3m Innovative Properties Company

Solventum Intellectual Properties Company

3m Espe Ag

Gioacchino Raia

Malte Korten

Andreas G Herrmann

Adrian S Eckert

Reinhold Hecht

Helmar B Mayr

Bastian P Kirchner

Gallus Schechner

Anja Friedrich

Bernhard Hofmann

Rainer A Guggenberger

Christoph H Thalacker

Karsten Dede

Christian A Richter

Manfred Ludsteck

Daniel D Oberpertinger

Dietmar Blees

Peter Bissinger

Martin Goetzinger

Ralf M Paehl

Thomas Luchterhandt

Uwe H Hoheisel

Bettina Hailand

Till Meurer

Marion B Kestel

Michael M Cub

Joel D Oxman

Marc Peuker

Richard E Raby

Joachim Zech

Bruce R Broyles

Helmut Pauser

Michael Jahns

Carsten Franke

Hendrik M Grupp

Wolf Steiger

John W Dubbe

Henry C Gydesen

Oliver Kappler

Jeffrey N Bartow

Hans R Schnagl

Reinhold Nowak

Gareth A Hughes

Benjamin C MacMurray

Andrea Stippschild

Susanne Wegner

Thomas K Müller

Kyle C Picha

Vitore Hasanaj

Karin Zanklmaier

Nicholas S Wren

Matthew T Lingscheit

Jesse J Gilles

Leif J Erickson

Andrea Stippschild-Boxler

Eric H Tsai

Hendrik Grupp

Dirk Albrecht

Joel David Oxman Oxman

A 3D printing system is disclosed, comprising a 3D printing device with a build plate and at least two workpiece holders, each having a manufacturing surface for additive manufacturing. The system includes an adapter with recesses for receiving portions of the workpiece holders, allowing the workpiece holders to be releasably attached to the build plate. The system also integrates post-processing devices controlled by a handling robot and a controller to streamline the manufacturing process, ensuring high precision and efficiency. Additionally, the disclosed technology covers a method for manufacturing at least two workpieces using the 3D printing system, which includes steps for hardening layers of material and removing workpieces post-production. Furthermore, the system includes an adapter set for attaching workpiece holders to the 3D printing device, enabling efficient transitions between different manufacturing stages and enhancing overall productivity.

3D printing system and method for manufacturing workpieces and adapter set for attaching workpiece holders to a 3D printing device

The present disclosure provides apparatuses and methods for manufacturing three-dimensional objects. Each additive manufacturing apparatus () includes: a) a reservoir () for receiving hardenable material; b) a first movable light engine () providing a first light radiation configuration; a second light engine () providing a second light radiation configuration that is different than the first light radiation configuration; and d) a light altering structure (). The light altering structure is located between the reservoir and light radiated from at least one of the first movable light engine or the second light engine. The first movable light engine is configured to radiate light onto a first focal plane () within the reservoir containing the hardenable material and the second light engine is configured to radiate light onto a second focal plane () within the reservoir containing the hardenable material. The method includes: a) obtaining a hardenable material disposed in a reservoir; b) selectively radiating light having a first light radiation configuration from a first movable light engine; and c) selectively radiating light having a second light radiation configuration from a second light engine onto a second focal plane within the hardenable material. The apparatuses and methods can advantageously form objects having different resolutions on demand using the same apparatus, plus optionally can blend light from multiple light engines.

Additive manufacturing apparatus including two light engines and a light altering structure and a method of additive manufacturing a three-dimensional object

A method of building up at least a first () and a second () physical workpiece from a light hardenable material () on a 3D printing device (). The method has the steps of providing to the 3D printing device a first dataset for building up a first workpiece; starting a first print job based on the first dataset; providing to the same 3D printing device a second dataset for building up a second workpiece after the start the first print job; and starting a second print job based on the second dataset before finishing the first print job.

Method of time-shifted and time-overlapping building up physical workpieces by additive manufacturing

The present disclosure provides methods including obtaining an insert comprising a sieve defining openings each having a diameter of 10 to 200 micrometers; placing a volume of a fluid containing a photopolymerizable composition and a contaminant in the insert; and subjecting the volume of the fluid to a centrifugal force to separate the contaminant from at least a portion of the photopolymerizable composition by retaining the contaminant in the insert and passing at least a portion the photopolymerizable composition through the sieve of the insert to provide a separated photopolymerizable composition. Systems are also provided, including an additive manufacturing apparatus, a centrifuge, and an insert configured to be inserted into the centrifuge. The methods and systems can advantageously assist in reclaiming photopolymerizable composition that has been contaminated, for reuse.

Methods and systems for processing photopolymerizable compositions

The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

Curable composition for producing a dental composite crown and process of production

The present disclosure provides a build platform for use in an additive manufacturing device that is builds up an object from layers of a light-hardenable resin, wherein the build platform comprises a build surface for building up the object thereon, and wherein the build surface comprises a ceramic material. The disclosure also provides a method of making a build surface comprises a ceramic surface. Further, the disclosure provides additive manufacturing devices that include build platforms comprising ceramic material. The disclosure also describes articles made using the methods and devices described.

Build platform for use in an additive manufacturing device

A method of building up a physical object by additive manufacturing which has the steps of building up the object and at least one support structure layer by layer along a build axis. The support structure supports the object relative to a build platform. During building up the object and the at least one support structure a connection is provided between the support structure and the object by a plurality of layers each of which being a common layer of the object and the support structure.

Method of building up a physical object by additive manufacturing

A process of producing a surface-modified 3-dimensional article, the process comprising the steps of providing a radiation-curable composition, building-up a 3-dimensional article by radiation-curing the radiation-curable composition layer by layer, preferably by using a stereolithography or digital light processing unit, partially removing radiation-curable composition which sticks to the surface of the 3-dimensional article, treating only a portion of the surface of the 3-dimensional article to which the radiation-curable composition is stuck with particles, applying an additional curing step to the 3-dimensional article, preferably by applying heat and/or radiation. A 3-dimensional article which can be obtained by such a process and a kit of parts comprising such a 3-dimensional article.

Process of producing a surface-modified 3-dimensional article

The invention relates to a process of producing a surface-modified non-metallic dental article, the process comprising the steps of providing a non-metallic dental article having an outer and an inner surface, applying a curable composition on the inner surface of the dental article (to form a layer of the curable composition on the inner surface), applying particles on the curable composition located on the inner surface of the dental article to achieve a surface roughness Ra of 1 to 30 μm, curing the applied curable composition, the chemical composition of the curable composition being different from the chemical composition of the dental article. The invention also relates to a surface-modified non-metallic dental article obtained or obtainable by such a process and a kit of parts comprising such a surface-modified non-metallic dental article and a dental cement.

Process for producing a surface-modified dental article

A method of making a physical object by additive manufacturing. The method has the steps of providing a light hardenable primary material (), building up the object () by successively hardening portions of the light hardenable primary material () by irradiating the portions with light, coating at least a part of the object () with a light permeable coating or oxygen protective material; and irradiating the coated object () with light and thereby post-hardening any light hardenable material ().

Method of making a physical object

The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23&#xb0; C. and a shear rate of 1 s. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

The invention relates to a radiation curable composition for additive-manufacturing processes, the composition comprising (meth)acrylate component(s) not comprising an urethane moiety having a molecular weight Mw of at least 1,000 as Component A1, photo initiator as Component B, red, yellow or orange dye or combination thereof as Component C, blue dye having a light absorption band in the range of 350 to 420 nm as Component D, and optionally stabilizer as Component E. The invention further relates to a process of producing an elastomeric 3-dim article from the radiation curable composition in an additive-manufacturing process and the obtained elastomeric 3-dim article.

Radiation curable composition for additive manufacturing processes

The invention relates to a coloured curable composition for use in an additive manufacturing process, the composition comprising a curable resin composition comprising radiation curable components, a photo initiator, a dye composition comprising a dye D1 and a dye D2, dye D1 having a light absorption maximum within a wave length range from 400 to 530 nm, dye D2 showing a light absorption maximum within a wave length range from 540 to 650 nm. The invention also relates to a 3-dim composite article obtained by processing the curable composition in an additive manufacturing process.

Coloured curable composition for additive manufacturing processes, 3-dim composite article and use thereof

An additive manufacturing system has a light permeable base, a build carrier for holding a workpiece and a light source which is arranged to emit light through the light permeable base. The light permeable base and the build carrier are positionable relative to each other in a build dimension in which the workpiece is built up. The system further has a resin vat in which the light permeable base forms a wall portion thereof. The system further comprises a plurality of resin supplies for supplying different light hardenable resins in direct contact with each other in said vat. The system facilitates the rapid manufacturing of a dental restoration having a color gradation.

Additive manufacturing system and a method of additive manufacturing

The invention relates to a preformed dental composite crown being characterized by its shape and chemical composition, the shape being characterized as follows: having an occlusal top surface and depending buccal, mesial, distal and lingual side surfaces, the side surfaces being connected to each other and forming a crown cervix, the wall thickness of the crown at the crown cervix being lower than 0.6 mm; at least two of opposing depending side surfaces having a concave shape; the chemical composition of the material the preformed dental composite crown is made of being a hardened composition comprising the following components: nano-filler(s) in an amount from 20 to 70 wt. %, resin matrix in an amount from 20 to 75 wt. %, wt. % with respect to the weight of the chemical composition, the resin matrix comprising urethane(meth)acrylate(s) and (meth)acrylate(s) not comprising a urethane moiety. The invention also relates to a kit of parts comprising such a preformed dental composite crown, processes for producing such crowns and the use of such a crown for treating a dental tooth.

Preformed dental composite crown, process of production and use thereof

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Turkenfeld, Germany

Gioacchino Raia