3D printing system

Patent metadata

Field	Value
Publication number	US-11813794-B2
Application number	US-202117453331-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Nov 2, 2021
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

A 3D printing system may include a tank in which a bottom of the tank is formed by a radiation-transparent flexible membrane, a spill tray with an outer wall configured to contain liquid resin that inadvertently leaks out from the bottom of the tank, and a light source configured to project radiation towards the bottom of the tank. The spill tray may contain an inner opening that allows the radiation from the light source to pass through the spill tray to the tank. A 3D printing system may also include a mask assembly which comprises a mask with pixels configurable to be individually transparent or opaque to portions of the radiation projected from the light source and a mask assembly receiving member configured to receive the mask assembly. The mask assembly may also include a rigid guide portion that is insertable into a slot of the mask assembly receiving member.

First claim

What is claimed is:

1. A vat polymerization printer, comprising:
a tank, wherein a bottom of the tank is formed by a radiation-transparent flexible membrane;
a light source configured to project radiation towards the bottom of the tank;
a mask assembly comprising a mask extending along a first plane with pixels configurable to be individually transparent or opaque to portions of the radiation projected from the light source, and a frame securely attached to a perimeter of the mask, the mask being disposed between the light source and the tank, wherein the frame comprises a plurality of ring members each extending in a first direction parallel to the first plane and a rigid guide portion disposed between two of the plurality of ring members, the rigid guide portion extending in a second direction perpendicular to the first plane; and
a mask assembly receiving member configured to receive the mask assembly, wherein the plurality of ring members are configured to secure the mask assembly to magnetic posts of the mask assembly receiving member, the ring members each configured to receive a corresponding one of the magnetic posts therein, wherein the tank is removably attached to the magnetic posts via corresponding magnets or ferromagnetic materials disposed on a bottom surface thereof, and wherein the rigid guide portion is insertable into a slot of the mask assembly receiving member.

2. The vat polymerization printer of claim 1 , wherein an end of the rigid guide portion comprises a first electrical connector with a male coupling, wherein the vat polymerization printer comprises a second electrical connector with a female coupling, and wherein the male coupling is configured to be inserted within the female coupling.

3. The vat polymerization printer of claim 2 , wherein the first electrical connector with the male coupling is one of a high-definition multimedia interface (HDMI) connector, a mobile industry processor interface (MIPI) connector, a digital visual interface (DVI) connector, a DisplayPort (DP) connector or a low-voltage differential signaling (LVDS) connector.

4. The vat polymerization printer of claim 1 , wherein an end of the rigid guide portion comprises a first electrical connector with a female coupling, wherein the vat polymerization printer comprises a second electrical connector with a male coupling, and wherein the male coupling is configured to be inserted within the female coupling.

5. The vat polymerization printer of claim 4 , wherein the first electrical connector with the female coupling is one of a high-definition multimedia interface (HDMI) connector, a mobile industry processor interface (MIPI) connector, a digital visual interface (DVI) connector, a DisplayPort (DP) connector or a low-voltage differential signaling (LVDS) connector.

6. The vat polymerization printer of claim 1 , wherein the mask assembly is secured to the mask assembly receiving member via screws.

7. The vat polymerization printer of claim 1 , wherein the mask assembly receiving member comprises an opening that allows the radiation from the light source to pass through the mask assembly receiving member.

8. The vat polymerization printer of claim 1 , wherein the mask comprises a liquid crystal display (LCD).

Assignees

• Nexa3D Inc

Inventors

• Buckby Matthew
• Whetsell Francis Kenyon
• Sandoval Miguel Cuevas
• Reichental Avi N

Classifications

• B29C64/286 Primary

  Optical filters, e.g. masks · CPC title

• B29C64/124

  using layers of liquid which are selectively solidified · CPC title

• B29C64/255

  Enclosures for the building material, e.g. powder containers · CPC title

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B29C64/129 Primary

  characterised by the energy source therefor, e.g. by global irradiation combined with a mask · CPC title