Pneumatic extrusion system and method of use thereof

• Main Authors: LIU CHUNLIU, SHI YONGLIANG, FU JINGYUAN, XIONG WEI, MA ZICHAO, WANG YI, PAN MIAOMIAO, ZHANG JIELING, LIU HAO, MA ZIFENG, LIN HETAO
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• 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 invention provides a pneumatic extrusion system and a using method thereof.The pneumatic extrusion system is applied to 3D printing operation of direct writing forming and comprises a charging barrel with a cavity and a piston assembly arranged in the cavity in a sliding mode, and the two ends of the charging barrel are provided with a feeding port and a discharging port which communicate with the cavity correspondingly; the piston assembly comprises a first piston, a second piston and a connecting rod connecting the first piston and the second piston, and the piston assembly divides the cavity into a material cavity located between the first piston and the discharging port, a communicating cavity located between the first piston and the second piston and an air cavity located between the second piston and the feeding port. And a communicating part for communicating the external environment with the communicating cavity is arranged on the charging barrel. According to the pneumatic extrusion system, no ga