Mold for dry casing production

Abstract

The invention relates to the technical field of optical fiber and optical cable manufacturing equipment, in particular to a dry-type mold for sleeve production. The mold comprises a mold core, mold cover and a hollow silk threading needle which are assembled on an extruder head, wherein the mold core is provided with a middle through hole and an extruding nozzle, and an extruding gap is formed between the periphery of the extruding nozzle and an extruding opening of the mold cover; one end of the silk threading needle penetrates through the middle through hole of the mold core and extends out of the mold cover, the other end of the silk threading needle is connected with a fixing element through threads, and the fixing element is assembled on the extruder head and is provided with a gas inlet hole. Stabilized gas introduced from the gas inlet hole of the fixing element is continuously and steadily blown out of the extruding nozzle of the mold core, so that after the plastic is extruded and is at a high temperature melting state, the extruded plastic remains a steady outer diameter and a rounded shape, besides, gas with a lower temperature can also accelerate the cooling of the inner wall of the sleeve and effectively avoid the phenomena that the excess length of fibers in the sleeve is too long, the excess length is not steady, the sleeve becomes flat, and the size of the sleeve is not steady, and the transmission property, the mechanical and physical properties and the temperature property of the optical cable are ensured.

Description

technical field [0001] The invention relates to the technical field of optical fiber and cable manufacturing equipment, in particular to a mold for dry sleeve production. Background technique [0002] In the current production of optical cables, the production process of optical fiber sleeves is filled with fiber paste. Since the fiber paste is a paste-like substance, it will cause troubles in cleaning the production and use of optical cables. Nowadays, with the rise of fiber optic access to the home, optical cable access networks generally require clean, environmentally friendly, convenient splicing, and light-weight optical cables. Dry optical cables are an ideal choice. However, due to the lack of grease lubrication and isolation in the casing, the optical fiber is easy to contact the casing wall in a high temperature state, resulting in excessive and unstable excess length, which directly affects the transmission performance and temperature performance of the optical cab...

AI Technical Summary

Problems solved by technology

However, due to the lack of grease lubrication and isolation in the casing, the optical fiber is easy to contact the casing wall in a high temperature state, resulting in excessive and unstable excess length, which directly affects the transmission performance and temperature performance of the optical cable; another On the one hand, due to the lack of filling of the inner space of the sleeve with ointment, the sleeve is prone to flattening and the size of the sleeve is unstable, which further affects the performance of the optical cable

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