Patent ID: 11970420
Assignee: CHINA JILIANG UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC C  Y | IPC C

Claim 0:
1. A molding device for an optical fiber preform, the molding device comprising a rotating mechanism, an extrusion mechanism, and a cylinder mold for preparing a hollow cladding sleeve, wherein the cylinder mold is of a cylindrical structure with two ends each having an opening, a corresponding one of two detachable plugging portions of the rotating mechanism is fitted with the opening, and the cylinder mold is rotationally connected to the rotating mechanism through the two plugging portions;
wherein the extrusion mechanism comprises a top die, an extrusion head and a bottom die, the top die is detachably connected to a first end of the two ends which is a top end of the cylinder mold vertically arranged, and the top die is formed with a through portion enabling a molten core glass inside the cladding sleeve to flow out; the extrusion head is located at a second end of the two ends which is a bottom end of the cylinder mold vertically arranged, and is provided with a feeding channel in communication with the cladding sleeve; the bottom die for pressing the molten core glass into the feeding channel is arranged at an inlet of the feeding channel; and a heat resisting cylinder is provided between the extrusion head and a bottom end of the cladding sleeve, and the heat resisting cylinder is formed with a flow guide channel for communicating the feeding channel and the cladding sleeve;
wherein the cylinder mold is connected to the rotating mechanism, and a heating jacket is arranged at a periphery of the cylinder mold;
wherein an end cylinder coaxial with the cylinder mold is arranged at an inner side of the cylinder mold, and an outer diameter of the end cylinder is matched with an inner diameter of the cylinder mold; and
wherein the cylinder mold is connected to the extrusion mechanism, an annular gasket coaxial with the cylinder mold is arranged at an inner side of the top end of the cylinder mold, the annular gasket has same inner and outer diameters as the end cylinder, and the top die abuts against the annular gasket.