公开(公告)号：US20220032538A1

公开(公告)日：2022-02-03

申请号：US17280292

申请日：2019-10-01

Applicant: DENTSPLY SIRONA inc.

Inventor： Thomas MICHALICA ,  Thomas HASENZAHL ,  Christian SCHMIDT ,  Christian STAHL

IPC: B29C64/124 ,  B29C64/255 ,  B29C64/245 ,  B29C64/264 ,  B29C64/232 ,  B29C64/295 ,  B33Y30/00 ,  B33Y10/00

Abstract: Device (1) for a system for layer-by-layer construction of a body (K) from a substance (S) which can be hardened by radiation, comprising a vat (3) having a vat base (2) for receiving the substance (S) which can be hardened by radiation, comprising a building platform (4) which is arranged above the vat base (2) and which is height-adjustable in relation to the vat base (2) and comprising a sensor (5) cooperating with the vat base (2), wherein the vat base (2) is configured to be at least partially flexible, wherein a chamber (6) is provided wherein the chamber (6) is delimited by an underside of the vat base (2), wherein the sensor (5) is adapted to detect a volume change of the chamber (6) and to provide a sensor signal from which a sign of the volume change can be determined.

公开(公告)号：US20220134657A1

公开(公告)日：2022-05-05

申请号：US17431456

申请日：2020-02-28

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Christian SCHMIDT ,  Thomas HASENZAHL

IPC: B29C64/25 ,  B29C64/35 ,  B29C64/255 ,  B29C64/264 ,  B29C64/295 ,  B29C64/371 ,  B29C64/129

Abstract: Component carrier for an additive manufacturing device, wherein the component carrier comprises a construction surface, on which a component to be manufactured is disposed during the operation of the manufacturing device, wherein the component carrier comprises a sealing surface which radially surrounds the construction surface, and method for post-processing a component manufactured according to an additive manufacturing process using such a component carrier.

公开(公告)号：US20220152915A1

公开(公告)日：2022-05-19

申请号：US17435597

申请日：2020-03-11

Applicant: DENTSPLY SIRONA inc.

Inventor： Thomas HASENZAHL

IPC: B29C64/124 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y30/00

Abstract: A stereolithography apparatus (1) for generating a three-dimensional object (2) from a photocurable substance (3), comprising: a vat (4) for storing the photocurable substance (3); and a platform (5) for supporting the three-dimensional object (2), wherein the platform (5) is movable relative to the vat (4); an optical unit (6) for sequentially projecting layered images towards the photocurable substance (3) for hardening the photocurable substance (3) deposited between the three-dimensional object (2) and the bottom of the vat (4); further comprising: an oscillation unit (7) adapted to horizontally oscillate the vat (4) concomitantly with the projection of the layered images with a substantially constant amplitude that is smaller than the pixel size of the layered images in the horizontal direction for preventing adhesion of the three-dimensional object (2) to the bottom of the vat (4).

公开(公告)号：US20220054239A1

公开(公告)日：2022-02-24

申请号：US17291635

申请日：2019-11-14

Applicant: DENTSPLY SIRONA INC.

Inventor： Hans-Christian SCHNEIDER ,  Helmut SEIBERT ,  Thomas HASENZAHL ,  Mathias MORGENROTH

IPC: A61C13/00 ,  A61C13/083

Abstract: The invention relates to a disk-shaped blank made of a final-strength dental ceramic, comprising a casing surrounding a perimeter of the final-strength dental ceramic, the casing made of a material that is softer than the final-strength ceramic, and in particular made of wood or plastic material.

公开(公告)号：US20220134658A1

公开(公告)日：2022-05-05

申请号：US17431239

申请日：2020-02-25

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Christian SCHMIDT ,  Thomas HASENZAHL ,  Michael SCHWAIGER ,  Markus KUHNLE ,  Andreas RIES

IPC: B29C64/255 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y40/10 ,  B29C64/343 ,  B29C64/386 ,  B29C64/314 ,  G01F23/263

Abstract: Material unit for an additive manufacturing device (AM) having a resin vat, wherein the resin vat comprises a base which is transparent at least in sections, wherein the resin vat is connected to a holder for a reservoir, and wherein the holder is configured such that resin (R) emerging from an outlet of a reservoir held by said holder can flow into the resin vat.

公开(公告)号：US20210393381A1

公开(公告)日：2021-12-23

申请号：US17291844

申请日：2019-11-18

Applicant: DENTSPLY SIRONA INC.

Inventor： Hans-Christian SCHNEIDER ,  Helmut SEIBERT ,  Thomas HASENZAHL ,  Mathias MORGENROTH

IPC: A61C13/00

Abstract: The invention relates to a method for producing ceramic dental prosthesis parts by way of a CAD/CAM machining station, comprising the following steps:—providing a disk-shaped ceramic blank, wherein the blank has the final strength;—attaching the blank in a mounting device of the CAD/CAM machining station;—controlling the CAD/CAM machining station for establishing an initial contact between the blank and the grinding tool in such a way that, due to the rotation of the grinding tool about the longitudinal axis (13) thereof, the entire contact surface (21) between the grinding tool and the blank has relative movement; and—machining the blank by way of the rotating grinding tool, proceeding from the initial contact, to produce the ceramic dental prosthesis parts.