Patents by Inventor Wolfgang DIEKMANN
Wolfgang DIEKMANN 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: 11920008Abstract: A polymer composition can be used for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polymer has open mesopores and the cumulative pore volume distribution of the mesopores, measured to DIN 66134, is at least 0.01 cm3/g.Type: GrantFiled: October 26, 2021Date of Patent: March 5, 2024Assignee: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe, Franz-Erich Baumann, Wolfgang Christoph, Sylvia Monsheimer, Beatrice Küting
-
Publication number: 20230279180Abstract: Polyether ether ketone copolymers can have the following formula (I), Therein, Ar1 contains 75 to 98 mol %, preferably 78 to 97 mol %, of 1,4-phenylene groups and 2 to 25 mol %, preferably 3 to 22 mol %, of X,Y-naphthylene groups. In the X,Y-naphthylene groups, X?Y, X and Y independently of one another are an integer value of 1 to 10, and 2,7-naphthylene groups are excluded. The mol % values relate to the amount of substance of Ar1, wherein all Ar1 groups sum to 100 mol %. The constituent Ar2 contains 2,2?-bisphenylmethanone groups, 2,4?-bisphenylmethanone groups, 3,3?-bisphenylmethanone group, 4,4?-bisphenylmethanone groups, or mixtures thereof, preferably 4,4?-bisphenylmethanone groups. The index n is 10 to 10000. The copolymers have a reduced melting point and are suitable for producing three-dimensional objects in powder bed fusion processes.Type: ApplicationFiled: July 13, 2021Publication date: September 7, 2023Applicant: Evonik Operations GmbHInventors: Adam Mondrzyk, Marco Gensheimer, Wolfgang Diekmann
-
Patent number: 11511488Abstract: A device produces three-dimensional objects layer by layer in a powder bed fusion process. The device includes a building space, at least one energy source, a building area with a building space platform and a building space container laterally confining the building space platform. The building space platform has an upper side, facing a powder, and an underside, facing away from the powder. The upper side of the building space platform includes a material with a thermal conductivity of at least 20 W/(m·K) and the underside of the building space platform includes a material with a thermal conductivity of a maximum of 0.5 W/(m·K). The contact surface of the upper side of the building space platform with respect to the powder or with respect to the cooling medium is raised by at least 20% in comparison with the planar surface of a building space platform.Type: GrantFiled: December 17, 2018Date of Patent: November 29, 2022Assignee: Evonik Operations GmbHInventors: Maik Grebe, Wolfgang Diekmann, Sigrid Hessel, Maximilian Gruhn
-
Publication number: 20220184905Abstract: A process can be used for the surface treatment of three-dimensional objects which have been produced in additive manufacturing processes from at least one polymer. The process involves a) immersing the three-dimensional object in a substance mixture A, b) leaving the three-dimensional object in the substance mixture A for a time, and c) removing the three-dimensional object from the substance mixture A. The process then involves d) immersing the three-dimensional object in a substance mixture B, e) leaving the three-dimensional object in the substance mixture B for a time, and f) removing the three-dimensional object from the substance mixture B. The substance mixture A has a temperature (process temperature A) which is above the melting point of the polymer, and the substance mixture B has a temperature (process temperature B) which is below the melting point of the polymer.Type: ApplicationFiled: February 17, 2020Publication date: June 16, 2022Applicant: Evonik Operations GmbHInventors: Maik GREBE, Wolfgang Diekmann, Andreas Domingues Baptista
-
Publication number: 20220098372Abstract: A polymer composition can be used for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polymer has open mesopores and the cumulative pore volume distribution of the mesopores, measured to DIN 66134, is at least 0.01 cm3/g.Type: ApplicationFiled: October 26, 2021Publication date: March 31, 2022Applicant: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe, Franz-Erich Baumann, Wolfgang Christoph, Sylvia Monsheimer, Beatrice Küting
-
Patent number: 11285662Abstract: A process for melting/sintering powder particles for layer-by-layer production of three-dimensional objects is performed by a) applying a layer of a powder material solidifiable under the action of electromagnetic radiation, b) heating the powder material to not more than 10 K below the melting point according to DIN 53765 by a radiation from a heat-radiating element whose maximum radiation intensity is at a wavelength of 5000 nm or at longer wavelengths, c) selective melting/sintering of at least a region of the powder material which corresponds to the cross section of the three-dimensional object, d) repeating steps a) to c) until the three-dimensional object is obtained.Type: GrantFiled: February 27, 2020Date of Patent: March 29, 2022Assignee: Evonik Operations GmbHInventors: Maik Grebe, Wolfgang Diekmann, Sigrid Hessel-Geldmann, Jürgen Kreutz
-
Patent number: 11254030Abstract: A polymer powder having a surface energy of less than 35 mN/m is suitable for melting/sintering powder particles for layer-by-layer production of three-dimensional objects.Type: GrantFiled: January 27, 2020Date of Patent: February 22, 2022Assignee: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe
-
Publication number: 20210371346Abstract: A polyamide powder for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polyamide powder has a solution viscosity to ISO 307 of 1.8 to 2 and a rise in the solution viscosity of 0% to 25% when it is subjected to a temperature 20° C. below its melting temperature under air for 20 hours.Type: ApplicationFiled: August 11, 2021Publication date: December 2, 2021Applicant: Evonik Operations GmbHInventors: Wolfgang DIEKMANN, Maik Grebe, Franz-Erich Baumann, Sylvia Monsheimer, Beatrice Küting
-
Patent number: 11186688Abstract: A polymer composition can be used in selective absorbing sintering, SAS, or selective inhibition sintering, SIS, methods. The polymer of the polymer composition has open mesopores, where a cumulative pore volume distribution of the mesopores, measured according to DIN 66134, is at least 0.01 cm3/g.Type: GrantFiled: December 14, 2016Date of Patent: November 30, 2021Assignee: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe, Franz-Erich Baumann, Wolfgang Christoph, Sylvia Monsheimer, Beatrice Küting
-
Patent number: 11117837Abstract: A polyamide powder for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polyamide powder has a solution viscosity to ISO 307 of 1.8 to 2 and a rise in the solution viscosity of 0% to 25% when it is subjected to a temperature 20° C. below its melting temperature under air for 20 hours.Type: GrantFiled: September 29, 2017Date of Patent: September 14, 2021Assignee: Evonik Operations GbmHInventors: Wolfgang Diekmann, Maik Grebe, Franz-Erich Baumann, Sylvia Monsheimer, Beatrice Küting
-
Patent number: 10968314Abstract: A polymer powder which is suitable for a powder bed fusion method contains a polymeric material coated with a hydrophobic substance that is at least one selected from the group consisting of a saturated fatty alcohol, an unsaturated fatty alcohol, a saturated fat, an unsaturated fat, a wax, a lactam, an alkene, and an alkane.Type: GrantFiled: December 14, 2016Date of Patent: April 6, 2021Assignee: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe
-
Publication number: 20200307085Abstract: A device produces three-dimensional objects layer by layer in a powder bed fusion process. The device includes a building space, at least one energy source, a building area with a building space platform and a building space container laterally confining the building space platform. The building space platform has an upper side, facing a powder, and an underside, facing away from the powder. The upper side of the building space platform includes a material with a thermal conductivity of at least 20 W/(m.K) and the underside of the building space platform includes a material with a thermal conductivity of a maximum of 0.5 W/(m·K), The contact surface of the upper side of the building space platform with respect to the powder or with respect to the cooling medium is raised by at least 20% in comparison with the planar surface of a building space platform.Type: ApplicationFiled: December 17, 2018Publication date: October 1, 2020Applicant: Evonik Operations GmbHInventors: Maik Grebe, Wolfgang Diekmann, Sigrid Hessel, Maximilian Gruhn
-
Patent number: 10787559Abstract: Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the d50 median diameter of the core particles is from 3 to 100 ?m and wherein the glass core particle material is at least one selected from the group consisting of a solid glass bead, a hollow glass bead, a porous glass bead, and a foamed glass particle. A method to prepare the particles includes dissolution of a polymer in a solvent and precipitation of the polymer in the presence of a suspension of the core glass particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.Type: GrantFiled: July 3, 2012Date of Patent: September 29, 2020Assignee: Evonik Operations GmbHInventors: Sylvia Monsheimer, Wolfgang Diekmann, Franz-Erich Baumann, Sigrid Hessel-Geldmann, Kristiane Warnke, Heike Stemmer, Stefan Altkemper
-
Publication number: 20200230937Abstract: A process for melting/sintering powder particles for layer-by-layer production of three-dimensional objects is performed by a) applying a layer of a powder material solidifiable under the action of electromagnetic radiation, b) heating the powder material to not more than 10 K below the melting point according to DIN 53765 by a radiation from a heat-radiating element whose maximum radiation intensity is at a wavelength of 5000 nm or at longer wavelengths, c) selective melting/sintering of at least a region of the powder material which corresponds to the cross section of the three-dimensional object, d) repeating steps a) to c) until the three-dimensional object is obtained.Type: ApplicationFiled: February 27, 2020Publication date: July 23, 2020Applicant: Evonik Operations GmbHInventors: Maik GREBE, Wolfgang Diekmann, Sigrid Hessel-Geldmann, Juergen Kreutz
-
Publication number: 20200156287Abstract: A polymer powder having a surface energy of less than 35 mN/m is suitable for melting/sintering powder particles for layer-by-layer production of three-dimensional objects.Type: ApplicationFiled: January 27, 2020Publication date: May 21, 2020Applicant: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe
-
Patent number: 10632730Abstract: A process for melting/sintering powder particles for layer-by-layer production of three-dimensional objects is performed by a)applying a layer of a powder material solidifiable under the action of electromagnetic radiation, b) heating the powder material to not more than 10 K below the melting point according to DIN 53765 by a radiation from a heat-radiating element whose maximum radiation intensity is at a wavelength of 5000 nm or at longer wavelengths, c) selective melting/sintering of at least a region of the powder material which corresponds to the cross section of the three-dimensional object, d)repeating steps a) to c) until the three-dimensional object is obtained.Type: GrantFiled: March 24, 2017Date of Patent: April 28, 2020Assignee: Evonik Operations GmbHInventors: Maik Grebe, Wolfgang Diekmann, Sigrid Hessel-Geldmann, Juergen Kreutz
-
Patent number: 10596728Abstract: A polymer powder having a surface energy of less than 35 mN/m is suitable for melting/sintering powder particles for layer-by-layer production of three-dimensional objects.Type: GrantFiled: December 14, 2016Date of Patent: March 24, 2020Assignee: Evonik Operations GmbHInventors: Wolfgang Diekmann, Maik Grebe
-
Patent number: 10479733Abstract: Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the d50 median diameter of the core particles is 1 ?m or greater and the ratio of the d50 median diameter of the composite particles to the d50 median diameter of the core particles is 1.15 or greater, are provided. A method to prepare the particles includes dissolution of a polymer in a solvent and reprecipitation of the polymer in the presence of a suspension of the core particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.Type: GrantFiled: June 29, 2012Date of Patent: November 19, 2019Assignee: Evonik Degussa GmbHInventors: Wolfgang Diekmann, Franz-Erich Baumann, Maik Grebe, Kristiane Warnke, Sylvia Monsheimer
-
Publication number: 20190275731Abstract: The invention relates to a polymer powder for use in a layer-by-layer method in which areas of each powder layer are selectively fused by introducing electromagnetic energy. Said polymer powder contains: at least one AB-type polyamide produced by polymerizing lactams comprising 10 to 12 carbon atoms in the monomer unit or polycondensing the corresponding ?-amino carboxylic acids comprising 10 to 12 carbon atoms in the monomer unit and at least one AABB-type polyamide produced by polycondensing diamines and dicarboxylic acids, each of which comprises 10 to 14 carbon atoms in the monomer units, the AB-type polyamide containing up to 20 mole % of the AABB comonomer units and the AABB-type polyamide containing up to 20 mole % of the AB monomer units.Type: ApplicationFiled: May 24, 2019Publication date: September 12, 2019Applicant: Evonik Degussa GmbHInventors: Franz Erich BAUMANN, Wolfgang Diekmann, Beatrice Kueting, Heike Stemmer, Maik Grebe, Kristiane Warnke, Sylvia Monsheimer, Harald Haeger
-
Patent number: 10406745Abstract: Disclosed herein is a polymer powder containing a polyamide of AB type, produced by polymerizing at least one lactam having from 10 to 12 carbon atoms in a monomer unit or by polycondensing at least one corresponding ?-aminocarboxylic acid having from 10 to 12 carbon atoms in a monomer unit, and a polyamide of AABB type, produced by polycondensing at least one diamine and at least one dicarboxylic acid having respectively from 10 to 14 carbon atoms in monomer units. The polyamide of the AB type and the polyamide of the AABB type are prepared separately and then coprecipitated to form the polymer powder, and the polymer powder is a physical mixture of the polyamide of the AB type and the polyamide of the AABB type. Also disclosed herein is a method for producing the polymer powder.Type: GrantFiled: October 13, 2017Date of Patent: September 10, 2019Assignee: Evonik Degussa GmbHInventors: Franz Erich Baumann, Wolfgang Diekmann, Beatrice Kueting, Heike Stemmer, Maik Grebe, Kristiane Warnke, Sylvia Monsheimer, Harald Haeger