公开(公告)号：US11919228B2

公开(公告)日：2024-03-05

申请号：US17557826

申请日：2021-12-21

Applicant: Formlabs, Inc.

Inventor： Benjamin FrantzDale ,  Shane Wighton

IPC: B29C64/124 ,  B29C64/236 ,  B29C64/245 ,  B29C64/264 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/124 ,  B29C64/236 ,  B29C64/245 ,  B29C64/264 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: According to some aspects, techniques are provided to mitigate challenges with additive fabrication devices that utilize a film. These techniques include: improvements to an additive fabrication device build platform to more evenly apply forces onto the film; techniques for inhibiting adhesion between a pair of films and for removing dirt or dust therein; techniques for detecting and/or mitigating the effects of scratches or dust on films; and techniques for detecting film punctures, detecting an imminent film puncture, and/or reducing the impact on the device when punctures occur.

公开(公告)号：US11878467B2

公开(公告)日：2024-01-23

申请号：US16427734

申请日：2019-05-31

Applicant: Formlabs, Inc.

Inventor： Shane Wighton ,  Maxim Lobovsky ,  Robert Joachim ,  Jack Moldave ,  Adam Damiano ,  Christian Reed ,  Dmitri Megretski ,  Benjamin FrantzDale

IPC: B29C64/255 ,  B29C64/264 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/124 ,  B29C64/227 ,  B29C64/245 ,  B29C64/153 ,  B29C64/218 ,  B33Y40/00 ,  B29C64/307 ,  B29C64/223 ,  B29C64/135 ,  B29C64/393 ,  G01L1/12 ,  G01L5/00 ,  G04F10/10 ,  B65D65/40 ,  B65D5/40

CPC classification number: B29C64/255 ,  B29C64/124 ,  B29C64/135 ,  B29C64/153 ,  B29C64/218 ,  B29C64/223 ,  B29C64/227 ,  B29C64/245 ,  B29C64/264 ,  B29C64/307 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B65D65/40 ,  G01L1/127 ,  G01L5/0047 ,  G01L5/0076 ,  G04F10/10

Abstract: Techniques for producing a flat film surface in additive fabrication are provided. According to some aspects, a movable stage may be arranged beneath a container having a base that includes a flexible film. The movable stage may include a segmented member in which a number of segments are aligned along a common axis. The segmented member may maintain contact with the flexible film as the movable stage moves beneath the container, with the segmented member producing a flat surface of the flexible film, at least within a region above the movable stage. According to some embodiments, multiple segmented members may be provided within the movable stage, such as in parallel with one another.

公开(公告)号：US20240017493A1

公开(公告)日：2024-01-18

申请号：US18337716

申请日：2023-06-20

Applicant: Formlabs, Inc.

Inventor： Luke Plummer ,  Maria Rosa Ruiz ,  Carlos Ruiz-Vargas ,  Robert Morgan ,  Joseph Johnson ,  Connor Evans

IPC: B29C64/343 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/329 ,  B22F12/57 ,  B22F12/52

CPC classification number: B29C64/343 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/329 ,  B22F12/57 ,  B22F12/52 ,  B33Y10/00

Abstract: Techniques are described for consistently moving powder from a hopper into a trough for subsequent delivery into a build area of an additive fabrication system. A powder delivery apparatus may comprise a hopper, a trough, and a doser. The doser may be configured to rotate about an axis and may include a recess that, when the doser is rotated about the axis, travels into and out of the hopper and into and out of the trough. As a result, when powder is present in the hopper, the recess may carry powder from the hopper to the trough when the doser rotates. The trough and doser may be configured so that when the trough contains the desired amount of powder for recoating, the doser does not transfer additional material from the hopper into the trough. As a result, the amount of powder in the trough may be self-regulating.

公开(公告)号：US20230405938A1

公开(公告)日：2023-12-21

申请号：US18337650

申请日：2023-06-20

Applicant: Formlabs, Inc.

Inventor： Shane Wighton ,  Andrew M. Goldman ,  Henry Whitney ,  Justin Keenan

IPC: B29C64/393 ,  B29C64/245 ,  B29C64/236 ,  B29C64/286 ,  B29C64/129 ,  B29C64/268 ,  G01N21/958 ,  B33Y50/00 ,  G01N21/94 ,  B29C64/386

CPC classification number: B29C64/393 ,  B29C64/245 ,  B29C64/236 ,  B29C64/286 ,  B29C64/129 ,  B29C64/268 ,  G01N21/958 ,  B33Y50/00 ,  G01N21/94 ,  B29C64/386 ,  B33Y10/00

Abstract: According to some aspects, techniques are provided for identifying contamination in additive fabrication devices by measuring light interacting with the contamination using one or more light sensors. Contamination located between a light source and a target of a light source can affect the uniformity and intensity of the light source when incident upon the target. For instance, in an inverse stereolithography device, contamination located between a light source and a liquid photopolymer resin that is to be cured can affect the quality of the fabricated object when the light is scattered or blocked by the contamination. Identifying the presence of contamination between the light source and the liquid photopolymer resin and alerting the user prior to initiating a fabrication process may increase the quality of the resulting fabricated object and improve the user experience by saving time and photocurable liquid.

公开(公告)号：US20230382053A1

公开(公告)日：2023-11-30

申请号：US18322059

申请日：2023-05-23

Applicant: Formlabs Inc.

Inventor： Maxim Lobovsky ,  Andrew Goldman

IPC: B29C64/393 ,  B29C64/124 ,  B33Y10/00 ,  B33Y50/02

CPC classification number: B29C64/393 ,  B29C64/124 ,  B33Y10/00 ,  B33Y50/02

Abstract: A method for producing a three-dimensional (3D) object on an additive fabrication device includes receiving, by a computer, print instructions for the 3D object. The print instructions include a sequence of print maps, each print map corresponding to a sub-instruction for producing a respective cross-section of the 3D object. The method also includes exposing, by an energy source, resin stored in a resin container at a print plane according to a first print map of the sequence of print maps, and modifying a second print map of the sequence of print maps. The method further includes exposing, by the energy source, resin stored in the resin container at the print plane according to the modified second print map.

公开(公告)号：US20230250288A1

公开(公告)日：2023-08-10

申请号：US18060249

申请日：2022-11-30

Applicant: Formlabs Inc.

Inventor： Alexander Philip Haring

IPC: C08L83/08 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/124

CPC classification number: C08L83/08 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/124 ,  C08L2205/025 ,  C08L2205/035 ,  B29K2083/00

Abstract: Methods and compositions for additive manufacturing of silicone parts are provided. The methods can use SLA printing techniques to print silicone parts that exhibit excellent hardness, tear strength and elongation at break. The parts can be produced by using low dosages of radiation. In various embodiments, the silicone compositions include a mercapto-derivatized polysiloxane having two or more functional groups, an alkenyl-derivatized polysiloxane, and a photo-initiator.

公开(公告)号：US20230182390A1

公开(公告)日：2023-06-15

申请号：US18062627

申请日：2022-12-07

Applicant: Formlabs Inc.

Inventor： Dmitri Megretski ,  Benjamin FrantzDale ,  Jacob Sanchez ,  Alec Rudd

IPC: B29C64/30 ,  B29C64/264 ,  B33Y40/00

CPC classification number: B29C64/30 ,  B29C64/264 ,  B33Y40/00 ,  B33Y10/00

Abstract: A method includes curing a photopolymer resin disposed between a first build surface and a flexible film layer to form a print layer of a printed part. Here, the print layer of the printed part defines a second build surface attached to the flexible film layer. The method also includes translating a peeling mechanism between the second build surface and the flexible film layer to detach the flexible film layer from the second build surface.

公开(公告)号：US20230150200A1

公开(公告)日：2023-05-18

申请号：US17813771

申请日：2022-07-20

Applicant: Formlabs Inc.

Inventor： Andrew Goldman ,  Hayley Whelan ,  Henry Whitney ,  Maxim Lobovsky ,  Mehmet Dogan

IPC: B29C64/286 ,  G02F1/1335 ,  G02F1/13357 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/129 ,  C08J5/18 ,  C08K5/23 ,  C09B67/20

CPC classification number: B29C64/286 ,  G02F1/133528 ,  G02F1/133603 ,  G02F1/133617 ,  G02F1/13362 ,  G02F1/133607 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/129 ,  C08J5/18 ,  C08K5/235 ,  C09B67/0063 ,  C08J2329/04

Abstract: A curing system for an additive fabrication system includes a light source, a liquid crystal cell, and a first polarizer. The light source is configured to emit light at a wavelength suitable for curing a material. The liquid crystal cell is configured to receive the light from the light source. The first polarizer comprises a polyvinyl alcohol (PVA) matrix and organic dyes impregnated into the PVA matrix.

公开(公告)号：US20230078198A1

公开(公告)日：2023-03-16

申请号：US17867201

申请日：2022-07-18

Applicant: Formlabs, Inc.

Inventor： Maxim Lobovsky ,  Shane Wighton ,  Dmitri Megretski ,  Adam Damiano

IPC: B29C64/255 ,  B65D65/40 ,  B29C64/264 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/124 ,  B29C64/393 ,  B29C64/227 ,  G01L1/12 ,  G01L5/00 ,  G04F10/10 ,  B29C64/245 ,  B29C64/153 ,  B29C64/218 ,  B33Y40/00 ,  B29C64/307 ,  B29C64/223 ,  B29C64/135

Abstract: Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.

公开(公告)号：US11579041B2

公开(公告)日：2023-02-14

申请号：US16818886

申请日：2020-03-13

Applicant: Formlabs, Inc.

Inventor： Andrew M. Goldman ,  Henry Whitney ,  Justin Keenan ,  Benjamin FrantzDale ,  Michael Fogleman ,  Maxim Lobovsky

IPC: B29C64/393 ,  G01M11/02 ,  B33Y30/00 ,  B33Y50/00 ,  B29C64/386

Abstract: According to some aspects, calibration techniques are provided that allow an optics module of an additive fabrication device to be installed and operated in a stereolithography device by a user. In particular, the calibration techniques enable the optics module to be calibrated in a way that only depends on the characteristics of the optics module, and not upon any other components of the stereolithography device. As a result, the techniques enable a user of a stereolithography device to remove one optics module and replace it with another, without it being necessary to repair or replace the whole device. In some cases, the calibration techniques may include directing light onto one or more fiducial targets within the stereolithography device and measuring light scattered from said targets.