Multi-material photocuring 3D printer and 3D printing method

Patent metadata

Field	Value
Publication number	US-11801632-B2
Application number	US-202117230616-A
Country	US
Kind code	B2
Filing date	Apr 14, 2021
Priority date	Jan 25, 2021
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

The present disclosure provides a multi-material photocuring 3D printer and a 3D printing method, wherein multi-material photocuring 3D printer comprises: a frame; a printing platform, arranged on frame; a lifting device, arranged on printing platform; a rotary motor, arranged on lifting device; a printing plate, arranged on rotary motor; wherein a bottom surface of printing plate is a printing plane; a plurality of resin slots, arranged on frame and located below printing plate; an optical engine, arranged on frame and located below printing plate. The present disclosure connects printing plate with rotary motor, after finishing printing with one material, it is possible to remove residual liquid resin on printed piece and printing plane by a method of high-speed centrifugation, to avoid any contaminations to printed piece, thereby ensuring printed piece in multi-material having a high precision and a high resolution.

First claim

What is claimed is:

1. A multi-material photocuring 3D printer, comprising:
a frame;
a printing platform, arranged on the frame;
a lifting device, arranged on the printing platform;
a rotary motor, arranged on the lifting device;
a printing plate, arranged on the rotary motor, wherein a bottom surface of the printing plate is a printing plane, and wherein the rotary motor is configured to rotate the printing plate;
a locking device positioned proximate to the rotary motor, wherein the locking device is configured to contact the rotary motor to stop a rotation of the rotary motor, and wherein the locking device comprises:
a bracket;
a first cylinder, arranged on the bracket;
a clamping assembly, arranged on the first cylinder; and
a clamped piece, arranged on the rotary motor and located at a middle position of the clamping assembly;
wherein the rotary motor is a double axis high-speed DC motor, the printing plate connects to a bottom end of the rotary motor through a flange coupling, and the clamped piece is arranged on a top end of the rotary motor;

a plurality of resin slots, arranged on the frame and located below the printing plate; and
an optical engine, arranged on the frame and located below the printing plate.

2. The multi-material photocuring 3D printer according to claim 1 , wherein:
the locking device is arranged on the lifting device;
wherein the rotary motor is arranged on the locking device; and
wherein the locking device contacts the rotary motor to restore the printing plate to an initial absolute position.

3. The multi-material photocuring 3D printer according to claim 1 , wherein the clamping assembly comprises:
two clamping blocks, wherein the clamping blocks are arranged oppositely on the first cylinder;
a clamping permanent magnet, arranged in the clamping blocks;
wherein the clamped piece comprises:
a clamped block, arranged above the rotary motor; and
a rotary permanent magnet, arranged in the clamped block.

4. The multi-material photocuring 3D printer according to claim 1 , wherein the multi-material photocuring 3D printer further comprises:
two resin collection devices, wherein the resin collection devices are arranged oppositely on the frame, and wherein the resin collection devices comprises:
a first connecting plate, arranged on the frame;
a second cylinder, arranged on the first connecting plate;
a second connecting plate, arranged on the second cylinder;
a third cylinder, arranged on the second connecting plate;
a first collection slot, arranged on the third cylinder; and
an extension direction of the third cylinder is perpendicular to an extension direction of the second cylinder.

5. The multi-material photocuring 3D printer according to claim 4 , wherein the multi-material photocuring 3D printer further comprises:
two post-curing devices, wherein the post-curing devices are arranged oppositely and located on a side of the resin collection device and wherein the post-curing devices comprises:
a third connecting plate, arranged on the frame;
a fourth cylinder, arranged on the third connecting plate;
a fourth connecting plate, arranged on the fourth cylinder;
a fifth cylinder, arranged on the fourth connecting plate;
a post-curing slot, arranged on the fifth cylinder; and
a UV curing light-emitting diode, arranged on the post-curing slot;
wherein an extension direction of the fifth cylinder is perpendicular to an extension direction of the fourth cylinder.

6. The multi-material photocuring 3D printer according to claim 1 , wherein, the multi-material photocuring 3D printer further comprises:
a resin slot switching device, arranged on the frame, wherein the resin slots are arranged on the resin slot switching device, and wherein the resin slot switching device comprises:
a driving assembly, arranged on the frame;
a leveling plate, arranged on the driving assembly;
a base plate, arranged on the leveling plate, wherein the resin slots are arranged on the base plate at an interval;
a plurality of first leveling assemblies, arranged on the leveling plate and connected to the base plate, wherein the first leveling assembly comprises:
a fifth connecting plate, connected to the base plate;
a first bolt, inserted through the fifth connecting plate;
a first spring, sleeved on the first bolt; and
a first screw block, arranged on the leveling plate, and threadedly connected with the first bolt.

7. The multi-material photocuring 3D printer according to claim 6 , wherein the printing platform comprises:
a plurality of second adjusting assemblies, wherein the plurality of second adjusting assemblies are arranged on the bracket, and connected with the printing platform, wherein the second adjusting assembly comprises:
a second bolt, penetrating through the printing platform;
a second spring, sleeved on the second bolt; and
a second screw block, arranged on the frame and threadedly connected with the second bolt.

8. The multi-material photocuring 3D printer according to claim 6 , wherein the lifting device comprises:
a first mounting dock, arranged on the printing platform;
a first driving motor, arranged on the first mounting dock and connected with the bracket;
wherein the driving assembly comprises:
a second mounting dock, arranged on the frame; and
a second driving motor, arranged on the second mounting dock and connected with the leveling plate.

Assignees

• Univ Southern Sci & Tech

Inventors

• Ge Qi
• Cheng Jianxiang

Classifications

• B29C64/124 Primary

  using layers of liquid which are selectively solidified · CPC title

• B29C64/241

  for rotary motion · CPC title

• B29C64/35

  Cleaning · CPC title

• B29C64/393

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title