LIQUID MATERIAL PRINTHEAD FOR 3D PRINTER

A liquid material printhead for a 3D printer. The liquid material printhead is mainly composed of an air cylinder part (1), a connecting assembly (2), and a charging barrel part (3) which are sequentially connected from top to bottom; the charging barrel part (3) mainly comprises a guide sleeve (30), a charging barrel valve (31), a print spray head (32), and a sleeve lock nut (33); a piston body (11) in sealed sliding fit with the wall of an air chamber is provided in the air chamber of the air cylinder body; the connecting assembly (2) mainly comprises a connecting support (20) and a valve needle clamp (24); the piston body (11) is fixedly connected to an upper end of a valve rod (12); a lower end of the valve rod (12) extends out of the air cylinder body, enters a sealing sleeve, and is connected to an upper end of the valve needle clamp (24) after penetrating through the sealing sleeve; a valve needle (313) penetrates through a discharge port (312), a material cavity (316), a top needle hole (315), and a s