. The system provides a nozzle for atomizing liquefied droplet material which is then suspended in a cyclonic separator receiving refrigerated gas until the droplets can solidify. In this way small droplets (less than 100 ?m) can be readily fabricated in bulk without clumping and aggregating.
Type:
Grant
Filed:
December 13, 2018
Date of Patent:
March 2, 2021
Assignee:
WiSys Technology Foundation, Inc.
Inventors:
Thomas J. Zolper, Jon J. Amberg, Nathan L. Klaassen, Carter J. Rowley, Karl Chic, Brad Borchardt
Abstract: A method of manufacturing a three-dimensional shaped object in which the three-dimensional shaped object is manufactured by laminating layers includes: a layer formation step of forming layers using a material containing powder and a binder; a removal step of removing a portion of the material in a boundary region including at least one of an end portion of a shaping region of the three-dimensional shaped object in the layer and an outer portion of the shaping region adjacent to the end portion by irradiating the boundary region with a laser; and a melting and solidifying step of melting and solidifying the material after melting in the shaping region by performing irradiation with the laser.
Type:
Grant
Filed:
January 9, 2020
Date of Patent:
March 2, 2021
Assignee:
Seiko Epson Corporation
Inventors:
Takeshi Miyashita, Naoko Shima, Jun Takizawa
Abstract: A method of additive manufacturing is provided. The method of additive manufacturing includes depositing a layer of base material from which an additively manufactured part is produced. The method also includes dissolving a resin in a solvent to form a resin solution, and depositing the resin solution upon the layer of base material.
Abstract: A process for manufacturing an article comprises the steps of: applying a layer that consists of particles to a target area; allowing, in a chamber, energy to act on a selected portion of the layer, according to a cross-section of the article, so that the particles in the selected portion are bonded, and repeating the steps of applying and allowing energy to act for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form the article, at least part of the particles comprising a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of ?20° C. to ?100° C. The fusible polymer further has a complex viscosity \?*\ (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100° C. and a shear rate of 1/s) of ?10 Pas to ?1000000 Pas. Finally, the temperature inside the chamber is ?50° C.
Type:
Grant
Filed:
September 11, 2017
Date of Patent:
February 23, 2021
Assignee:
Covestro Deutschland AG
Inventors:
Dirk Achten, Thomas Büsgen, Dirk Dijkstra, Nicolas Degiorgio, Wolfgang Arndt, Levent Akbas, Roland Wagner, Peter Reichert, Jörg Büchner
Abstract: A method of additive manufacturing is provided. The method includes depositing a layer of base material from which an additively manufactured part is produced. The method also includes depositing a slurry onto the layer of base material, where the slurry includes a solvent, particles of a structural material, and a reinforcing agent.
Abstract: A method of additive manufacturing is provided. The method includes depositing a layer of polymeric material from which an additively manufactured part is produced. The method also includes depositing a slurry upon the layer of polymeric material, wherein the slurry includes a conductive material that imparts conductive properties to the layer of polymeric material.
Abstract: An improved spray drying method for production of amorphous solid dispersions with enhanced bulk density and material attributes comprising the introduction of at least one additional stream in at least one of multiple locations in a spray dryer without interfering with the spray region.
Type:
Grant
Filed:
September 23, 2019
Date of Patent:
February 16, 2021
Assignee:
Hovione Holding Limited
Inventors:
José Luis Santos, Filipe Gaspar, Marcio Temtem
Abstract: A method and an apparatus for forming a down feather sheet is described and wherein a mixture of down feathers and a binder material is fused together by injecting hot air under pressure into the mixture. A plurality of hot air injection needles are caused to penetrate into a layer of the mixture as it is conveyed along a conveyor and to release hot air at a temperature sufficient to cause the binder material to fuse together and to the down causing the down and the binder material to be trapped into the layer. The displacement of the hot air injection mechanism is synchronized to the conveying speed and the projection of the needles into the layer is adjusted to the thickness of the layer being conveyed.
Abstract: The disclosure features methods of forming composite materials, and the composite materials formed by such methods. The methods include forming a mixture that includes a binder material and a filler material, and applying a pressure of at least 10 MPa to the mixture to form the composite material, where the composite material thus formed includes less than 9% by weight of the binder material, less than 18% by volume of the binder material, or both, and has a flexural strength of at least 3 MPa.
Type:
Grant
Filed:
July 28, 2016
Date of Patent:
February 16, 2021
Assignee:
The Regents of the University of California
Abstract: There is provided a manufacturing method of a three-dimensional shaped object, the method being capable of reducing a warp deformation of the three-dimensional shaped object. The manufacturing method according to an embodiment of the present invention produces a three-dimensional shaped object by alternate repetition of a powder-layer forming and a solidified-layer forming on a base plate, wherein the forming of at least one prior solidified layer is performed under a higher temperature condition than that for the forming of a subsequent solidified layer, the at least one prior solidified layer being formed prior to the subsequent solidified layer.
Abstract: An additive manufacturing system including a build plate and at least two powder reservoirs. The at least two powder reservoirs including a first powder reservoir configured to store a first powder and deposit the first powder onto the build plate, wherein the first powder reservoir is configured to move relative to the build plate, and a second powder reservoir configured to store a second powder and deposit the second powder onto the build plate, wherein the second powder reservoir is configured to move relative to the build plate. The first powder has at least one predetermined characteristic that is different than that of the second powder.
Abstract: The present disclosure is drawn material sets, coalescent fluids, and 3-dimensional printing systems. An example material set can include an amorphous polymer powder having an average particle size from 1 micron to 300 microns, and a coalescent fluid including a viscosity reducing agent.
Type:
Grant
Filed:
May 12, 2016
Date of Patent:
January 12, 2021
Assignee:
Hewlett-Packard Development Company, L.P.
Inventors:
Kristopher J. Erickson, Howard S Tom, Lihua Zhao, Ali Emamjomeh
Abstract: A method for producing an insulation product may include providing an aqueous solution. The aqueous solution may include coarse glass fibers, glass microfibers, aerogel particles, and a binder. The coarse glass fibers, the glass microfibers, the aerogel particles, and the binder may be uniformly dispersed in the aqueous solution and may form a slurry. The method may further include removing at least a portion of water from the slurry such that the coarse glass fibers, the glass microfibers, the aerogel particles, and the binder may form a wet laid mixture. The method may also include curing the wet laid mixture to cure the binder and bond the coarse glass fibers, the glass microfibers, and the aerogel particles together to form a fiberglass reinforced aerogel composite. The fiberglass reinforced aerogel composite may include between about 50 wt. % and about 75 wt. % of the aerogel particles.
Type:
Grant
Filed:
July 30, 2020
Date of Patent:
January 12, 2021
Assignee:
Johns Manville
Inventors:
Ralph Michael Fay, Guodong Zheng, Stanislav Kukatin, Luke S Weith
Abstract: The present disclosure relates to a system and method for synthesis of condensed, nano-carbon materials to create nanoparticles. In one embodiment the system may have a source of liquid precursor, a flow control element and a shock wave generating subsystem. The flow control element is in communication with the source of the liquid precursor and creates a jet of liquid precursor. The shock wave generating subsystem drives a shock wave through at least a substantial portion of a thickness of the jet of liquid precursor to sufficiently compress the jet of liquid precursor, and to increase a pressure and a temperature of the jet of liquid precursor, to create solid state nanoparticles.
Type:
Grant
Filed:
November 28, 2018
Date of Patent:
January 5, 2021
Assignee:
Lawrence Livermore National Security, LLC
Abstract: The disclosure provides blowable insulation or filling material, and apparatus and methods for making same. The blowable insulation or filling material includes a plurality of discrete elongate floccules each formed of a plurality of fibers. The floccules include a relatively open enlarged medial portion. The floccules also include relatively condensed twisted tail portions extending from opposing ends of the medial portion. The floccules can be utilized by existing garment fill blowing machines without clogging thereof, and include a superior soft hand feel, thermal resistance and launderability. The floccules may be formed by forcing staple fibers through apertures of a rotating hollow drum to partially form the floccule structure within the drum. The partially formed floccules may be retained within the rotating drum for a dwell time to finalize the floccule structure.