FDM 3D printing head and 3D printer

• Main Authors: HU XIONGFENG, CHEN ENQI, HOU JUN, MA LINKE
• Format: Patent
• Language: Chinese; English
• Published: 17.02.2023
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The utility model provides an FDM 3D printing head. The FDM 3D printing head comprises an extrusion mechanism, a coating mechanism and a blockage alarm mechanism. The extrusion mechanism comprises a throat pipe and an extrusion assembly; the throat pipe is provided with a feeding end and a discharging end, and an exposed groove hole is formed in the throat pipe and located between the feeding end and the discharging end. The extrusion assembly is arranged at the feeding end of the throat pipe and used for conveying consumables into the throat pipe. The blockage alarm mechanism comprises an abutting wheel and a detection piece, the abutting wheel is rotationally arranged on one side of the throat pipe, and the abutting wheel partially extends into the exposed groove hole and abuts against the consumable; the detection piece is electrically connected with the extrusion assembly, and the detection piece is configured to detect whether the abutting wheel rotates or not and send a detection result to the extrusion