Device and method for twisting electrostatic spinning superfine fiber

A method for twisting electrostatic spinning superfine fiber comprising the following steps:

• winding one end of a section of insulating string for a plurality of circles along the side surface of a circular truncated cone, bonding with a side surface of the circular truncated cone, winding the other end of the insulating string on a roller for a plurality of circles, and turning on a high-voltage electrostatic generator;
• after a polymer melt is melted and plasticized into a molten melt through an extruder, introducing the molten melt into an outer sleeve through a melt inlet, and meanwhile, opening a heating ring, wherein after flowing into an annular gap through the melt inlet, the molten melt continues to flow and is gradually and uniformly distributed in the circumferential direction, and then the molten melt continues to flow downwards to the inner side of the conical surface of a conical hole in the bottom of an outer sleeve;
• and the molten melt naturally flows downwards to an annular tip end at the bottom end of the outer sleeve along the inner wall surface due to the gravity effect and the adhesion effect and is annularly and uniformly distributed;
• due to the fact that the circular truncated cone is electrified after the high-voltage electrostatic generator is started, forming a high-voltage electric field between the surface of the circular truncated cone and the annular tip end at the bottom end of the outer sleeve so that the annular tip end at the bottom end of the outer sleeve is electrified in an induction mode, and adjusting the output voltage of the high-voltage electrostatic generator until the melt thin layer attached to the annular tip end is excited to form multiple jet flows under the action of the high-voltage electric field, wherein the multiple jet flows are self-organized and gradually and uniformly distributed to form multiple jet flows which are uniformly and stably spaced, the jet flows are cooled and solidified to form continuous superfine fiber, and due to the electrostatic adsorption effect, the continuous superfine fiber is adsorbed to the insulating string wound on the side surface of the circular truncated cone;
• turning on a rotary switch of the roller to enable the roller to rotate, winding the insulating string on the rotating roller so as to pull and wind the superfine fiber on the roller, continuously and automatically winding the bundled fiber on the roller due to the fact that the spun fiber is continuous long fiber, turning on an adjustable-speed motor to drive the circular truncated cone to rotate, twisting the fiber bundle adsorbed on the conical surface of the bottom of the circular truncated cone, and continuously collecting yarn formed after twisting by the roller;
• and
• adjusting the yarn twist by adjusting the rotating speed of the adjustable-speed motor so that the yarn meets the technological requirements, and changing the quantity of jet flows formed by exciting the melt thin layer attached to the annular tip end by changing the output voltage of the high-voltage electrostatic generator so that the technological requirement of the quantity of fiber in the yarn is met.