Patents by Inventor Jialin Shen

Jialin Shen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7722802
    Abstract: The invention relates a powder material consisting of coated particles for a powder-based rapid generative prototyping methods, in particular by compressing a 3D binder. Said powder material consists of individual plastic, metal and/or ceramic particles and/or granules. A coating essentially consists of an adhesive agent which can be activated by a liquid binder, light or laser light, and of sinterable or glass-forming fine-grained material. Said invention also relates to a method for compressing 3D binder with the aid of an organic solvent having a water content less than 45% and to sintered bodies, in particular for moulding or precision mechanical engineering, which are fixed to each other by sintering or glass formation from a fine grained material.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: May 25, 2010
    Assignee: Daimler AG
    Inventors: Rolf Pfeifer, Jialin Shen
  • Patent number: 7611756
    Abstract: The invention relates to a method for coating particles of a plastic, metal and/or ceramic powder material for producing an adhesive-containing coating material, in particular for producing appropriate particles by compressing a 3D binder. Said coating is applied to fluidized particles in a gaseous phase by means of a coating solution, at least the particles and/or coated particles being exposed to ionized particles. A method for producing bodies or sintered bodies from organic liquid binders by compressing the 3D binder and the use thereof are also disclosed.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: November 3, 2009
    Assignee: Daimler AG
    Inventors: Rolf Pfeifer, Jialin Shen
  • Patent number: 7533713
    Abstract: Casting mold for metal casting, in particular precision casting of fine parts of steel, in which at least the main part of the casting mold is made of porous ceramic with a high thermal coefficient of expansion which corresponds to the metal, and produced by generative rapid prototyping process, as well as generative rapid prototyping processes and coated powders particularly suitable therefore, as well as uses of the casting mold for tools and their components, in particular of steel.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: May 19, 2009
    Assignee: Daimler AG
    Inventors: Rolf Pfeifer, Jialin Shen
  • Patent number: 7431987
    Abstract: The invention relates to particles for producing a three-dimensional object by using layer-building methods (powder-based generative rapid prototyping methods), to methods for producing a three-dimensional object therefrom, and to an object that can be produced by using the particles or the methods. The aim of the invention is to improve the precision of production methods of this type by preventing the tendency of the particles used to agglomerate. To this end, a surfactant layer is applied, whereby the nonpolar groups of the surfactants are oriented toward the particle surface thus forming a hydrophobic surface having a low tendency to agglomerate.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: October 7, 2008
    Assignee: Daimler AG
    Inventors: Rolf Pfeifer, Jialin Shen
  • Patent number: 7402330
    Abstract: The invention relates to a granular material for 3D binder printing, said granular material consisting of particles provided with an externally non-polar surface layer (2). The invention also relates to a method for producing a granular material for 3D binder printing, whereby a surface layer (2) having a non-polar outer side is applied to initial particles (1), and to a method for producing an object consisting of the inventive granular material, according to which a layer of the inventive granular material is applied to a base, and pre-determined regions (3) of said layer are moistened with a binding fluid, said binding fluid being selected from fluids in which a surface layer of the particles of the granular material is soluble. The invention further realties to objects consisting of interconnected particles of the inventive granular material. The invention enables a very precise printing process.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: July 22, 2008
    Assignee: Daimler AG
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20080067722
    Abstract: The invention concerns a process and a device for the rapid technology for producing a three-dimensional object from a solifiable material, wherein a supplemental tempering occurs within the construction space.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 20, 2008
    Applicant: DaimlerChrysler AG
    Inventor: Jialin Shen
  • Patent number: 7284589
    Abstract: Sacrificial lost casting cores of green or fired ceramic, which include at least one tension spring as a metallic reinforcing element, wherein at least one end of this reinforcing element lies near one of the surfaces of the casting core or extends therethrough, and wherein the melting point of all metallic reinforcing elements lie above the melting point of the casting metal, as well as processes for production of such casting cores, including the steps of preparing a principal mold, seating therein at least one reinforcing element, filling the principal mold with ceramic slip, drying the slip for formation of a green ceramic and releasing the casting core from the principal mold. The principal mold is preferably lined with a flexible internal mold or liner. The reinforcing element in the form a tension spring can be used following casting for breaking up the ceramic casting core.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: October 23, 2007
    Assignee: DaimlerChrysler AG
    Inventors: Rolf Pfeifer, Ralf Lebbing, Jialin Shen
  • Patent number: 7285234
    Abstract: Process for layer-wise production of a three dimensional body (generative rapid prototyping), in particular by 3D binder printer, including a multiple succession of the steps of depositing a powder particle layer, activating in defined areas an adhesive present on the powder particles and/or in the powder particle coating, as well as adhering the powder particles to each other and to the layer thereunder, wherein the powder particle layer is electrically discharged by ionized particles and brushed flat by means of an electrically insulated blade prior to activation of the adhesive material, and the invention further concerns a device adapted for application of thin powder particle layers, including at least one ionizing device.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: October 23, 2007
    Assignee: DaimlerChrysler AG
    Inventors: Rolf Pfeifer, Jialin Shen, Didier von Zeppelin
  • Publication number: 20070057398
    Abstract: Generative processes for production of a three dimensional object comprised of particles are increasingly employed in the manufacture of casting molds and casting cores. Therein the casting mold is constituted of sand particles, which are joined using a binder material. The task of the present invention is comprised therein, of providing an alternative layer building-up process for production of a three dimensional object, which achieves sufficient casting stability, without suffering intolerable quality degradation due to evolution of off-gases from binder material during casting. This task is solved by a process employing particles, which are comprised of a mono- or polyvalent, water and/or alcohol soluble metals salt.
    Type: Application
    Filed: April 28, 2006
    Publication date: March 15, 2007
    Inventors: Jialin Shen, Zheng Xu
  • Publication number: 20060251535
    Abstract: The invention relates a powder material consisting of coated particles for a powder-based rapid generative prototyping methods, in particular by compressing a 3D binder. Said powder material consists of individual plastic, metal and/or ceramic particles and/or granules. A coating essentially consists of an adhesive agent which can be activated by a liquid binder, light or laser light, and of sinterable or glass-forming fine-grained material. Said invention also relates to a method for compressing 3D binder with the aid of an organic solvent having a water content less than 45% and to sintered bodies, in particular for moulding or precision mechanical engineering, which are fixed to each other by sintering or glass formation from a fine grained material.
    Type: Application
    Filed: February 13, 2004
    Publication date: November 9, 2006
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20060251826
    Abstract: The invention relates to a method for coating particles of a plastic, metal and/or ceramic powder material for producing an adhesive-containing coating material, in particular for producing appropriate particles by compressing a 3D binder. Said coating is applied to fluidised particles in a gaseous phase by means of a coating solution, at least the particles and/or coated particles being exposed to ionised particles. A method for producing bodies or sintered bodies from organic liquid binders by compressing the 3D binder and the use thereof are also disclosed.
    Type: Application
    Filed: February 13, 2004
    Publication date: November 9, 2006
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20060249484
    Abstract: The invention relates to a process for joining a hollow profiled section (1) to a component (2) of a vehicle which bears flat against it by means of soldering, with a solder (4) being introduced between the hollow profiled section (1) and the component (2) and then being liquefied by the introduction of energy and, as it solidifies, producing a fixed join between the hollow profiled section (1) and the component (2).
    Type: Application
    Filed: April 22, 2004
    Publication date: November 9, 2006
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20060159896
    Abstract: In the rapid prototyping method of selective laser sintering, temperature gradients occur inside and between individual layers, leading to component deformation which is intolerable at least for high-quality components. The air of the invention is to provide a method for selective laser sintering, whereby the temperature inside the built-up particle cake is as homogeneous as possible. To this end, particles containing at least one material having a maximum softening temperature of approximately 70° C. are used.
    Type: Application
    Filed: June 16, 2003
    Publication date: July 20, 2006
    Inventors: Rolf Pfeifer, Jialin Shen
  • Patent number: 7049363
    Abstract: A material system for use in a 3D-printing, which exhibits a higher form stability. The material system contains binder and solvent as well as optional filler materials. The binder is soluble in the solvent, as well as two complementary polyelectrolytes, and/or an initiator for a cross linking reaction of the binder. The advantage of such a mixed material system is comprised in the essentially higher binder force between the individual particles. This enhanced binder force results either from the acid-base linkages, which form between the complementary polyelectrolytes, or from the supplemental networking initiated by the initiators, or from both. Substantially higher binding forces between the individual particles means at the same time a substantially higher shape stability of the 3D-printing product.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: May 23, 2006
    Assignee: DaimlerChyrsler AG
    Inventor: Jialin Shen
  • Publication number: 20060103054
    Abstract: The invention relates to particles for producing a three-dimensional object by using layer-building methods (powder-based generative rapid prototyping methods), to methods for producing a three-dimensional object therefrom, and to an object that can be produced by using the particles or the methods. The aim of the invention is to improve the precision of production methods of this type by preventing the tendency of the particles used to agglomerate. To this end, a surfactant layer is applied, whereby the nonpolar groups of the surfactants are oriented toward the particle surface thus forming a hydrophobic surface having a low tendency to agglomerate.
    Type: Application
    Filed: June 16, 2003
    Publication date: May 18, 2006
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20050276976
    Abstract: The invention relates to a granular material for 3D binder printing, said granular material consisting of particles provided with an externally non-polar surface layer (2). The invention also relates to a method for producing a granular material for 3D binder printing, whereby a surface layer (2) having a non-polar outer side is applied to initial particles (1), and to a method for producing an object consisting of the inventive granular material, according to which a layer of the inventive granular material is applied to a base, and pre-determined regions (3) of said layer are moistened with a binding fluid, said binding fluid being selected from fluids in which a surface layer of the particles of the granular material is soluble. The invention further realties to objects consisting of interconnected particles of the inventive granular material. The invention enables a very precise printing process.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 15, 2005
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20050212163
    Abstract: Components build up of layers can be produced by means of the so-called three dimensional printing process from plaster or cement powder. It is the task of the present invention to provide another component build up in layers and a process for production thereof, which component exhibits at least comparable strength and at most the same manufacturing cost. The task is solved thereby, that the component is a reaction product of a particulate material and an aqueous liquid, wherein the component includes a number of layers of the reaction product, and wherein the particulate material contains plaster-free cement.
    Type: Application
    Filed: March 24, 2005
    Publication date: September 29, 2005
    Inventors: Holger Bausinger, Michael Nitz, Jialin Shen, Didier Zeppelin
  • Publication number: 20050199365
    Abstract: Sacrificial lost casting cores of green or fired ceramic, which include at least one tension spring as a metallic reinforcing element, wherein at least one end of this reinforcing element lies near one of the surfaces of the casting core or extends therethrough, and wherein the melting point of all metallic reinforcing elements lie above the melting point of the casting metal, as well as processes for production of such casting cores, including the steps of preparing a principal mold, seating therein at least one reinforcing element, filling the principal mold with ceramic slip, drying the slip for formation of a green ceramic and releasing the casting core from the principal mold. The principal mold is preferably lined with a flexible internal mold or liner. The reinforcing element in the form a tension spring can be used following casting for breaking up the ceramic casting core.
    Type: Application
    Filed: July 21, 2004
    Publication date: September 15, 2005
    Inventors: Rolf Pfeifer, Ralf Lebbing, Jialin Shen
  • Publication number: 20040216860
    Abstract: Casting mold for metal casting, in particular precision casting of fine parts of steel, wherein at least the main part of the casting mold is comprised of porous ceramic with a high thermal coefficient of expansion which corresponds to the metal, and produced by generative rapid prototyping process, as well as generative rapid prototyping processes and coated powders particularly suitable therefore, as well as uses of the casting mold for tools and their components, in particular of steel.
    Type: Application
    Filed: April 16, 2004
    Publication date: November 4, 2004
    Inventors: Rolf Pfeifer, Jialin Shen
  • Publication number: 20040182510
    Abstract: Process for layer-wise production of a three dimensional body (generative rapid prototyping), in particular by 3D binder printer, including a multiple succession of the steps of depositing a powder particle layer, activating in defined areas an adhesive present on the powder particles and/or in the powder particle coating, as well as adhering the powder particles to each other and to the layer thereunder, wherein the powder particle layer is electrically discharged by ionized particles and brushed flat by means of an electrically insulated blade prior to activation of the adhesive material, and the invention further concerns a device adapted for application of thin powder particle layers, including at least one ionizing device.
    Type: Application
    Filed: February 18, 2004
    Publication date: September 23, 2004
    Inventors: Rolf Pfeifer, Jialin Shen, Didier von Zeppelin