US 12,447,676 B1
Extrusion device for enhancing bonding strength between 3D printing layers
Chang Liu, Hefei (CN)
Filed by Chang Liu, Hefei (CN)
Filed on May 29, 2025, as Appl. No. 19/221,912.
Claims priority of application No. 202510575556.1 (CN), filed on Apr. 30, 2025.
Int. Cl. B29C 64/209 (2017.01); B29C 64/241 (2017.01); B29C 64/268 (2017.01); B33Y 30/00 (2015.01)
CPC B29C 64/209 (2017.08) [B29C 64/241 (2017.08); B29C 64/268 (2017.08); B33Y 30/00 (2014.12)] 8 Claims
OG exemplary drawing
 
1. An extrusion device for enhancing a bonding strength between three-dimensional printing layers, the extrusion device comprising:
a multi-axis driving device and an extrusion unit, wherein the extrusion unit comprises a base and an extruder, the base is disposed on the multi-axis driving device, and the multi-axis driving device is configured to drive the extrusion unit to move, wherein the base comprises a connecting frame and a device plate, the connecting frame is a right-angle structure, an end of the connecting frame is connected to the multi-axis driving device, the device plate is disposed on an end of the connecting frame facing away from the multi-axis driving device, the extruder is disposed on the device plate, an extrusion head is disposed on the extruder, and the extrusion head is disposed below the device plate, wherein the device plate is a circular structure, and the annular guide rail is disposed on a circumferential side of the device plate; and the annular guide rail is configured to, when the multi-axis driving device drives the extrusion unit to move, move synchronously with the extrusion unit;
a laser heating unit, wherein the laser heating unit comprises an annular guide rail, a sliding seat, and a laser emitter; the laser emitter is disposed on the sliding seat, the sliding seat is slidably disposed on the annular guide rail, and the annular guide rail is disposed on a circumferential side of the extruder; and a driving mechanism is disposed on the sliding seat, and the driving mechanism is configured to drive the laser emitter to rotate around the extruder; a main controller disposed on the extruder, a displacement sensor is configured to upload motion trajectory parameters formed by the extruder during 3D printing to the main controller; and a rotation speed controller disposed on the driving mechanism, wherein the main controller is configured to: calculate a rotation angle theta of the laser emitter based on a motion trajectory of the extruder, and the laser emitter is configured to rotate based on the rotation angle theta to thereby make laser emitted by the extruder continuously heat an area to be covered by a material extruded by the extruder.