公开(公告)号：US11285669B2

公开(公告)日：2022-03-29

申请号：US16621525

申请日：2018-06-21

Applicant: DENTSPLY SIRONA INC.

Inventor： Christian Schmidt

IPC: B29C64/245 ,  B29C64/255 ,  B29C64/124 ,  B29K105/00 ,  B33Y30/00

Abstract: The invention relates to a container for holding a photosensitive liquid for use in a stereolithographic system in which a reference layer is exposed to radiation for the layer-by-layer or continuous creation of workpieces. At least one element of the container which is directly adjacent to the reference layer consists of at least one material which is at least partially transparent to the radiation and at least some of which has structures and/or pores which can receive and discharge, preferably also store, an inhibitor and/or an inhibitor mixture. Therefore, the element is not just able to supply the inhibitor but to a significant extent consists of the inhibitor itself, as a result of which the supplied flow is equalized or homogenized. Rapid or even continuous 3D printing is thus made possible in a cost-effective manner.

公开(公告)号：US10948235B2

公开(公告)日：2021-03-16

申请号：US15550401

申请日：2016-02-12

Applicant: DENTSPLY SIRONA inc.

Inventor： Peter Fornoff ,  Christian Schmidt

IPC: F27B17/02 ,  F27B5/14 ,  F27D11/02 ,  F27D11/06 ,  F27D99/00 ,  F27B17/00 ,  F27D11/08

Abstract: The invention relates to a sintering furnace for components made of a sintered material, in particular for dental components, comprising a furnace chamber having a chamber volume (VK) and a chamber inner surface (OK), wherein a heat-up device, a receiving space having a gross volume (VB) located in the chamber volume (VK) and delimited by the heat-up device, and a useful region having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber. The furnace chamber has an outer wall consisting of a plurality of walls having a wall portion to be opened for introduction into the receiving space of a component to be sintered and having an object volume (VO). In the furnace chamber the heat-up device has a thermal radiator having a radiation field which radiator is disposed on at least one side of the receiving space. Said thermal radiator has a specific resistance of 0.1 Ωmm2/m to 1,000,000 Ωmm2/m and has a total surface, the maximum of which is three times the chamber inner surface (OK). With this sintering furnace a heat-up temperature of at least 1100° C. can be achieved within 5 minutes at a maximum power input of 1.5 kW.

公开(公告)号：US11306969B2

公开(公告)日：2022-04-19

申请号：US15116936

申请日：2015-02-12

Applicant: DENTSPLY SIRONA Inc.

Inventor： Peter Fornoff ,  Christian Schmidt

IPC: F27B17/02 ,  A61C13/20

Abstract: The invention relates to a sintering furnace (1) for components (15) made of a sintered material, in particular for dental components, comprising a furnace chamber (2) having a chamber volume (VK), wherein a heating device (5), a receiving space (9) having a gross volume (VB) located in the chamber volume (VK) and delimited by the heating device (5), and a useful region (10) having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber (2). The furnace chamber (2) has an outer wall (3) consisting of a plurality of walls having a wall portion (7) to be opened for introduction of a component to be sintered having an object volume (VO) into the receiving space (9). In the furnace chamber (2) the heating device (5) has a thermal radiator (6) having a radiation field (13) which is disposed on at least one side of the receiving space (9). At least the useful volume (NV) disposed in the receiving space (9) is disposed in the radiation field (13) of the radiator (6), wherein the maximum possible distance (d) of the component (15) to be sintered from the radiator (6) corresponds to at most twice the dimension (Dy) of the maximum useful volume (VN).

公开(公告)号：US11969942B2

公开(公告)日：2024-04-30

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 ,  B29C64/129 ,  B29C64/255 ,  B29C64/264 ,  B29C64/295 ,  B29C64/35 ,  B29C64/371 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20

CPC classification number: B29C64/25 ,  B29C64/129 ,  B29C64/255 ,  B29C64/264 ,  B29C64/295 ,  B29C64/35 ,  B29C64/371 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20

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：US11780157B2

公开(公告)日：2023-10-10

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 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/264 ,  B29C64/232 ,  B29C64/245 ,  B29C64/255 ,  B29C64/295 ,  G01F22/02

CPC classification number: B29C64/124 ,  B29C64/232 ,  B29C64/245 ,  B29C64/255 ,  B29C64/264 ,  B29C64/295 ,  B33Y10/00 ,  B33Y30/00 ,  G01F22/02

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

公开(公告)号：US11650014B2

公开(公告)日：2023-05-16

申请号：US17674074

申请日：2022-02-17

Applicant: DENTSPLY SIRONA Inc.

Inventor： Peter Fornoff ,  Christian Schmidt

IPC: F27B17/02 ,  A61C13/20

CPC classification number: F27B17/025 ,  A61C13/20 ,  F27B17/02

Abstract: A sintering furnace for components made of a sintered material, in particular for dental components, having a furnace chamber having a chamber volume (VK). A heating device, a receiving space having a gross volume (VB) located in the chamber volume (VK) and delimited by the heating device, and a useful region having a useful volume (VN) located in the gross volume (VB), are disposed in the furnace chamber. The furnace chamber has an outer wall consisting of walls having a wall portion to be opened for introduction of a component to be sintered having an object volume (VO) into the receiving space. In the furnace chamber the heating device has a thermal radiator having a radiation field which is disposed on at least one side of the receiving space. At least the useful volume (NV) disposed in the receiving space is disposed in the radiation field of the radiator.

公开(公告)号：US12066249B2

公开(公告)日：2024-08-20

申请号：US16078074

申请日：2017-02-24

Applicant: DENTSPLY SIRONA inc.

Inventor： Christian Schmidt ,  Michael Baurer

IPC: F27B17/02 ,  A61C13/00 ,  A61C13/08 ,  A61C13/20 ,  F27D5/00 ,  F27D9/00 ,  F27D19/00 ,  F27D21/00

CPC classification number: F27B17/025 ,  A61C13/00 ,  A61C13/08 ,  A61C13/20 ,  F27D5/0043 ,  F27D9/00 ,  F27D19/00 ,  F27D21/00 ,  F27D21/0014 ,  F27D2019/0018

Abstract: An induction furnace for carrying out a heat treatment of a dental replacement part. The induction furnace includes an induction coil, a radiant heater, an insulation layer and a furnace chamber. The induction furnace has a cooling system with a liquid cooling system in order to control an internal temperature of the furnace chamber.

公开(公告)号：US11884017B2

公开(公告)日：2024-01-30

申请号：US17431239

申请日：2020-02-25

Applicant: SIRONA DENTAL SYSTEMS GMBH ,  DENTSPLY SIRONA inc.

Inventor： Christian Schmidt ,  Thomas Hasenzahl ,  Michael Schwaiger ,  Markus Kuhnle ,  Andreas Ries ,  Torsten Richter

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

CPC classification number: B29C64/255 ,  B29C64/314 ,  B29C64/343 ,  B29C64/386 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y50/00 ,  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：US11820079B2

公开(公告)日：2023-11-21

申请号：US17433356

申请日：2020-03-11

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Thomas Michalica ,  Christian Schmidt ,  Franz Basler

IPC: B29C64/393 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/232 ,  B29C64/236 ,  B29C64/241 ,  B29C64/129

CPC classification number: B29C64/393 ,  B29C64/129 ,  B29C64/232 ,  B29C64/236 ,  B29C64/241 ,  B33Y30/00 ,  B33Y50/02

Abstract: The present invention relates to a stereolithography apparatus for generating a three-dimensional object, comprising: an optical unit for projecting an image towards the photocurable substance for hardening the photocurable substance deposited in the focus layer; a control unit, characterized by further comprising: a detection unit which comprises: a detection means movably arranged in a detection region for detecting during the generation process or in a generation-pause the image projected by the optical unit and for outputting a detection signal; and a first driving means for moving the detection means into or out of the detection region, wherein the optical unit comprises: a second driving means linked to the optical unit for moving the focus layer into or out of the detection region, wherein the control unit adjusts the optical unit and/or modifies the image to be projected based on the signal indicative of the detected image.